Quasar, Sobaken and Vermin: reveal the details of the current cyber espionage campaign
Using Quasar, Sobaken and Vermin remote access tools, cybercriminals monitor Ukrainian government agencies and steal data from their systems. This cyber group was first mentioned in a report in January 2018, attracted the attention of ESET in mid-2017, and today continues to develop its software.
In this report, we reveal the details of the current campaign, provide information about malware, and describe the methods that attackers use to distribute, target, and avoid detection.
It appears that this group does not have outstanding technical knowledge or access to zero-day vulnerabilities. Nevertheless, she successfully uses social engineering to spread Malvari and covert work for a long time.
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We managed to track her work until October 2015, but it is possible that the group started its activity much earlier.
The attackers use three versions of .NET-Malvari: Quasar RAT (Remote Administration Tool), Sobaken (derived from RAT from Quasar) and custom RAT Vermin. The tools were simultaneously used on the same target sites, they partially share the infrastructure and connect to the same C & C servers. A possible explanation for the use of three parallel modifications is the fact that they were developed independently of each other.
Malicious software is used in attacks on Ukrainian government agencies. According to ESET telemetry, there are hundreds of victims in various organizations and several hundred executables related to this campaign.
Figure 1 shows the main campaign events in chronological order.
Figure 1. Campaign Timeline
According to our telemetry, attackers use e-mail as the primary distribution channel for the three RATs. They use social engineering to convince victims to download and run malware.
In most cases, the file names are written in Ukrainian and are related to the work of the victims. Here are examples of such files:
In addition to the basic social engineering techniques (drawing attention to the attachment), the attackers use three technical methods. This is likely to further increase the effectiveness of campaigns.
Method # 1 : Email applications use the Unicode symbol right-to-left override , which changes the direction of reading characters, to hide the real extension. In fact, these are executable files that use Word, Excel, PowerPoint, or Acrobat Reader icons to avoid suspicion.
An example of a file name: as shown in Figure 2, “Carrying solid firewood (firewood) for a firewood _ <> xcod scr” (“Transporting firewood for heating”) will look to inattentive users as a .DOCX file.
Figure 2. Executable file masquerading as a Word document
Method number 2 : e-mail applications, masquerading as self-extracting archives RAR.
Example: email with attachment "Nakaz_MOU_Dodatki_do_Instruktsii_440_ost.rar" ( "Order of the Ministry of Defense, the Annex to the manual # 440"), as shown in Figure 3. Inside the RAR archive have an executable file named "Nakaz_MOU_Dodatki_do_Instruktsii_440_ost.exe" using the icon RAR SFX.
Presumably, the victims launch this file, waiting for further unpacking of the contents of the self-extracting archive, but thereby unwittingly launch a malicious executable file.
Method number 3 : Word document + exploit CVE-2017-0199. This vulnerability applies when a victim opens a specially crafted Word document. The Word process sends an HTTP request for an HTA file containing a malicious script located on a remote server. Then the malicious script is launched by
According to ESET telemetry, these attackers began using this method in May 2017. The attackers used hxxp: // chip-tuning lg [] ua / to deliver the HTA files and the final payload.
Figure 3. File disguised as a self-extracting RAR archive. The version and copyright data suggest that this is a fake
The installation procedure is the same for the three versions of Malvari used by this group. Dropper resets payload files (Vermin, Quasar or Sobaken) to the
Figure 4. Task launching the malicious component every 10 minutes
Examples:
Attackers use a lot of techniques to make malware work only on target machines. Especially carefully they try to avoid automated analysis systems and sandboxes.
Method number 1 : check keyboard layouts in Windows
Malware checks if the Russian or Ukrainian keyboard layout is installed. If not, her work is immediately terminated.
Method # 2 : Verify IP Address
Malware gets the IP address of the infected computer through a request to a legitimate service
Ipinfo.io/json. The work will be completed if the IP address is not found on the territory of Ukraine or Russia, or if it is registered with one of several selected cloud service providers or anti-virus software developers. The code that performs the verification is shown in the disassembly results in Figures 5 and 6.
Figure 5. The code that performs geolocation verification of the IP address of the infected machine
Figure 6. A code verifying the IP address with a list of cloud service providers and anti-virus vendors
Method # 3 : Check Network Emulation
Automated analysis systems often use tools such as Fakenet-NG, where DNS / HTTP communication succeeds and yields some kind of result. Malvari authors try to determine such systems by generating a random name / URL of the site and verify that there is no connection to this URL (in Figure 7), as it would be on a real system.
Figure 7. Code that generates a random URL and starts the download
Method # 4 : Check for a specific username
Malware does not run under an account with a username typical of automated malware analysis systems, as shown in Figure 8.
Figure 8. Verify current username with a list of known malware analysis systems
Since mid-2017, attackers have been using steganography, hiding malicious components in images on free hosting sites saveshot.net and ibb.co.
Steganography is a science that allows you to hide data “in plain sight”, inside other, unclassified information. In our case, the malicious EXE file was encrypted and hidden in a JPEG file, as in Figure 9. The malware downloads and decodes JPEG, extracts hidden data, decrypts the EXE file from this data, and launches it.
Figure 9. An example of a JPEG image used to hide a malicious component being delivered (resized and component removed)
The decryption process is rather complicated and can be described as follows:
1. Downloading a JPEG file from a URL that is hard coded in a binary.
2. Bruteforce password of eight digits through the calculation of its hash and reconciliation with the hash, hard-coded in the downloaded binary file. This step uses the CPU intensively, it takes more than 10 minutes to complete it on a regular computer. Most likely, this is another measure to counteract automated malware analysis systems.
3. Processing the JPEG file and extracting the data hidden in it, as can be seen from the disassembled code in Figures 10 and 11. The algorithm used by malware is very similar to that used in JSteg, one of the oldest and simplest steganography algorithms for JPEG files. It hides the data in the LSB (lowest-order bit) of the coefficients of the discrete cosine transform of the JPEG file. Such hidden data usually does not affect the image in a way visible to the naked eye, but specialized algorithms easily detect their presence. However, this steganography algorithm is very easy to implement, which was probably the reason for the choice of the Malvari authors.
4. Extract data and unpack it with GZip.
5. Decryption of the unpacked data on AES with the password obtained in step â„–2.
6. Decoding Base64 decrypted data.
7. Write EXE file to disk and execute.
As a result, the authors of this threat abandoned the idea of ​​using steganography and began to use hxxp: // chip-tuning lg [] ua to transfer unencrypted executable files.
Figure 10. Steganography code inside a JPEG decoder
Figure 11. Steganography code inside a JPEG decoder
These attackers use three modifications of Malvari in attacks. Below we give a brief overview of each and concentrate on the description of the characteristic features.
Quasar is an open source RAT available on GitHub. We have seen several campaigns in which this cybergroup used Quasar RAT binaries. The first known campaign lasted from October 2015 to April 2016. The next one was in February 2017. Compile artifacts show the path to PDB
Another campaign with Quasar RAT, using the command servers of these attackers (mailukr.net), was launched in July-September 2017. The attackers used an old version of Quasar RAT called “xRAT 2.0 RELEASE3”. Compilation artifacts in the dropper show the path to the PDB
Sobaken is a significantly modified version of Quasar RAT. If you compare the structure of the program Quasar and Sobaken, you can see a lot in common - see Figure 12.
The authors of Sobaken have reduced the functionality of Malvari, so the executable file has become smaller and easier to hide. They also added techniques for circumventing the sandbox and others described above.
Figure 12. The evolution of Sobaken. Left Quasar RAT v1.3, in the middle and on the right - two versions of Sobaken
Vermin is a custom backdoor that only this cyber group uses. Malvar was first documented in the January 2018 report of Palo Alto Networks . The backdoor appeared in mid-2016 and is still in use. Like Quasar with Sobaken, it is written in .NET. To make analysis difficult, the code is protected with the help of the commercial system of protection of the .NET code Reactor or with the open-end protector ConfuserEx.
In addition, like Sobaken, it uses Vitevic Assembly Embedder, free software for embedding the necessary DLLs in the main executable file that is in the Visual Studio Marketplace store.
Vermin is a full-featured backdoor with several optional components. The latest version known at the time of writing (Vermin 2.0) supports the following commands, the essence of which can be understood from the names:
- StartCaptureScreen
- StopCaptureScreen
- ReadDirectory
- UploadFile
- DownloadFile
- CancelUploadFile
- CancelDownloadFile
- GetMonitors
- DeleteFiles
- ShellExec
- GetProcesses
- KillProcess
- CheckIfProcessIsRunning
- CheckIfTaskIsRunning
- RunKeyLogger
- CreateFolder
- RenameFolder
- DeleteFolder
- UpdateBot
- RenameFile
- ArchiveAndSplit
- StartAudioCapture
- StopAudioCapture
- SetMicVolume
Most commands are implemented in the main payload. Only a few commands and additional functions - through optional components, loaded by attacking the victim's car. Among the optional components are:
- Record audio
- Keylogger
- Password Theft
- Theft of a file from USB (USB file stealer)
A full-featured Vermin component that can record sound from a victim's computer microphone. It accepts three Vermin commands: StartAudioCapture, StopAudioCapture and SetMicVolume. The resulting data is compressed using Speex codecs and uploaded in SOAP format to Vermin's C & C servers.
Vermin Keylogger is a simple, separate executable file that intercepts all keystrokes and writes them to a file in encrypted form. It also records the contents of the buffer and the names of the active windows. The keylogger itself cannot communicate with Vermin's C & C servers; The main backdoor is used to transfer the collected information.
The path to the PDB in the keylogger confirms the connection with the malware Vermin:
A separate component Vermin to steal passwords is used to extract saved passwords from browsers (Chrome, Opera). The main part of the code seems to be copied from the article from Habr . Some samples also contain code to extract information from the Firefox browser, but it seems that it is not used. As shown in Figure 13, this component also contains the paths to the PDB, similar to the keylogger component, which confirms the connection with Vermin.
Figure 13. Compile artifacts that allow you to associate a component to steal a password with Vermin
Since April 2018, the file theft component has been used as a separate tool. He copies the files and immediately uploads them to the attacking server controlled by the attacker.
In the analyzed samples, attackers searched for files with the following extensions:
- doc
- docx
- xls
- xlsx
- zip
- rar
- 7z
- docm
- txt
- rtf
- xlsm
- pdf
- jpg
- jpeg
- tif
- odt
- ods
Among the many malware attacks targeting high-ranking sites in Ukraine, this campaign has not received much attention. Perhaps this is due to the use of code from open sources. However, the group has already moved on to developing its own toolkit.
The use of several families of malware and infection mechanisms, including social engineering and steganography, over the past three years may be due to the fact that attackers have been experimenting with methods or working in several groups.
The successful application of trivial techniques (for example, sending RAR and EXE by e-mail) underlines the importance of protection from the human factor.
Most of the files were automatically recognized by ESET as being similar to malware. Detections are directly related to most of the files in the campaign:
In this report, we reveal the details of the current campaign, provide information about malware, and describe the methods that attackers use to distribute, target, and avoid detection.
Attacking profile
It appears that this group does not have outstanding technical knowledge or access to zero-day vulnerabilities. Nevertheless, she successfully uses social engineering to spread Malvari and covert work for a long time.
')
We managed to track her work until October 2015, but it is possible that the group started its activity much earlier.
The attackers use three versions of .NET-Malvari: Quasar RAT (Remote Administration Tool), Sobaken (derived from RAT from Quasar) and custom RAT Vermin. The tools were simultaneously used on the same target sites, they partially share the infrastructure and connect to the same C & C servers. A possible explanation for the use of three parallel modifications is the fact that they were developed independently of each other.
The victims
Malicious software is used in attacks on Ukrainian government agencies. According to ESET telemetry, there are hundreds of victims in various organizations and several hundred executables related to this campaign.
Chronology
Figure 1 shows the main campaign events in chronological order.
Figure 1. Campaign Timeline
Spread
According to our telemetry, attackers use e-mail as the primary distribution channel for the three RATs. They use social engineering to convince victims to download and run malware.
