Analysis Overview
SHA256
6d4ced2e85587e81d6a09b147ec7cccc054bc0fbb92afc39586de1b2bf57f812
Threat Level: Known bad
The file system32.exe was found to be: Known bad.
Malicious Activity Summary
Babuk Locker
Deletes shadow copies
Modifies extensions of user files
Enumerates connected drives
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Interacts with shadow copies
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2021-05-01 21:57
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2021-05-01 21:57
Reported
2021-05-01 21:59
Platform
win7v20210410
Max time kernel
122s
Max time network
121s
Command Line
Signatures
Babuk Locker
Deletes shadow copies
Modifies extensions of user files
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\Pictures\WatchRename.raw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\WriteRename.png.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ExportUnpublish.raw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SaveOptimize.crw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ConvertResolve.crw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SaveOptimize.crw => C:\Users\Admin\Pictures\SaveOptimize.crw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\CloseWatch.crw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\InstallComplete.png.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ExportUnpublish.raw => C:\Users\Admin\Pictures\ExportUnpublish.raw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\InstallComplete.png => C:\Users\Admin\Pictures\InstallComplete.png.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\WatchRename.raw => C:\Users\Admin\Pictures\WatchRename.raw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\WriteRename.png => C:\Users\Admin\Pictures\WriteRename.png.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\CloseWatch.crw => C:\Users\Admin\Pictures\CloseWatch.crw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ConvertResolve.crw => C:\Users\Admin\Pictures\ConvertResolve.crw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
Enumerates connected drives
Enumerates physical storage devices
Interacts with shadow copies
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\vssadmin.exe | N/A |
| N/A | N/A | C:\Windows\system32\vssadmin.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeBackupPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeRestorePrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeAuditPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\system32.exe
"C:\Users\Admin\AppData\Local\Temp\system32.exe"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
Network
Files
memory/1616-60-0x0000000075631000-0x0000000075633000-memory.dmp
memory/1456-61-0x0000000000000000-mapping.dmp
memory/1928-62-0x0000000000000000-mapping.dmp
memory/756-63-0x0000000000000000-mapping.dmp
memory/1068-64-0x0000000000000000-mapping.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2021-05-01 21:57
Reported
2021-05-01 21:59
Platform
win10v20210408
Max time kernel
23s
Max time network
136s
Command Line
Signatures
Babuk Locker
Deletes shadow copies
Modifies extensions of user files
| Description | Indicator | Process | Target |
| File renamed | C:\Users\Admin\Pictures\CompareRevoke.tif => C:\Users\Admin\Pictures\CompareRevoke.tif.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\UnlockTest.png => C:\Users\Admin\Pictures\UnlockTest.png.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ShowDisconnect.tif.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\EnableUnlock.crw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\MergeSearch.tiff | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\MergeSearch.tiff => C:\Users\Admin\Pictures\MergeSearch.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\MergeTrace.raw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\OptimizeApprove.png.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\CompareRevoke.tif.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\EnableUnlock.crw => C:\Users\Admin\Pictures\EnableUnlock.crw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ClearConvertFrom.tif => C:\Users\Admin\Pictures\ClearConvertFrom.tif.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\UnlockTest.png.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\WaitPop.tif => C:\Users\Admin\Pictures\WaitPop.tif.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\WaitPop.tif.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\MergeSearch.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ClearConvertFrom.tif.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\MergeTrace.raw => C:\Users\Admin\Pictures\MergeTrace.raw.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\OptimizeApprove.png => C:\Users\Admin\Pictures\OptimizeApprove.png.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ShowDisconnect.tif => C:\Users\Admin\Pictures\ShowDisconnect.tif.babyk | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
Enumerates connected drives
Enumerates physical storage devices
Interacts with shadow copies
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\vssadmin.exe | N/A |
| N/A | N/A | C:\Windows\system32\vssadmin.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\system32.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeBackupPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeRestorePrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeAuditPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 640 wrote to memory of 3080 | N/A | C:\Users\Admin\AppData\Local\Temp\system32.exe | C:\Windows\System32\cmd.exe |
| PID 640 wrote to memory of 3080 | N/A | C:\Users\Admin\AppData\Local\Temp\system32.exe | C:\Windows\System32\cmd.exe |
| PID 3080 wrote to memory of 2716 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 3080 wrote to memory of 2716 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 640 wrote to memory of 864 | N/A | C:\Users\Admin\AppData\Local\Temp\system32.exe | C:\Windows\System32\cmd.exe |
| PID 640 wrote to memory of 864 | N/A | C:\Users\Admin\AppData\Local\Temp\system32.exe | C:\Windows\System32\cmd.exe |
| PID 864 wrote to memory of 2200 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 864 wrote to memory of 2200 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\system32.exe
"C:\Users\Admin\AppData\Local\Temp\system32.exe"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
Network
Files
memory/3080-114-0x0000000000000000-mapping.dmp
memory/2716-115-0x0000000000000000-mapping.dmp
memory/864-116-0x0000000000000000-mapping.dmp
memory/2200-117-0x0000000000000000-mapping.dmp