Analysis Overview
SHA256
bb31f235e86b0fda185e6580ef5327f80d6a6c754f78499e8647de5e229769cc
Threat Level: Known bad
The file l.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
Interacts with shadow copies
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2021-04-16 00:36
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2021-04-16 00:36
Reported
2021-04-16 00:38
Platform
win7v20210408
Max time kernel
33s
Max time network
34s
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\LimitTest.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ResumeOptimize.crw => C:\Users\Admin\Pictures\ResumeOptimize.crw.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ResumeOptimize.crw.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\RepairWait.tif => C:\Users\Admin\Pictures\RepairWait.tif.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\LimitTest.tiff | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\LimitDisable.raw => C:\Users\Admin\Pictures\LimitDisable.raw.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\LimitDisable.raw.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\LimitTest.tiff => C:\Users\Admin\Pictures\LimitTest.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\RepairWait.tif.babyk | C:\Users\Admin\AppData\Local\Temp\l.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\l.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\l.exe
"C:\Users\Admin\AppData\Local\Temp\l.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/1028-60-0x0000000075801000-0x0000000075803000-memory.dmp
memory/2020-61-0x0000000000000000-mapping.dmp
memory/1284-62-0x0000000000000000-mapping.dmp
memory/512-63-0x0000000000000000-mapping.dmp
memory/1004-64-0x0000000000000000-mapping.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2021-04-16 00:36
Reported
2021-04-16 00:38
Platform
win10v20210410
Max time kernel
14s
Max time network
110s
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\MountEdit.tif.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\StartUninstall.tiff | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\StartUninstall.tiff => C:\Users\Admin\Pictures\StartUninstall.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ConvertFromUpdate.raw => C:\Users\Admin\Pictures\ConvertFromUpdate.raw.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ConvertFromUpdate.raw.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\MountEdit.tif => C:\Users\Admin\Pictures\MountEdit.tif.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\MountRead.tif => C:\Users\Admin\Pictures\MountRead.tif.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\MountRead.tif.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SaveRequest.raw => C:\Users\Admin\Pictures\SaveRequest.raw.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SaveRequest.raw.babyk | C:\Users\Admin\AppData\Local\Temp\l.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\StartUninstall.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\l.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\l.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\l.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 3968 wrote to memory of 1612 | N/A | C:\Users\Admin\AppData\Local\Temp\l.exe | C:\Windows\System32\cmd.exe |
| PID 3968 wrote to memory of 1612 | N/A | C:\Users\Admin\AppData\Local\Temp\l.exe | C:\Windows\System32\cmd.exe |
| PID 3968 wrote to memory of 2684 | N/A | C:\Users\Admin\AppData\Local\Temp\l.exe | C:\Windows\System32\cmd.exe |
| PID 3968 wrote to memory of 2684 | N/A | C:\Users\Admin\AppData\Local\Temp\l.exe | C:\Windows\System32\cmd.exe |
| PID 1612 wrote to memory of 1316 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 1612 wrote to memory of 1316 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 2684 wrote to memory of 408 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 2684 wrote to memory of 408 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\l.exe
"C:\Users\Admin\AppData\Local\Temp\l.exe"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
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\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
Network
Files
memory/1612-114-0x0000000000000000-mapping.dmp
memory/2684-115-0x0000000000000000-mapping.dmp
memory/1316-116-0x0000000000000000-mapping.dmp
memory/408-117-0x0000000000000000-mapping.dmp