babuk | 10843ab4b6e4c9592a31a72bc5f7ccfa48fd365e6fba1b100319f40125f8da6f

General

Target

e_win.exe
Size

79KB
MD5

3c070554f9b588ac31e317be5d5f5120
SHA1

43ff7548df9f8597a4a0e8af82fb75ad622f6750
SHA256

10843ab4b6e4c9592a31a72bc5f7ccfa48fd365e6fba1b100319f40125f8da6f
SHA512

9eab16bd98efdb908902bc7303962dfa645248c411a407234ba03c7bd75cd8909cd41902e4a50847677d6e42c20a10e98cbb0d57f31a11f60d3eb05936ab334b
SSDEEP

1536:m6UhZM4hubesrQLOJgY8ZZP8LHD4XWaNH71dLdG1iiFM2iG2zs4:ghZ5YesrQLOJgY8Zp8LHD4XWaNH71dLI

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 16 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File opened for modification	C:\Users\Admin\Pictures\WaitMeasure.tif.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\ImportAdd.raw => C:\Users\Admin\Pictures\ImportAdd.raw.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\ResolveRedo.tif => C:\Users\Admin\Pictures\ResolveRedo.tif.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\WaitMeasure.tif => C:\Users\Admin\Pictures\WaitMeasure.tif.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\ResizeDisable.png => C:\Users\Admin\Pictures\ResizeDisable.png.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\ResolveRedo.tif.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\LockApprove.tif => C:\Users\Admin\Pictures\LockApprove.tif.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\RevokeRename.png => C:\Users\Admin\Pictures\RevokeRename.png.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\LockApprove.tif.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\ResizeDisable.png.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\CheckpointSend.raw => C:\Users\Admin\Pictures\CheckpointSend.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\CheckpointSend.raw.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\CopyConfirm.crw => C:\Users\Admin\Pictures\CopyConfirm.crw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\CopyConfirm.crw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\ImportAdd.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\RevokeRename.png.babyk	e_win.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	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)	\??\Q:	e_win.exe
File opened (read-only)	\??\E:	e_win.exe
File opened (read-only)	\??\O:	e_win.exe
File opened (read-only)	\??\G:	e_win.exe
File opened (read-only)	\??\Z:	e_win.exe
File opened (read-only)	\??\B:	e_win.exe
File opened (read-only)	\??\R:	e_win.exe
File opened (read-only)	\??\U:	e_win.exe
File opened (read-only)	\??\P:	e_win.exe
File opened (read-only)	\??\F:	e_win.exe
File opened (read-only)	\??\J:	e_win.exe
File opened (read-only)	\??\X:	e_win.exe
File opened (read-only)	\??\T:	e_win.exe
File opened (read-only)	\??\A:	e_win.exe
File opened (read-only)	\??\K:	e_win.exe
File opened (read-only)	\??\N:	e_win.exe
File opened (read-only)	\??\M:	e_win.exe
File opened (read-only)	\??\W:	e_win.exe
File opened (read-only)	\??\Y:	e_win.exe
File opened (read-only)	\??\I:	e_win.exe
File opened (read-only)	\??\S:	e_win.exe
File opened (read-only)	\??\H:	e_win.exe
File opened (read-only)	\??\L:	e_win.exe
File opened (read-only)	\??\V:	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
4696	vssadmin.exe
1276	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3440	e_win.exe
3440	e_win.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	3416	vssvc.exe
Token: SeRestorePrivilege	3416	vssvc.exe
Token: SeAuditPrivilege	3416	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3440 wrote to memory of 2324	3440	e_win.exe	85
PID 3440 wrote to memory of 2324	3440	e_win.exe	85
PID 2324 wrote to memory of 4696	2324	cmd.exe	88
PID 2324 wrote to memory of 4696	2324	cmd.exe	88
PID 3440 wrote to memory of 2076	3440	e_win.exe	91
PID 3440 wrote to memory of 2076	3440	e_win.exe	91
PID 2076 wrote to memory of 1276	2076	cmd.exe	93
PID 2076 wrote to memory of 1276	2076	cmd.exe	93

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\e_win.exe
"C:\Users\Admin\AppData\Local\Temp\e_win.exe"
1⤵
- Modifies extensions of user files
- Checks computer location settings
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3440
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2324
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:4696
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2076
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:1276

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3416

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:\Recovery\How To Restore Your Files.txt

Filesize
4B

MD5
1cb251ec0d568de6a929b520c4aed8d1

SHA1
372ea08cab33e71c02c651dbc83a474d32c676ea

SHA256
982d9e3eb996f559e633f4d194def3761d909f5a3b647d1a851fead67c32c9d1

SHA512
eaf2c12742cb8c161bcbd84b032b9bb98999a23282542672ca01cc6edd268f7dce9987ad6b2bc79305634f89d90b90102bcd59a57e7135b8e3ceb93c0597117b

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads