babuk | a3788d8cf37d691627bdbc5add07b598fdde66bdfcdb05299b0976715b392a61

Analysis

max time kernel
120s
max time network
146s
platform
windows10_x64
resource
win10-en-20211208
submitted
15-12-2021 06:21

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General

Target

1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
Size

79KB
MD5

38bf2b92a281f885e964a549575a5804
SHA1

0150c32d9de1fc49e8a2cd80031c561748e8cca7
SHA256

1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994
SHA512

99464b0867a297877eb88e0e322de1d4d613f75a2a420ea573e89a1798580f32ea0faac65752114223ff0ab684ae46fe4b0fcb629beb48077a949fac1ffe7d76

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 10 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Pictures\CompareReset.tif.babyk	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened for modification	C:\Users\Admin\Pictures\DenyRegister.crw.babyk	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File renamed	C:\Users\Admin\Pictures\ExpandReceive.raw => C:\Users\Admin\Pictures\ExpandReceive.raw.babyk	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened for modification	C:\Users\Admin\Pictures\ExpandReceive.raw.babyk	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File renamed	C:\Users\Admin\Pictures\UnlockCompress.crw => C:\Users\Admin\Pictures\UnlockCompress.crw.babyk	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File renamed	C:\Users\Admin\Pictures\CompareReset.tif => C:\Users\Admin\Pictures\CompareReset.tif.babyk	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File renamed	C:\Users\Admin\Pictures\DenyRegister.crw => C:\Users\Admin\Pictures\DenyRegister.crw.babyk	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File renamed	C:\Users\Admin\Pictures\ExpandInstall.png => C:\Users\Admin\Pictures\ExpandInstall.png.babyk	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened for modification	C:\Users\Admin\Pictures\ExpandInstall.png.babyk	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened for modification	C:\Users\Admin\Pictures\UnlockCompress.crw.babyk	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.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:

1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe

description	ioc	process
File opened (read-only)	\??\Q:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\P:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\A:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\H:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\W:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\E:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\Y:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\U:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\R:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\T:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\G:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\J:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\V:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\M:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\I:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\O:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\S:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\F:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\K:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\L:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\Z:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\X:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\B:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
File opened (read-only)	\??\N:	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.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

640 vssadmin.exe
1508 vssadmin.exe

pid	process
640	vssadmin.exe
1508	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe

pid	process
2704	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
2704	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 1492 vssvc.exe
Token: SeRestorePrivilege 1492 vssvc.exe
Token: SeAuditPrivilege 1492 vssvc.exe

description	pid	process
Token: SeBackupPrivilege	1492	vssvc.exe
Token: SeRestorePrivilege	1492	vssvc.exe
Token: SeAuditPrivilege	1492	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.execmd.execmd.exe

description	pid	process	target process
PID 2704 wrote to memory of 3264	2704	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe	cmd.exe
PID 2704 wrote to memory of 3264	2704	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe	cmd.exe
PID 3264 wrote to memory of 640	3264	cmd.exe	vssadmin.exe
PID 3264 wrote to memory of 640	3264	cmd.exe	vssadmin.exe
PID 2704 wrote to memory of 1716	2704	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe	cmd.exe
PID 2704 wrote to memory of 1716	2704	1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe	cmd.exe
PID 1716 wrote to memory of 1508	1716	cmd.exe	vssadmin.exe
PID 1716 wrote to memory of 1508	1716	cmd.exe	vssadmin.exe

C:\Users\Admin\AppData\Local\Temp\1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe
"C:\Users\Admin\AppData\Local\Temp\1d40f42fa328a9a6192d4fa8c6e5ce6f813ea9132774784521713b202d772994.exe"
1⤵
- Modifies extensions of user files
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2704

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
2⤵
- Suspicious use of WriteProcessMemory
PID:3264

C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
3⤵
- Interacts with shadow copies
PID:640

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
2⤵
- Suspicious use of WriteProcessMemory
PID:1716

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:1492

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File Deletion

T1107

Credential Access

Discovery

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

memory/640-119-0x0000000000000000-mapping.dmp

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memory/1508-121-0x0000000000000000-mapping.dmp

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memory/1716-120-0x0000000000000000-mapping.dmp

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memory/3264-118-0x0000000000000000-mapping.dmp

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