Analysis
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max time kernel
150s -
max time network
66s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
09-11-2020 19:27
Static task
static1
Behavioral task
behavioral1
Sample
file.dll
Resource
win7v20201028
Behavioral task
behavioral2
Sample
file.dll
Resource
win10v20201028
General
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Target
file.dll
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Size
164KB
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MD5
708ef2feaf6fc35f33486111d9c0f97b
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SHA1
9d91bfe8fd44ff1d75551807017e634c2b7580d1
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SHA256
23d7cd4b0535b40662dc211b4ae28c4b5383c66b4b686064bd391a259da80d48
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SHA512
35db49ab278f1c78d7193e8c75d07fd9d66bab62a7f140b451f03b9fe49138525d92ffe08cd155ae4b6ceec4eca91f2253fba71ddf1af5cb6f701d9b3899d04f
Malware Config
Extracted
C:\4870u42-readme.txt
sodinokibi
http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/27152F2BE094E04F
http://decryptor.cc/27152F2BE094E04F
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 10 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
rundll32.exedescription ioc process File renamed C:\Users\Admin\Pictures\ConfirmRevoke.raw => \??\c:\users\admin\pictures\ConfirmRevoke.raw.4870u42 rundll32.exe File renamed C:\Users\Admin\Pictures\PushDisable.tiff => \??\c:\users\admin\pictures\PushDisable.tiff.4870u42 rundll32.exe File opened for modification \??\c:\users\admin\pictures\FindResize.tiff rundll32.exe File opened for modification \??\c:\users\admin\pictures\PushDisable.tiff rundll32.exe File renamed C:\Users\Admin\Pictures\FindResize.tiff => \??\c:\users\admin\pictures\FindResize.tiff.4870u42 rundll32.exe File renamed C:\Users\Admin\Pictures\PublishRestart.raw => \??\c:\users\admin\pictures\PublishRestart.raw.4870u42 rundll32.exe File renamed C:\Users\Admin\Pictures\SubmitOpen.tif => \??\c:\users\admin\pictures\SubmitOpen.tif.4870u42 rundll32.exe File renamed C:\Users\Admin\Pictures\UnregisterDisable.png => \??\c:\users\admin\pictures\UnregisterDisable.png.4870u42 rundll32.exe File renamed C:\Users\Admin\Pictures\CompressDisable.raw => \??\c:\users\admin\pictures\CompressDisable.raw.4870u42 rundll32.exe File renamed C:\Users\Admin\Pictures\DisconnectInvoke.tif => \??\c:\users\admin\pictures\DisconnectInvoke.tif.4870u42 rundll32.exe -
Enumerates connected drives 3 TTPs 25 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
rundll32.exedescription ioc process File opened (read-only) \??\L: rundll32.exe File opened (read-only) \??\M: rundll32.exe File opened (read-only) \??\S: rundll32.exe File opened (read-only) \??\V: rundll32.exe File opened (read-only) \??\F: rundll32.exe File opened (read-only) \??\H: rundll32.exe File opened (read-only) \??\J: rundll32.exe File opened (read-only) \??\P: rundll32.exe File opened (read-only) \??\Q: rundll32.exe File opened (read-only) \??\R: rundll32.exe File opened (read-only) \??\Z: rundll32.exe File opened (read-only) \??\D: rundll32.exe File opened (read-only) \??\A: rundll32.exe File opened (read-only) \??\I: rundll32.exe File opened (read-only) \??\O: rundll32.exe File opened (read-only) \??\W: rundll32.exe File opened (read-only) \??\X: rundll32.exe File opened (read-only) \??\B: rundll32.exe File opened (read-only) \??\E: rundll32.exe File opened (read-only) \??\G: rundll32.exe File opened (read-only) \??\K: rundll32.exe File opened (read-only) \??\N: rundll32.exe File opened (read-only) \??\T: rundll32.exe File opened (read-only) \??\U: rundll32.exe File opened (read-only) \??\Y: rundll32.exe -
Drops file in System32 directory 1 IoCs
Processes:
powershell.exedescription ioc process File opened for modification C:\Windows\System32\CatRoot2\dberr.txt powershell.exe -
Modifies service 2 TTPs 5 IoCs
Processes:
vssvc.exedescription ioc process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\SwProvider_{b5946137-7b9f-4925-af80-51abd60b20d5} vssvc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer vssvc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\COM+ REGDB Writer vssvc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\ASR Writer vssvc.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Shadow Copy Optimization Writer vssvc.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
rundll32.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\msvog50c56647.bmp" rundll32.exe -
Drops file in Program Files directory 33 IoCs
Processes:
rundll32.exedescription ioc process File opened for modification \??\c:\program files\EditTest.wvx rundll32.exe File opened for modification \??\c:\program files\MeasureFormat.wm rundll32.exe File opened for modification \??\c:\program files\SearchSuspend.mpeg rundll32.exe File opened for modification \??\c:\program files\CompleteGet.css rundll32.exe File opened for modification \??\c:\program files\ConvertToOpen.vdx rundll32.exe File opened for modification \??\c:\program files\DismountAdd.rmi rundll32.exe File opened for modification \??\c:\program files\AssertGet.cr2 rundll32.exe File opened for modification \??\c:\program files\ReceiveUnprotect.mpp rundll32.exe File opened for modification \??\c:\program files\RenameRestart.wpl rundll32.exe File opened for modification \??\c:\program files\WatchRegister.scf rundll32.exe File opened for modification \??\c:\program files\AddClear.jpeg rundll32.exe File opened for modification \??\c:\program files\ApproveDebug.wma rundll32.exe File opened for modification \??\c:\program files\CheckpointConvert.xsl rundll32.exe File opened for modification \??\c:\program files\EditSubmit.eprtx rundll32.exe File opened for modification \??\c:\program files\SplitReceive.ini rundll32.exe File opened for modification \??\c:\program files\EnterPush.asp rundll32.exe File opened for modification \??\c:\program files\ImportOptimize.tif rundll32.exe File opened for modification \??\c:\program files\InstallRemove.xlsm rundll32.exe File opened for modification \??\c:\program files\SendAssert.au rundll32.exe File created \??\c:\program files (x86)\4870u42-readme.txt rundll32.exe File opened for modification \??\c:\program files\CompleteFind.html rundll32.exe File opened for modification \??\c:\program files\CompleteResize.ini rundll32.exe File created \??\c:\program files\4870u42-readme.txt rundll32.exe File opened for modification \??\c:\program files\SplitStop.dib rundll32.exe File opened for modification \??\c:\program files\StartSave.TS rundll32.exe File opened for modification \??\c:\program files\ShowOut.DVR rundll32.exe File opened for modification \??\c:\program files\InvokePing.ADTS rundll32.exe File opened for modification \??\c:\program files\MeasureWatch.mp4v rundll32.exe File opened for modification \??\c:\program files\ReadInvoke.wav rundll32.exe File opened for modification \??\c:\program files\StepSend.mpe rundll32.exe File opened for modification \??\c:\program files\OpenClear.xlt rundll32.exe File opened for modification \??\c:\program files\PublishDisconnect.ppsx rundll32.exe File opened for modification \??\c:\program files\RestoreUnregister.asp rundll32.exe -
Suspicious behavior: EnumeratesProcesses 5 IoCs
Processes:
rundll32.exepowershell.exepid process 1248 rundll32.exe 1248 rundll32.exe 184 powershell.exe 184 powershell.exe 184 powershell.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes:
rundll32.exepowershell.exevssvc.exedescription pid process Token: SeDebugPrivilege 1248 rundll32.exe Token: SeDebugPrivilege 184 powershell.exe Token: SeBackupPrivilege 1372 vssvc.exe Token: SeRestorePrivilege 1372 vssvc.exe Token: SeAuditPrivilege 1372 vssvc.exe -
Suspicious use of WriteProcessMemory 5 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 580 wrote to memory of 1248 580 rundll32.exe rundll32.exe PID 580 wrote to memory of 1248 580 rundll32.exe rundll32.exe PID 580 wrote to memory of 1248 580 rundll32.exe rundll32.exe PID 1248 wrote to memory of 184 1248 rundll32.exe powershell.exe PID 1248 wrote to memory of 184 1248 rundll32.exe powershell.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\file.dll,#11⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\file.dll,#12⤵
- Modifies extensions of user files
- Enumerates connected drives
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -e RwBlAHQALQBXAG0AaQBPAGIAagBlAGMAdAAgAFcAaQBuADMAMgBfAFMAaABhAGQAbwB3AGMAbwBwAHkAIAB8ACAARgBvAHIARQBhAGMAaAAtAE8AYgBqAGUAYwB0ACAAewAkAF8ALgBEAGUAbABlAHQAZQAoACkAOwB9AA==3⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\wbem\unsecapp.exeC:\Windows\system32\wbem\unsecapp.exe -Embedding1⤵
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/184-1-0x0000000000000000-mapping.dmp
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memory/184-2-0x00007FF91E4E0000-0x00007FF91EECC000-memory.dmpFilesize
9.9MB
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memory/184-3-0x000001F7554B0000-0x000001F7554B1000-memory.dmpFilesize
4KB
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memory/184-4-0x000001F7560A0000-0x000001F7560A1000-memory.dmpFilesize
4KB
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memory/1248-0-0x0000000000000000-mapping.dmp