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 21 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

e_win.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Pictures\ResolveUnprotect.crw.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\SubmitSwitch.tif => C:\Users\Admin\Pictures\SubmitSwitch.tif.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\SubmitSwitch.tif.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\WatchComplete.crw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\EditSkip.tiff.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\WatchComplete.crw => C:\Users\Admin\Pictures\WatchComplete.crw.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\CompressSet.png => C:\Users\Admin\Pictures\CompressSet.png.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\ExpandInitialize.raw => C:\Users\Admin\Pictures\ExpandInitialize.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\JoinResume.tiff	e_win.exe
File renamed	C:\Users\Admin\Pictures\ImportRevoke.tiff => C:\Users\Admin\Pictures\ImportRevoke.tiff.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\ResolveUnprotect.crw => C:\Users\Admin\Pictures\ResolveUnprotect.crw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\CompressSet.png.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\ImportRevoke.tiff.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\JoinResume.tiff.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\UninstallOpen.tif => C:\Users\Admin\Pictures\UninstallOpen.tif.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\UninstallOpen.tif.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\EditSkip.tiff	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\ExpandInitialize.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\ImportRevoke.tiff	e_win.exe
File renamed	C:\Users\Admin\Pictures\EditSkip.tiff => C:\Users\Admin\Pictures\EditSkip.tiff.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\JoinResume.tiff => C:\Users\Admin\Pictures\JoinResume.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

Processes:

e_win.exe

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

Processes:

vssadmin.exevssadmin.exe

pid process

3748 vssadmin.exe
1016 vssadmin.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

e_win.exe

pid process

2764 e_win.exe
2764 e_win.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 3456 vssvc.exe
Token: SeRestorePrivilege 3456 vssvc.exe
Token: SeAuditPrivilege 3456 vssvc.exe

pid	process
3748	vssadmin.exe
1016	vssadmin.exe

pid	process
2764	e_win.exe
2764	e_win.exe

description	pid	process
Token: SeBackupPrivilege	3456	vssvc.exe
Token: SeRestorePrivilege	3456	vssvc.exe
Token: SeAuditPrivilege	3456	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

e_win.execmd.execmd.exe

description	pid	process	target process
PID 2764 wrote to memory of 2868	2764	e_win.exe	cmd.exe
PID 2764 wrote to memory of 2868	2764	e_win.exe	cmd.exe
PID 2868 wrote to memory of 3748	2868	cmd.exe	vssadmin.exe
PID 2868 wrote to memory of 3748	2868	cmd.exe	vssadmin.exe
PID 2764 wrote to memory of 2548	2764	e_win.exe	cmd.exe
PID 2764 wrote to memory of 2548	2764	e_win.exe	cmd.exe
PID 2548 wrote to memory of 1016	2548	cmd.exe	vssadmin.exe
PID 2548 wrote to memory of 1016	2548	cmd.exe	vssadmin.exe

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:2764
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2868
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:3748
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2548
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:1016