Analysis
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max time kernel
1734s -
max time network
1806s -
platform
windows7_x64 -
resource
win7v20210408 -
submitted
23-08-2021 11:13
Static task
static1
Behavioral task
behavioral1
Sample
892083cb3f064e9434df593bfdf6f00e48ab68778bfca8d9a64d697d5d19fe5f.dll
Resource
win7v20210408
Behavioral task
behavioral2
Sample
892083cb3f064e9434df593bfdf6f00e48ab68778bfca8d9a64d697d5d19fe5f.dll
Resource
win10v20210410
General
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Target
892083cb3f064e9434df593bfdf6f00e48ab68778bfca8d9a64d697d5d19fe5f.dll
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Size
119KB
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MD5
52d280d45daba695a565e25cdd2863d8
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SHA1
60c525e2a52137514d3dfa72e8a49a0d4da98759
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SHA256
892083cb3f064e9434df593bfdf6f00e48ab68778bfca8d9a64d697d5d19fe5f
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SHA512
8304713277dddc0e9f899d3f91b1a8e33fb654945bd71f45185dcfee70a681df337d53df891272003ec93827aa2d5db77a9c652a3253409fe65b42c368a55701
Malware Config
Extracted
C:\o2cb495rx-read-me-KRBL.txt
sodinokibi
http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/E491EFEEBAD66778
http://decoder.re/E491EFEEBAD66778
Signatures
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Sodin,Sodinokibi,REvil
Ransomware with advanced anti-analysis and privilege escalation functionality.
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suricata: ET MALWARE Known Sinkhole Response Header
suricata: ET MALWARE Known Sinkhole Response Header
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Modifies extensions of user files 5 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
regsvr32.exedescription ioc process File opened for modification \??\c:\users\admin\pictures\LimitTest.tiff regsvr32.exe File renamed C:\Users\Admin\Pictures\LimitTest.tiff => \??\c:\users\admin\pictures\LimitTest.tiff.o2cb495rx regsvr32.exe File renamed C:\Users\Admin\Pictures\RepairWait.tif => \??\c:\users\admin\pictures\RepairWait.tif.o2cb495rx regsvr32.exe File renamed C:\Users\Admin\Pictures\ResumeOptimize.crw => \??\c:\users\admin\pictures\ResumeOptimize.crw.o2cb495rx regsvr32.exe File renamed C:\Users\Admin\Pictures\LimitDisable.raw => \??\c:\users\admin\pictures\LimitDisable.raw.o2cb495rx regsvr32.exe -
Enumerates connected drives 3 TTPs 25 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
regsvr32.exedescription ioc process File opened (read-only) \??\E: regsvr32.exe File opened (read-only) \??\F: regsvr32.exe File opened (read-only) \??\J: regsvr32.exe File opened (read-only) \??\P: regsvr32.exe File opened (read-only) \??\Z: regsvr32.exe File opened (read-only) \??\A: regsvr32.exe File opened (read-only) \??\G: regsvr32.exe File opened (read-only) \??\H: regsvr32.exe File opened (read-only) \??\I: regsvr32.exe File opened (read-only) \??\K: regsvr32.exe File opened (read-only) \??\V: regsvr32.exe File opened (read-only) \??\M: regsvr32.exe File opened (read-only) \??\O: regsvr32.exe File opened (read-only) \??\Q: regsvr32.exe File opened (read-only) \??\Y: regsvr32.exe File opened (read-only) \??\B: regsvr32.exe File opened (read-only) \??\L: regsvr32.exe File opened (read-only) \??\N: regsvr32.exe File opened (read-only) \??\R: regsvr32.exe File opened (read-only) \??\S: regsvr32.exe File opened (read-only) \??\T: regsvr32.exe File opened (read-only) \??\U: regsvr32.exe File opened (read-only) \??\W: regsvr32.exe File opened (read-only) \??\X: regsvr32.exe File opened (read-only) \??\D: regsvr32.exe -
Drops file in System32 directory 1 IoCs