In most cases, the file names are written in Ukrainian and are related to the work of the victims. Here are examples of such files:
- "INSTITUTION of the organization of the defection of the military service of the Ukrainian Forces and members of the family" ("Order on ensuring the safety of the military of the Ukrainian army and their families")
- “A new project will be ordered, an assignment of the interchange of willows” (“New draft order of the check of seizure”)
- "Interviewing Don OVK ZbŃ–lshennya lŃ–mŃ–tu" ("Supply Department Don OVK. Increasing the credit limit")
In addition to the basic social engineering techniques (drawing attention to the attachment), the attackers use three technical methods. This is likely to further increase the effectiveness of campaigns.
Method # 1 : Email applications use the Unicode symbol right-to-left override , which changes the direction of reading characters, to hide the real extension. In fact, these are executable files that use Word, Excel, PowerPoint, or Acrobat Reader icons to avoid suspicion.
An example of a file name: as shown in Figure 2, “Carrying solid firewood (firewood) for a firewood _ <> xcod scr” (“Transporting firewood for heating”) will look to inattentive users as a .DOCX file.
Figure 2. Executable file masquerading as a Word document
Method number 2 : e-mail applications, masquerading as self-extracting archives RAR.
Example: email with attachment "Nakaz_MOU_Dodatki_do_Instruktsii_440_ost.rar" ( "Order of the Ministry of Defense, the Annex to the manual # 440"), as shown in Figure 3. Inside the RAR archive have an executable file named "Nakaz_MOU_Dodatki_do_Instruktsii_440_ost.exe" using the icon RAR SFX.
Presumably, the victims launch this file, waiting for further unpacking of the contents of the self-extracting archive, but thereby unwittingly launch a malicious executable file.
Method number 3 : Word document + exploit CVE-2017-0199. This vulnerability applies when a victim opens a specially crafted Word document. The Word process sends an HTTP request for an HTA file containing a malicious script located on a remote server. Then the malicious script is launched by
mshta.exe . The first public information about this vulnerability appeared in April 2017 , and Microsoft closed it, releasing a security update for all versions of Windows and Office.According to ESET telemetry, these attackers began using this method in May 2017. The attackers used hxxp: // chip-tuning lg [] ua / to deliver the HTA files and the final payload.
Figure 3. File disguised as a self-extracting RAR archive. The version and copyright data suggest that this is a fake
Installation and Persistence
The installation procedure is the same for the three versions of Malvari used by this group. Dropper resets payload files (Vermin, Quasar or Sobaken) to the
%APPDATA% folder, to a subfolder with the name of a legitimate company (usually Adobe, Intel or Microsoft). Then, as shown in Figure 4, it creates a task in the scheduler to run the component every 10 minutes to ensure persistence. Some versions also use the method of using the quick call feature of the Windows Control Panel to make their folders inaccessible from Windows Explorer. These folders will not open when clicked in Windows Explorer, instead the “All Tasks” page opens.Figure 4. Task launching the malicious component every 10 minutes
Examples:
C:\Users\Admin\AppData\Roaming\Microsoft\Proof\Settings.{ED7BA470-8E54-465E-825C- 99712043E01C}\TransactionBroker32.exe
C:\Users\Admin\AppData\Roaming\Adobe\SLStore\Setting.{ED7BA470-8E54-465E-825C- 99712043E01C}\AdobeSLService.exeTargeting
Attackers use a lot of techniques to make malware work only on target machines. Especially carefully they try to avoid automated analysis systems and sandboxes.
Method number 1 : check keyboard layouts in Windows
Malware checks if the Russian or Ukrainian keyboard layout is installed. If not, her work is immediately terminated.
Method # 2 : Verify IP Address
Malware gets the IP address of the infected computer through a request to a legitimate service
Ipinfo.io/json. The work will be completed if the IP address is not found on the territory of Ukraine or Russia, or if it is registered with one of several selected cloud service providers or anti-virus software developers. The code that performs the verification is shown in the disassembly results in Figures 5 and 6.
Figure 5. The code that performs geolocation verification of the IP address of the infected machine
Figure 6. A code verifying the IP address with a list of cloud service providers and anti-virus vendors
Method # 3 : Check Network Emulation
Automated analysis systems often use tools such as Fakenet-NG, where DNS / HTTP communication succeeds and yields some kind of result. Malvari authors try to determine such systems by generating a random name / URL of the site and verify that there is no connection to this URL (in Figure 7), as it would be on a real system.
