babuk | 1e24560100d010c27cc19c59f9fe1531e4286ecb21fe53763165f30c5f58dc90

General

Target

e_win.exe
Size

79KB
MD5

92832ae49373b56748817cb5398ed706
SHA1

61e4505d605882b809d9c7f3dcbf163ff1678382
SHA256

1e24560100d010c27cc19c59f9fe1531e4286ecb21fe53763165f30c5f58dc90
SHA512

398ef0e5ffb6f914a2d1df23f12561153ef52ea28d345232cbb2daa84c43d1f1934be0c40d00b2502c2437c2733d0cdf75d24be6a8b47fc69648ad16c0bb4858

Score

10^/10

babuk ransomware

Malware Config

Signatures

Babuk Locker
RaaS first seen in 2021 initially called Vasa Locker.
ransomware babuk
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Modifies extensions of user files 18 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\StopPing.raw => C:\Users\Admin\Pictures\StopPing.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\StopPing.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\LimitSend.raw.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\RestoreDisconnect.crw => C:\Users\Admin\Pictures\RestoreDisconnect.crw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\CloseBlock.tiff.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\LimitSend.raw => C:\Users\Admin\Pictures\LimitSend.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\GroupUnregister.tiff	e_win.exe
File renamed	C:\Users\Admin\Pictures\GroupUnregister.tiff => C:\Users\Admin\Pictures\GroupUnregister.tiff.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\UnblockDebug.raw => C:\Users\Admin\Pictures\UnblockDebug.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\UnblockDebug.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\CloseBlock.tiff	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\CheckpointRename.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\RestoreDisconnect.crw.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\ConnectOut.png => C:\Users\Admin\Pictures\ConnectOut.png.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\ConnectOut.png.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\GroupUnregister.tiff.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\CheckpointRename.raw => C:\Users\Admin\Pictures\CheckpointRename.raw.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\CloseBlock.tiff => C:\Users\Admin\Pictures\CloseBlock.tiff.babyk	e_win.exe

Enumerates connected drives 3 TTPs 24 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\L:	e_win.exe
File opened (read-only)	\??\Z:	e_win.exe
File opened (read-only)	\??\W:	e_win.exe
File opened (read-only)	\??\E:	e_win.exe
File opened (read-only)	\??\P:	e_win.exe
File opened (read-only)	\??\S:	e_win.exe
File opened (read-only)	\??\F:	e_win.exe
File opened (read-only)	\??\G:	e_win.exe
File opened (read-only)	\??\X:	e_win.exe
File opened (read-only)	\??\R:	e_win.exe
File opened (read-only)	\??\T:	e_win.exe
File opened (read-only)	\??\I:	e_win.exe
File opened (read-only)	\??\H:	e_win.exe
File opened (read-only)	\??\J:	e_win.exe
File opened (read-only)	\??\B:	e_win.exe
File opened (read-only)	\??\Q:	e_win.exe
File opened (read-only)	\??\U:	e_win.exe
File opened (read-only)	\??\A:	e_win.exe
File opened (read-only)	\??\K:	e_win.exe
File opened (read-only)	\??\V:	e_win.exe
File opened (read-only)	\??\Y:	e_win.exe
File opened (read-only)	\??\O:	e_win.exe
File opened (read-only)	\??\N:	e_win.exe
File opened (read-only)	\??\M:	e_win.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Interacts with shadow copies 2 TTPs 2 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
4052	vssadmin.exe
2068	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
652	e_win.exe
652	e_win.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	3140	vssvc.exe
Token: SeRestorePrivilege	3140	vssvc.exe
Token: SeAuditPrivilege	3140	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 652 wrote to memory of 3200	652	e_win.exe	75
PID 652 wrote to memory of 3200	652	e_win.exe	75
PID 3200 wrote to memory of 4052	3200	cmd.exe	77
PID 3200 wrote to memory of 4052	3200	cmd.exe	77
PID 652 wrote to memory of 1184	652	e_win.exe	80
PID 652 wrote to memory of 1184	652	e_win.exe	80
PID 1184 wrote to memory of 2068	1184	cmd.exe	82
PID 1184 wrote to memory of 2068	1184	cmd.exe	82

C:\Users\Admin\AppData\Local\Temp\e_win.exe
"C:\Users\Admin\AppData\Local\Temp\e_win.exe"
1⤵
- Modifies extensions of user files
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:652
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3200
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:4052
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1184
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:2068