Analysis
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max time kernel
22s -
max time network
111s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
06-11-2020 07:03
Static task
static1
Behavioral task
behavioral1
Sample
as.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
as.exe
Resource
win10v20201028
General
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Target
as.exe
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Size
192KB
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MD5
beed14bc183ad523b94ef6ac2b270b08
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SHA1
4ea45e0d8a4d50182063cc97c8a86d579f3adf05
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SHA256
b10d9a62edb6081aa9f7fc865554064bb212555392b1181dc40040e12927f988
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SHA512
da74c44e21e120af26074fb6493a35067f037cc633e630b415d9b6947c9dc58e354fbb33afc87f733da8cd4d1f8ca66081df0e96d249ffb1c2ba8142c9317196
Malware Config
Extracted
C:\11tt7id9-readme.txt
sodinokibi
http://aplebzu47wgazapdqks6vrcv6zcnjppkbxbr6wketf56nf6aq2nmyoyd.onion/61773AFBBE4DF929
http://decryptor.cc/61773AFBBE4DF929
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 13 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
as.exedescription ioc process File renamed C:\Users\Admin\Pictures\AddImport.crw => \??\c:\users\admin\pictures\AddImport.crw.11tt7id9 as.exe File renamed C:\Users\Admin\Pictures\BlockMove.raw => \??\c:\users\admin\pictures\BlockMove.raw.11tt7id9 as.exe File renamed C:\Users\Admin\Pictures\DisableSuspend.tif => \??\c:\users\admin\pictures\DisableSuspend.tif.11tt7id9 as.exe File renamed C:\Users\Admin\Pictures\ReceiveEdit.raw => \??\c:\users\admin\pictures\ReceiveEdit.raw.11tt7id9 as.exe File renamed C:\Users\Admin\Pictures\ResolveResume.tif => \??\c:\users\admin\pictures\ResolveResume.tif.11tt7id9 as.exe File opened for modification \??\c:\users\admin\pictures\DisconnectResize.tiff as.exe File renamed C:\Users\Admin\Pictures\CloseMerge.raw => \??\c:\users\admin\pictures\CloseMerge.raw.11tt7id9 as.exe File renamed C:\Users\Admin\Pictures\CompressUnprotect.raw => \??\c:\users\admin\pictures\CompressUnprotect.raw.11tt7id9 as.exe File renamed C:\Users\Admin\Pictures\DisconnectResize.tiff => \??\c:\users\admin\pictures\DisconnectResize.tiff.11tt7id9 as.exe File renamed C:\Users\Admin\Pictures\MeasureReset.crw => \??\c:\users\admin\pictures\MeasureReset.crw.11tt7id9 as.exe File renamed C:\Users\Admin\Pictures\InvokeSwitch.tif => \??\c:\users\admin\pictures\InvokeSwitch.tif.11tt7id9 as.exe File renamed C:\Users\Admin\Pictures\SelectReceive.png => \??\c:\users\admin\pictures\SelectReceive.png.11tt7id9 as.exe File renamed C:\Users\Admin\Pictures\WaitStart.png => \??\c:\users\admin\pictures\WaitStart.png.11tt7id9 as.exe -
Enumerates connected drives 3 TTPs 25 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
as.exedescription ioc process File opened (read-only) \??\L: as.exe File opened (read-only) \??\Q: as.exe File opened (read-only) \??\X: as.exe File opened (read-only) \??\A: as.exe File opened (read-only) \??\H: as.exe File opened (read-only) \??\J: as.exe File opened (read-only) \??\M: as.exe File opened (read-only) \??\N: as.exe File opened (read-only) \??\O: as.exe File opened (read-only) \??\W: as.exe File opened (read-only) \??\Z: as.exe File opened (read-only) \??\B: as.exe File opened (read-only) \??\G: as.exe File opened (read-only) \??\K: as.exe File opened (read-only) \??\S: as.exe File opened (read-only) \??\T: as.exe File opened (read-only) \??\U: as.exe File opened (read-only) \??\Y: as.exe File opened (read-only) \??\F: as.exe File opened (read-only) \??\I: as.exe File opened (read-only) \??\R: as.exe File opened (read-only) \??\D: as.exe File opened (read-only) \??\E: as.exe File opened (read-only) \??\P: as.exe File opened (read-only) \??\V: as.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:
as.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\00p0.bmp" as.exe -
Drops file in Program Files directory 27 IoCs
Processes:
as.exedescription ioc process File opened for modification \??\c:\program files\ConvertFromRequest.mht as.exe File opened for modification \??\c:\program files\DebugSave.scf as.exe File opened for modification \??\c:\program files\DenyMeasure.m3u as.exe File opened for modification \??\c:\program files\RepairConfirm.gif as.exe File opened for modification \??\c:\program files\RestoreEdit.xhtml as.exe File opened for modification \??\c:\program files\SplitCopy.snd as.exe File opened for modification \??\c:\program files\InvokeConnect.cfg as.exe File opened for modification \??\c:\program files\JoinUninstall.zip as.exe File opened for modification \??\c:\program files\BackupSkip.jpg as.exe File created \??\c:\program files (x86)\11tt7id9-readme.txt as.exe File opened for modification \??\c:\program files\SubmitTest.avi as.exe File opened for modification \??\c:\program files\CompressUnblock.m4a as.exe File opened for modification \??\c:\program files\InvokeOpen.mpg as.exe File opened for modification \??\c:\program files\InvokeCompress.css as.exe File opened for modification \??\c:\program files\InvokeGroup.xltx as.exe File opened for modification \??\c:\program files\ResizeExpand.vsx as.exe File opened for modification \??\c:\program files\StopBackup.vstm as.exe File created \??\c:\program files\11tt7id9-readme.txt as.exe File opened for modification \??\c:\program files\ConvertSelect.DVR as.exe File opened for modification \??\c:\program files\ConvertSkip.ppt as.exe File opened for modification \??\c:\program files\MoveReceive.vssx as.exe File opened for modification \??\c:\program files\ProtectStep.ttf as.exe File opened for modification \??\c:\program files\RegisterUse.vb as.exe File opened for modification \??\c:\program files\RestoreSplit.rle as.exe File opened for modification \??\c:\program files\AssertResize.mpeg2 as.exe File opened for modification \??\c:\program files\GroupSearch.htm as.exe File opened for modification \??\c:\program files\MergeSwitch.css as.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
as.exepid process 4628 as.exe 4628 as.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes:
as.exevssvc.exedescription pid process Token: SeDebugPrivilege 4628 as.exe Token: SeTakeOwnershipPrivilege 4628 as.exe Token: SeBackupPrivilege 4188 vssvc.exe Token: SeRestorePrivilege 4188 vssvc.exe Token: SeAuditPrivilege 4188 vssvc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\as.exe"C:\Users\Admin\AppData\Local\Temp\as.exe"1⤵
- 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
PID:4628
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C:\Windows\system32\wbem\unsecapp.exeC:\Windows\system32\wbem\unsecapp.exe -Embedding1⤵PID:3292
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:4188