Figure 7. Code that generates a random URL and starts the download
Method # 4 : Check for a specific username
Malware does not run under an account with a username typical of automated malware analysis systems, as shown in Figure 8.
Figure 8. Verify current username with a list of known malware analysis systems
Steganography application
Since mid-2017, attackers have been using steganography, hiding malicious components in images on free hosting sites saveshot.net and ibb.co.
Steganography is a science that allows you to hide data “in plain sight”, inside other, unclassified information. In our case, the malicious EXE file was encrypted and hidden in a JPEG file, as in Figure 9. The malware downloads and decodes JPEG, extracts hidden data, decrypts the EXE file from this data, and launches it.
Figure 9. An example of a JPEG image used to hide a malicious component being delivered (resized and component removed)
The decryption process is rather complicated and can be described as follows:
1. Downloading a JPEG file from a URL that is hard coded in a binary.
2. Bruteforce password of eight digits through the calculation of its hash and reconciliation with the hash, hard-coded in the downloaded binary file. This step uses the CPU intensively, it takes more than 10 minutes to complete it on a regular computer. Most likely, this is another measure to counteract automated malware analysis systems.
3. Processing the JPEG file and extracting the data hidden in it, as can be seen from the disassembled code in Figures 10 and 11. The algorithm used by malware is very similar to that used in JSteg, one of the oldest and simplest steganography algorithms for JPEG files. It hides the data in the LSB (lowest-order bit) of the coefficients of the discrete cosine transform of the JPEG file. Such hidden data usually does not affect the image in a way visible to the naked eye, but specialized algorithms easily detect their presence. However, this steganography algorithm is very easy to implement, which was probably the reason for the choice of the Malvari authors.
4. Extract data and unpack it with GZip.
5. Decryption of the unpacked data on AES with the password obtained in step â„–2.
6. Decoding Base64 decrypted data.
7. Write EXE file to disk and execute.
As a result, the authors of this threat abandoned the idea of ​​using steganography and began to use hxxp: // chip-tuning lg [] ua to transfer unencrypted executable files.
Figure 10. Steganography code inside a JPEG decoder
Figure 11. Steganography code inside a JPEG decoder
Malvari Modifications
These attackers use three modifications of Malvari in attacks. Below we give a brief overview of each and concentrate on the description of the characteristic features.
Quasar
Quasar is an open source RAT available on GitHub. We have seen several campaigns in which this cybergroup used Quasar RAT binaries. The first known campaign lasted from October 2015 to April 2016. The next one was in February 2017. Compile artifacts show the path to PDB
n:\projects\Viral\baybak_files_only\QRClient\QuasarRAT-master\Library\obj\ Release\Library.pdbAnother campaign with Quasar RAT, using the command servers of these attackers (mailukr.net), was launched in July-September 2017. The attackers used an old version of Quasar RAT called “xRAT 2.0 RELEASE3”. Compilation artifacts in the dropper show the path to the PDB
N:\shtorm\WinRARArchive\ obj\Release\WinRAR.pdbSobaken
Sobaken is a significantly modified version of Quasar RAT. If you compare the structure of the program Quasar and Sobaken, you can see a lot in common - see Figure 12.
The authors of Sobaken have reduced the functionality of Malvari, so the executable file has become smaller and easier to hide. They also added techniques for circumventing the sandbox and others described above.
Figure 12. The evolution of Sobaken. Left Quasar RAT v1.3, in the middle and on the right - two versions of Sobaken
Vermin
Vermin is a custom backdoor that only this cyber group uses. Malvar was first documented in the January 2018 report of Palo Alto Networks . The backdoor appeared in mid-2016 and is still in use. Like Quasar with Sobaken, it is written in .NET. To make analysis difficult, the code is protected with the help of the commercial system of protection of the .NET code Reactor or with the open-end protector ConfuserEx.
In addition, like Sobaken, it uses Vitevic Assembly Embedder, free software for embedding the necessary DLLs in the main executable file that is in the Visual Studio Marketplace store.
Functional
Vermin is a full-featured backdoor with several optional components. The latest version known at the time of writing (Vermin 2.0) supports the following commands, the essence of which can be understood from the names:
- StartCaptureScreen
- StopCaptureScreen
- ReadDirectory
- UploadFile
- DownloadFile
- CancelUploadFile
- CancelDownloadFile
- GetMonitors
- DeleteFiles
- ShellExec
- GetProcesses
- KillProcess
- CheckIfProcessIsRunning
- CheckIfTaskIsRunning
- RunKeyLogger
- CreateFolder
- RenameFolder
- DeleteFolder
- UpdateBot
- RenameFile
- ArchiveAndSplit
- StartAudioCapture
- StopAudioCapture
- SetMicVolume
Most commands are implemented in the main payload. Only a few commands and additional functions - through optional components, loaded by attacking the victim's car. Among the optional components are:
- Record audio
- Keylogger
- Password Theft
- Theft of a file from USB (USB file stealer)
Audio Recording Tool (AudioManager)
A full-featured Vermin component that can record sound from a victim's computer microphone. It accepts three Vermin commands: StartAudioCapture, StopAudioCapture and SetMicVolume. The resulting data is compressed using Speex codecs and uploaded in SOAP format to Vermin's C & C servers.
Keylogger (KeyboardHookLib)
Vermin Keylogger is a simple, separate executable file that intercepts all keystrokes and writes them to a file in encrypted form. It also records the contents of the buffer and the names of the active windows. The keylogger itself cannot communicate with Vermin's C & C servers; The main backdoor is used to transfer the collected information.
The path to the PDB in the keylogger confirms the connection with the malware Vermin:
Z:\Projects\Vermin\KeyboardHookLib\obj\Release\AdobePrintLib.pdbPassword Theft Tool (PwdFetcher)
A separate component Vermin to steal passwords is used to extract saved passwords from browsers (Chrome, Opera). The main part of the code seems to be copied from the article from Habr . Some samples also contain code to extract information from the Firefox browser, but it seems that it is not used. As shown in Figure 13, this component also contains the paths to the PDB, similar to the keylogger component, which confirms the connection with Vermin.
Figure 13. Compile artifacts that allow you to associate a component to steal a password with Vermin
USB File Theft Tool (UsbGuard)
UsbGuard.exe is an optional component used by both Sobaken and Vermin. This is a small separate program that tracks USB drives connected to a computer and copies all files that match the filter configured by the attackers. The stolen files are then transferred using the main backdoor module. Many different paths to the PDB have been found in the sample of this component, which explicitly links it to Vermin.Since April 2018, the file theft component has been used as a separate tool. He copies the files and immediately uploads them to the attacking server controlled by the attacker.
In the analyzed samples, attackers searched for files with the following extensions:
- doc
- docx
- xls
- xlsx
- zip
- rar
- 7z
- docm
- txt
- rtf
- xlsm
- jpg
- jpeg
- tif
- odt
- ods
Conclusion
Among the many malware attacks targeting high-ranking sites in Ukraine, this campaign has not received much attention. Perhaps this is due to the use of code from open sources. However, the group has already moved on to developing its own toolkit.
The use of several families of malware and infection mechanisms, including social engineering and steganography, over the past three years may be due to the fact that attackers have been experimenting with methods or working in several groups.
The successful application of trivial techniques (for example, sending RAR and EXE by e-mail) underlines the importance of protection from the human factor.
