Analysis Overview
SHA256
c94a81fdf688d220827320e88cc0b89af8690142abe5c602131b6659297c7d24
Threat Level: Known bad
The file crypto.exe.unsafe 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
2021-10-12 21:15
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2021-10-12 21:15
Reported
2021-10-12 21:17
Platform
win7-en-20210920
Max time kernel
118s
Max time network
117s
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\ConnectSplit.raw.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\MergeRename.tiff => C:\Users\Admin\Pictures\MergeRename.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\MergeRename.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SubmitTrace.tif => C:\Users\Admin\Pictures\SubmitTrace.tif.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SubmitTrace.tif.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\MergeRename.tiff | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ConnectSplit.raw => C:\Users\Admin\Pictures\ConnectSplit.raw.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.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\crypto.exe.unsafe.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\crypto.exe.unsafe.exe
"C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.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/1424-54-0x000000000058B000-0x000000000059C000-memory.dmp
memory/1424-55-0x0000000076201000-0x0000000076203000-memory.dmp
memory/1424-56-0x0000000000220000-0x0000000000235000-memory.dmp
memory/1424-57-0x0000000000400000-0x0000000000455000-memory.dmp
memory/836-58-0x0000000000000000-mapping.dmp
memory/1360-59-0x0000000000000000-mapping.dmp
memory/1460-60-0x0000000000000000-mapping.dmp
memory/872-61-0x0000000000000000-mapping.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2021-10-12 21:15
Reported
2021-10-12 21:17
Platform
win10v20210408
Max time kernel
41s
Max time network
116s
Command Line
Signatures
Babuk Locker
Deletes shadow copies
Modifies extensions of user files
| Description | Indicator | Process | Target |
| File renamed | C:\Users\Admin\Pictures\CopyRemove.tif => C:\Users\Admin\Pictures\CopyRemove.tif.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\LockHide.crw.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SendRename.tiff | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SplitRead.raw.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ApproveWait.crw => C:\Users\Admin\Pictures\ApproveWait.crw.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\CopyRemove.tif.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ImportSubmit.crw.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\InitializeConvert.tif.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\InstallSearch.png.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SyncExport.tiff | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SyncExport.tiff => C:\Users\Admin\Pictures\SyncExport.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\UpdateRegister.png.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\DisableMove.tif => C:\Users\Admin\Pictures\DisableMove.tif.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ImportSubmit.crw => C:\Users\Admin\Pictures\ImportSubmit.crw.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\InitializeConvert.tif => C:\Users\Admin\Pictures\InitializeConvert.tif.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\InstallSearch.png => C:\Users\Admin\Pictures\InstallSearch.png.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SendRename.tiff => C:\Users\Admin\Pictures\SendRename.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\UpdateRegister.png => C:\Users\Admin\Pictures\UpdateRegister.png.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ApproveWait.crw.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\LockHide.crw => C:\Users\Admin\Pictures\LockHide.crw.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SendRename.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SplitRead.raw => C:\Users\Admin\Pictures\SplitRead.raw.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SyncExport.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\DisableMove.tif.babyk | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.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\crypto.exe.unsafe.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.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 568 wrote to memory of 376 | N/A | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | C:\Windows\System32\cmd.exe |
| PID 568 wrote to memory of 376 | N/A | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | C:\Windows\System32\cmd.exe |
| PID 376 wrote to memory of 1908 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 376 wrote to memory of 1908 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 568 wrote to memory of 2700 | N/A | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | C:\Windows\System32\cmd.exe |
| PID 568 wrote to memory of 2700 | N/A | C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe | C:\Windows\System32\cmd.exe |
| PID 2700 wrote to memory of 3828 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 2700 wrote to memory of 3828 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.exe
"C:\Users\Admin\AppData\Local\Temp\crypto.exe.unsafe.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
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | time.windows.com | udp |
| NL | 20.101.57.9:123 | time.windows.com | udp |
Files
memory/568-115-0x00000000001D0000-0x00000000001E5000-memory.dmp
memory/568-116-0x0000000000400000-0x0000000000455000-memory.dmp
memory/376-117-0x0000000000000000-mapping.dmp
memory/1908-118-0x0000000000000000-mapping.dmp
memory/2700-119-0x0000000000000000-mapping.dmp
memory/3828-120-0x0000000000000000-mapping.dmp