Processes:
regsvr32.exedescription ioc process File opened for modification C:\Windows\System32\CatRoot2\dberr.txt regsvr32.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
regsvr32.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\7egw9j.bmp" regsvr32.exe -
Drops file in Program Files directory 20 IoCs
Processes:
regsvr32.exedescription ioc process File opened for modification \??\c:\program files\CompressUse.wvx regsvr32.exe File opened for modification \??\c:\program files\CopyRedo.png regsvr32.exe File opened for modification \??\c:\program files\DismountCompare.iso regsvr32.exe File opened for modification \??\c:\program files\MergeUpdate.ps1xml regsvr32.exe File opened for modification \??\c:\program files\OutUnlock.asx regsvr32.exe File opened for modification \??\c:\program files\RequestSuspend.vstx regsvr32.exe File created \??\c:\program files (x86)\o2cb495rx-read-me-KRBL.txt regsvr32.exe File opened for modification \??\c:\program files\ApproveSplit.M2V regsvr32.exe File opened for modification \??\c:\program files\StartImport.vssx regsvr32.exe File opened for modification \??\c:\program files\UndoReceive.dwg regsvr32.exe File created \??\c:\program files (x86)\microsoft sql server compact edition\v3.5\o2cb495rx-read-me-KRBL.txt regsvr32.exe File created \??\c:\program files\o2cb495rx-read-me-KRBL.txt regsvr32.exe File opened for modification \??\c:\program files\AddPing.ogg regsvr32.exe File opened for modification \??\c:\program files\SetHide.aiff regsvr32.exe File opened for modification \??\c:\program files\SetInvoke.xlsx regsvr32.exe File opened for modification \??\c:\program files\StartOpen.iso regsvr32.exe File created \??\c:\program files (x86)\microsoft sql server compact edition\o2cb495rx-read-me-KRBL.txt regsvr32.exe File created \??\c:\program files (x86)\microsoft sql server compact edition\v3.5\desktop\o2cb495rx-read-me-KRBL.txt regsvr32.exe File opened for modification \??\c:\program files\CloseDisable.vstm regsvr32.exe File opened for modification \??\c:\program files\GroupRequest.jpg regsvr32.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
regsvr32.exepid process 1196 regsvr32.exe 1196 regsvr32.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes:
regsvr32.exevssvc.exedescription pid process Token: SeDebugPrivilege 1196 regsvr32.exe Token: SeTakeOwnershipPrivilege 1196 regsvr32.exe Token: SeBackupPrivilege 612 vssvc.exe Token: SeRestorePrivilege 612 vssvc.exe Token: SeAuditPrivilege 612 vssvc.exe -
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
regsvr32.exedescription pid process target process PID 880 wrote to memory of 1196 880 regsvr32.exe regsvr32.exe PID 880 wrote to memory of 1196 880 regsvr32.exe regsvr32.exe PID 880 wrote to memory of 1196 880 regsvr32.exe regsvr32.exe PID 880 wrote to memory of 1196 880 regsvr32.exe regsvr32.exe PID 880 wrote to memory of 1196 880 regsvr32.exe regsvr32.exe PID 880 wrote to memory of 1196 880 regsvr32.exe regsvr32.exe PID 880 wrote to memory of 1196 880 regsvr32.exe regsvr32.exe
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\892083cb3f064e9434df593bfdf6f00e48ab68778bfca8d9a64d697d5d19fe5f.dll1⤵
- Suspicious use of WriteProcessMemory
PID:880 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\892083cb3f064e9434df593bfdf6f00e48ab68778bfca8d9a64d697d5d19fe5f.dll2⤵
- Modifies extensions of user files
- Enumerates connected drives
- Drops file in System32 directory
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1196
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C:\Windows\system32\wbem\unsecapp.exeC:\Windows\system32\wbem\unsecapp.exe -Embedding1⤵PID:1292
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:612