Compromise Indicators (IoC)
C & C Servers
Sobaken c & c
akamaicdn.ru
akamainet021.info
cdnakamai.ru
windowsupdate.kiev.ua
akamainet022.info
akamainet066.info
akamainet067.info
notifymail.ru
mailukr.net
188.227.16.73
212.116.121.46
206.54.179.160Quasar C & C
188.227.75.189
mailukr.net
cdnakamai.ru
notifymail.ruVermin C & C
185.158.153.222
188.227.17.68
195.78.105.23
tech-adobe.dyndns.biz
notifymail.ru
akamainet023.info
mailukr.net
185.125.46.24
akamainet024.info
206.54.179.196Component transfer, data exfiltration
chip-tuning.lg.ua
www.chip-tuning.lg.ua
olx.website
news24ua.info
rst.website
1ua.eu
novaposhta.websiteSHA1
Vermin
028EBDBEBAC7239B41A1F4CE8D2CC61B1E09983B
07E1AF6D3F7B42D2E26DF12A217DEBACEDB8B1B9
09457ACB28C754AA419AB6A7E8B1940201EF3FFE
0EEE92EC2723ED9623F84082DAD962778F4CF776
10128AB8770FBDECD81B8894208A760A3C266D78
131F99A2E18A358B60F09FD61EE312E74B02C07C
14F69C7BFAF1DF16E755CCF754017089238B0E7B
1509F85DE302BE83A47D5AFAD9BEE2542BA317FC
170CEE6523B6620124F52201D943D7D9CA7B95E5
191159F855A0E580290871C945245E3597A5F25C
1F12C32A41D82E978DE333CD4E93FDAA1396BE94
22B17966B597568DB46B94B253CD37CBCF561321
2C7332D8247376842BD1B1BD5298844307649C99
2E08BA5DF30C0718C1733A7836B5F4D98D84905E
2EDF808F8252A4CBCB92F47A0AEDC1AAAE79A777
360F54B33AC960EE29CA0557A28F6BB8417EF409
431FCE6A47D0A48A57F699AA084C9FF175A9D15F
45438834FDC5C690DA3BC1F60722BE86B871280D
4A8A8188E3A7A137651B24780DF37CB6F610CC19
4C1E4E136B7922F9E28D1B38E9760E28929E4F0B
5B6EA57FFC09593C3B65D903368EA5F7FAA2EB68
61D366939FE36861B2FECB38A4DFF6D86C925A00
6A72366D8AE09F72F0466FB59E8ED372F8B460D7
6FECA622B0FB282064F7DE42BA472A8EC908D0D6
70A772485C5ED330C6876FA901BA722CD44CA05E
70D97367A3DBD5D45482B6AF8C78C58B64D3F3B3
7803FD9753930522705F2B6B4E73622887892C28
7B11A84B18DC4B5F1F2826E7925F0B2DC1B936AE
889FD0BEB3197DDD6C88F5C40D6B8E4D74A892CE
9B6FBABFA2A77FA633F7A2EB352979D5C68CEBC6
A451291F17489E3A59F440A1B693D691B053C531
A53D77E55A06CF131D670339BACEC5AC0F0C6D66
A925D0AFB5D4F5FAC65543C993BE4172F1DBF329
B5F81C804E47B76C74C38DF03A5CBE8A4FE69A9A
B99DE55043099E9506B304660B8E1374787AB195
C00C104FC3E9F5977D11C67EF0C8C671D4DFC412
CA0296FA9F48E83EA3F26988401B3F4C4E655F7A
D4C6540E789BD3839D65E7EDA5CCA8832493649E
D5EDE1BBB9A12757E24BE283AFC8D746ADC4A0D4
DEFBFD98C74BEFF839EEB189F0F6C385AD6BA19B
ECF152EB6417A069573F2C7D9A35B9CC31EC8F56
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EF09AC6BA08A116F2C4080CBEE8CEF9523E21265
F414C49CF502D1B6CC46E08F3AC97D7846B30732Sobaken
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D21B8514990B0CEAC5EAE687DEAA60B447139B9DSteganography
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F63BE193C8A0FBB430F3B88CC8194D755BAD9CD1Detection by ESET products
Most of the files were automatically recognized by ESET as being similar to malware. Detections are directly related to most of the files in the campaign:
MSIL/Agent AWB
MSIL/Agent AZG
MSIL/Agent AZJ
MSIL/Agent AZX
MSIL/Agent BCH
MSIL/Agent BCV
MSIL/Agent BCY
MSIL/Agent BFT
MSIL/Agent BGB
MSIL/Agent BGC
MSIL/Agent BGE
MSIL/Agent BGM
MSIL/Agent BJU
MSIL/Agent SCM
MSIL/Spy Agent BBB
MSIL/Spy Agent BIF
MSIL/TrojanDownloader Agent DYV
MSIL/TrojanDownloader Small BBM
MSIL/TrojanDropper Agent DBE
MSIL/TrojanDropper Agent DJQ
MSIL/TrojanDropper Agent DJR
Source: https://habr.com/ru/post/418165/
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