Analysis Overview
SHA256
6103e26f6f9d5fd895d9c06e1f5e141ce74d8ebda999cda6a58a4393de5ed094
Threat Level: Known bad
The file plast.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 behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Interacts with shadow copies
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2021-04-30 17:57
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2021-04-30 17:57
Reported
2021-04-30 17:59
Platform
win7v20210408
Max time kernel
135s
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\RevokeSave.raw => C:\Users\Admin\Pictures\RevokeSave.raw.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\UseNew.tiff | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\UseNew.tiff => C:\Users\Admin\Pictures\UseNew.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ResolveSave.tiff => C:\Users\Admin\Pictures\ResolveSave.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SendJoin.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ResolveSave.tiff | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ExitTest.tif => C:\Users\Admin\Pictures\ExitTest.tif.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\GetWrite.png => C:\Users\Admin\Pictures\GetWrite.png.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ExitTest.tif.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SendJoin.tiff | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\RevokeSave.raw.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\UseNew.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\CompleteDeny.tif => C:\Users\Admin\Pictures\CompleteDeny.tif.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\GetWrite.png.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ResolveSave.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SearchSet.raw => C:\Users\Admin\Pictures\SearchSet.raw.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SearchSet.raw.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SendJoin.tiff => C:\Users\Admin\Pictures\SendJoin.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\CompleteDeny.tif.babyk | C:\Users\Admin\AppData\Local\Temp\plast.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\plast.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\plast.exe
"C:\Users\Admin\AppData\Local\Temp\plast.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/1948-59-0x0000000076691000-0x0000000076693000-memory.dmp
memory/1316-60-0x0000000000000000-mapping.dmp
memory/1248-61-0x0000000000000000-mapping.dmp
memory/336-62-0x0000000000000000-mapping.dmp
memory/1536-63-0x0000000000000000-mapping.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2021-04-30 17:57
Reported
2021-04-30 17:59
Platform
win10v20210410
Max time kernel
24s
Max time network
120s
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\ExpandInitialize.tif.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ReadEnable.tif => C:\Users\Admin\Pictures\ReadEnable.tif.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ReceiveWait.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ExpandInitialize.tif => C:\Users\Admin\Pictures\ExpandInitialize.tif.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ReceiveWait.tiff | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\CompareMerge.raw => C:\Users\Admin\Pictures\CompareMerge.raw.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\HideResize.raw.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\RestartComplete.tif => C:\Users\Admin\Pictures\RestartComplete.tif.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\UnblockStep.png => C:\Users\Admin\Pictures\UnblockStep.png.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\UnblockStep.png.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\CompareMerge.raw.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\HideResize.raw => C:\Users\Admin\Pictures\HideResize.raw.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ReadEnable.tif.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ReceiveWait.tiff => C:\Users\Admin\Pictures\ReceiveWait.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\plast.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\RestartComplete.tif.babyk | C:\Users\Admin\AppData\Local\Temp\plast.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\plast.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\plast.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 1892 wrote to memory of 1116 | N/A | C:\Users\Admin\AppData\Local\Temp\plast.exe | C:\Windows\System32\cmd.exe |
| PID 1892 wrote to memory of 1116 | N/A | C:\Users\Admin\AppData\Local\Temp\plast.exe | C:\Windows\System32\cmd.exe |
| PID 1116 wrote to memory of 1456 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 1116 wrote to memory of 1456 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 1892 wrote to memory of 3600 | N/A | C:\Users\Admin\AppData\Local\Temp\plast.exe | C:\Windows\System32\cmd.exe |
| PID 1892 wrote to memory of 3600 | N/A | C:\Users\Admin\AppData\Local\Temp\plast.exe | C:\Windows\System32\cmd.exe |
| PID 3600 wrote to memory of 2148 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 3600 wrote to memory of 2148 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\plast.exe
"C:\Users\Admin\AppData\Local\Temp\plast.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/1116-114-0x0000000000000000-mapping.dmp
memory/1456-115-0x0000000000000000-mapping.dmp
memory/3600-116-0x0000000000000000-mapping.dmp
memory/2148-117-0x0000000000000000-mapping.dmp