babuk | 45438e0d6a47a90beea24d4bb1d0a4387032a12a9b7d64b2e08986cbfb264406

General

Target

babyk/babyk.exe
Size

79KB
MD5

dd82341bde54c2d34496523a463d2771
SHA1

a193b2770d17a6405e92f6e28840e1b87db45356
SHA256

4b5438ad0818c9fe1e9aa6d43bca9ef0bced418365e71340e44dd3cc5a2ad54a
SHA512

c027bcc7ecd1761c6c4cbb32d528f40b123f80c6aa498c22e35aeddd064d4533fbf31fc93915bb29d5f3fc72811452fe988b9524ae01b3d630f5ccffc98525f8
SSDEEP

1536:rKkWBeG/vEbmsrQLOJgY8ZZP8LHD4XWaNH71dLdG1iiFM2iG2nsf:yBeQsmsrQLOJgY8Zp8LHD4XWaNH71dLc

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 19 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

babyk.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Pictures\ReadExit.crw.babyk	babyk.exe
File renamed	C:\Users\Admin\Pictures\ReceiveFormat.crw => C:\Users\Admin\Pictures\ReceiveFormat.crw.babyk	babyk.exe
File renamed	C:\Users\Admin\Pictures\ResumeSet.png => C:\Users\Admin\Pictures\ResumeSet.png.babyk	babyk.exe
File opened for modification	C:\Users\Admin\Pictures\StopCompress.png.babyk	babyk.exe
File renamed	C:\Users\Admin\Pictures\WriteRevoke.crw => C:\Users\Admin\Pictures\WriteRevoke.crw.babyk	babyk.exe
File renamed	C:\Users\Admin\Pictures\ResetLock.raw => C:\Users\Admin\Pictures\ResetLock.raw.babyk	babyk.exe
File opened for modification	C:\Users\Admin\Pictures\ReceiveFormat.crw.babyk	babyk.exe
File opened for modification	C:\Users\Admin\Pictures\ResumeSet.png.babyk	babyk.exe
File opened for modification	C:\Users\Admin\Pictures\DisableCopy.tiff	babyk.exe
File renamed	C:\Users\Admin\Pictures\DisableCopy.tiff => C:\Users\Admin\Pictures\DisableCopy.tiff.babyk	babyk.exe
File opened for modification	C:\Users\Admin\Pictures\DisableCopy.tiff.babyk	babyk.exe
File opened for modification	C:\Users\Admin\Pictures\OpenComplete.crw.babyk	babyk.exe
File opened for modification	C:\Users\Admin\Pictures\ReadConfirm.raw.babyk	babyk.exe
File renamed	C:\Users\Admin\Pictures\StopCompress.png => C:\Users\Admin\Pictures\StopCompress.png.babyk	babyk.exe
File opened for modification	C:\Users\Admin\Pictures\WriteRevoke.crw.babyk	babyk.exe
File renamed	C:\Users\Admin\Pictures\OpenComplete.crw => C:\Users\Admin\Pictures\OpenComplete.crw.babyk	babyk.exe
File renamed	C:\Users\Admin\Pictures\ReadConfirm.raw => C:\Users\Admin\Pictures\ReadConfirm.raw.babyk	babyk.exe
File renamed	C:\Users\Admin\Pictures\ReadExit.crw => C:\Users\Admin\Pictures\ReadExit.crw.babyk	babyk.exe
File opened for modification	C:\Users\Admin\Pictures\ResetLock.raw.babyk	babyk.exe

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

babyk.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation babyk.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	babyk.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:

babyk.exe

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

2592 vssadmin.exe
208 vssadmin.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

babyk.exe

pid process

3872 babyk.exe
3872 babyk.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 836 vssvc.exe
Token: SeRestorePrivilege 836 vssvc.exe
Token: SeAuditPrivilege 836 vssvc.exe

pid	process
2592	vssadmin.exe
208	vssadmin.exe

pid	process
3872	babyk.exe
3872	babyk.exe

description	pid	process
Token: SeBackupPrivilege	836	vssvc.exe
Token: SeRestorePrivilege	836	vssvc.exe
Token: SeAuditPrivilege	836	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

babyk.execmd.execmd.exe

description	pid	process	target process
PID 3872 wrote to memory of 1972	3872	babyk.exe	cmd.exe
PID 3872 wrote to memory of 1972	3872	babyk.exe	cmd.exe
PID 1972 wrote to memory of 2592	1972	cmd.exe	vssadmin.exe
PID 1972 wrote to memory of 2592	1972	cmd.exe	vssadmin.exe
PID 3872 wrote to memory of 4772	3872	babyk.exe	cmd.exe
PID 3872 wrote to memory of 4772	3872	babyk.exe	cmd.exe
PID 4772 wrote to memory of 208	4772	cmd.exe	vssadmin.exe
PID 4772 wrote to memory of 208	4772	cmd.exe	vssadmin.exe

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\babyk\babyk.exe
"C:\Users\Admin\AppData\Local\Temp\babyk\babyk.exe"
1⤵
- Modifies extensions of user files
- Checks computer location settings
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3872

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
2⤵
- Suspicious use of WriteProcessMemory
PID:1972

C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
3⤵
- Interacts with shadow copies
PID:2592

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
2⤵
- Suspicious use of WriteProcessMemory
PID:4772

C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
3⤵
- Interacts with shadow copies
PID:208

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:836

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File Deletion

2

T1107

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

2

T1490

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Downloads

C:\Users\Admin\How To Restore Your Files.txt

Filesize
8KB

MD5
2af817219bb1d24a11ab839b9453b5f3

SHA1
f9ff9075f9472c41aeb93df2e439fe624dc143b0

SHA256
6a16454cad4534d51025f65277abaec0ff4a30082840154a35889445bb3ad0a0

SHA512
d443e149d8b097cc64b0bbbf65e3d660de43943a4b36ac4c41bfbdfe814fb895d7ba97128aa1235b85d2292b79afc451fbcb89cc6a56d33ecff7d93e18a15c30

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Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads