babuk | 1ee0514f19667ee09097843d95eed863d311e2887ba9910754eeeda29649948d

General

Target

e_win)multibabuk.exe
Size

79KB
MD5

ac9855d588b1415c2d8c7bd5d83cf00c
SHA1

c67386b8563aaa182d3bef4b683c1330a4fe84f2
SHA256

1ee0514f19667ee09097843d95eed863d311e2887ba9910754eeeda29649948d
SHA512

87563137f3a1310bc0bc8f5656d88714a2820e778bfe49294858443f1399c07e9631f653cf7078515595ef4c11f87c9e7b6872167b2bb4c0041b99040b79e6ce
SSDEEP

1536:/SkWBeGPGEbmsrQLOJgY8ZZP8LHD4XWaNH71dLdG1iiFM2iG2nsf:GBeBsmsrQLOJgY8Zp8LHD4XWaNH71dLc

Score

10^/10

babuk defense_evasion discovery execution impact ransomware

Malware Config

Signatures

Babuk Locker
RaaS first seen in 2021 initially called Vasa Locker.
ransomware babuk
Babuk family
babuk
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047
Renames multiple (159) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Enumerates connected drives 3 TTPs 23 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)	\??\Y:	e_win)multibabuk.exe
File opened (read-only)	\??\U:	e_win)multibabuk.exe
File opened (read-only)	\??\S:	e_win)multibabuk.exe
File opened (read-only)	\??\Z:	e_win)multibabuk.exe
File opened (read-only)	\??\X:	e_win)multibabuk.exe
File opened (read-only)	\??\R:	e_win)multibabuk.exe
File opened (read-only)	\??\I:	e_win)multibabuk.exe
File opened (read-only)	\??\K:	e_win)multibabuk.exe
File opened (read-only)	\??\B:	e_win)multibabuk.exe
File opened (read-only)	\??\M:	e_win)multibabuk.exe
File opened (read-only)	\??\Q:	e_win)multibabuk.exe
File opened (read-only)	\??\E:	e_win)multibabuk.exe
File opened (read-only)	\??\O:	e_win)multibabuk.exe
File opened (read-only)	\??\P:	e_win)multibabuk.exe
File opened (read-only)	\??\J:	e_win)multibabuk.exe
File opened (read-only)	\??\N:	e_win)multibabuk.exe
File opened (read-only)	\??\A:	e_win)multibabuk.exe
File opened (read-only)	\??\G:	e_win)multibabuk.exe
File opened (read-only)	\??\H:	e_win)multibabuk.exe
File opened (read-only)	\??\L:	e_win)multibabuk.exe
File opened (read-only)	\??\V:	e_win)multibabuk.exe
File opened (read-only)	\??\W:	e_win)multibabuk.exe
File opened (read-only)	\??\T:	e_win)multibabuk.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e_win)multibabuk.exe

Interacts with shadow copies 3 TTPs 2 IoCs

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

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
1732	vssadmin.exe
1508	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2456	e_win)multibabuk.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	2844	vssvc.exe
Token: SeRestorePrivilege	2844	vssvc.exe
Token: SeAuditPrivilege	2844	vssvc.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2456 wrote to memory of 2944	2456	e_win)multibabuk.exe	28
PID 2456 wrote to memory of 2944	2456	e_win)multibabuk.exe	28
PID 2456 wrote to memory of 2944	2456	e_win)multibabuk.exe	28
PID 2456 wrote to memory of 2944	2456	e_win)multibabuk.exe	28
PID 2944 wrote to memory of 1732	2944	cmd.exe	30
PID 2944 wrote to memory of 1732	2944	cmd.exe	30
PID 2944 wrote to memory of 1732	2944	cmd.exe	30
PID 2456 wrote to memory of 632	2456	e_win)multibabuk.exe	35
PID 2456 wrote to memory of 632	2456	e_win)multibabuk.exe	35
PID 2456 wrote to memory of 632	2456	e_win)multibabuk.exe	35
PID 2456 wrote to memory of 632	2456	e_win)multibabuk.exe	35
PID 632 wrote to memory of 1508	632	cmd.exe	37
PID 632 wrote to memory of 1508	632	cmd.exe	37
PID 632 wrote to memory of 1508	632	cmd.exe	37

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)multibabuk.exe
"C:\Users\Admin\AppData\Local\Temp\e_win)multibabuk.exe"
1⤵
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2456
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2944
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:1732
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:632
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:1508

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Windows Management Instrumentation

1

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

1

T1006

Indicator Removal

2

T1070

File Deletion

2

T1070.004

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

2

T1490

Replay Monitor

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Downloads

C:\Recovery\8490d022-e5e1-11ef-8fd8-4a893fa2fe1c\How To Restore Your Files.txt

Filesize
8KB

MD5
2af817219bb1d24a11ab839b9453b5f3

SHA1
f9ff9075f9472c41aeb93df2e439fe624dc143b0

SHA256
6a16454cad4534d51025f65277abaec0ff4a30082840154a35889445bb3ad0a0

SHA512
d443e149d8b097cc64b0bbbf65e3d660de43943a4b36ac4c41bfbdfe814fb895d7ba97128aa1235b85d2292b79afc451fbcb89cc6a56d33ecff7d93e18a15c30

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Analysis

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