babuk | 82e560a078cd7bb4472d5af832a04c4bc8f1001bac97b1574efe9863d3f66550

General

Target

e_win.exe
Size

79KB
MD5

e5adc80639046a5c69bcfeee458e0833
SHA1

d9e3f9edda5df290b5be6fb1d335b750dd7c6758
SHA256

ea95f131bd9b49104d9e7ae83335254549ded9d71d557c6e4746740aecca2c85
SHA512

c11a24e14ba5fa2b0e2c2b544dd4218ce4c8caae3db7cebd5b0305223f96bde09c9bd237cb8d32768f30118f7be73240971e772f7a89db7c0fba5c6105107e3a
SSDEEP

1536:H6UhZM4hubesrQLOJgY8ZZP8LHD4XWaNH71dLdG1iiFM2iG2zs4:7hZ5YesrQLOJgY8Zp8LHD4XWaNH71dLI

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 (137) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

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-1-5-21-2645532622-3298555945-705856666-1000\Control Panel\International\Geo\Nation	e_win.exe

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)	\??\Z:	e_win.exe
File opened (read-only)	\??\N:	e_win.exe
File opened (read-only)	\??\R:	e_win.exe
File opened (read-only)	\??\A:	e_win.exe
File opened (read-only)	\??\H:	e_win.exe
File opened (read-only)	\??\B:	e_win.exe
File opened (read-only)	\??\I:	e_win.exe
File opened (read-only)	\??\O:	e_win.exe
File opened (read-only)	\??\G:	e_win.exe
File opened (read-only)	\??\M:	e_win.exe
File opened (read-only)	\??\Y:	e_win.exe
File opened (read-only)	\??\P:	e_win.exe
File opened (read-only)	\??\S:	e_win.exe
File opened (read-only)	\??\J:	e_win.exe
File opened (read-only)	\??\K:	e_win.exe
File opened (read-only)	\??\L:	e_win.exe
File opened (read-only)	\??\X:	e_win.exe
File opened (read-only)	\??\V:	e_win.exe
File opened (read-only)	\??\Q:	e_win.exe
File opened (read-only)	\??\W:	e_win.exe
File opened (read-only)	\??\E:	e_win.exe
File opened (read-only)	\??\T:	e_win.exe
File opened (read-only)	\??\U:	e_win.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.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
4576	vssadmin.exe
4024	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4212	e_win.exe
4212	e_win.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	3628	vssvc.exe
Token: SeRestorePrivilege	3628	vssvc.exe
Token: SeAuditPrivilege	3628	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4212 wrote to memory of 3392	4212	e_win.exe	87
PID 4212 wrote to memory of 3392	4212	e_win.exe	87
PID 3392 wrote to memory of 4576	3392	cmd.exe	91
PID 3392 wrote to memory of 4576	3392	cmd.exe	91
PID 4212 wrote to memory of 1160	4212	e_win.exe	92
PID 4212 wrote to memory of 1160	4212	e_win.exe	92
PID 1160 wrote to memory of 4024	1160	cmd.exe	96
PID 1160 wrote to memory of 4024	1160	cmd.exe	96

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⤵
- Checks computer location settings
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4212
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3392
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:4576
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1160
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:4024

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3628

Network

MITRE ATT&CK Enterprise v16

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

3

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

Loading Replay Monitor...

Downloads

C:\PerfLogs\How To Restore Your Files.txt

Filesize
8KB

MD5
2af817219bb1d24a11ab839b9453b5f3

SHA1
f9ff9075f9472c41aeb93df2e439fe624dc143b0

SHA256
6a16454cad4534d51025f65277abaec0ff4a30082840154a35889445bb3ad0a0

SHA512
d443e149d8b097cc64b0bbbf65e3d660de43943a4b36ac4c41bfbdfe814fb895d7ba97128aa1235b85d2292b79afc451fbcb89cc6a56d33ecff7d93e18a15c30

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads