babuk | a3788d8cf37d691627bdbc5add07b598fdde66bdfcdb05299b0976715b392a61

Analysis

max time kernel
123s
max time network
138s
platform
windows10_x64
resource
win10-en-20211208
submitted
15-12-2021 06:21

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General

Target

1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
Size

79KB
MD5

ad44e77dff1efa05b990292b35f56b11
SHA1

f7d3fabf0f901908bb29aaa8dd13baded4c408f0
SHA256

1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238
SHA512

4bb500bcb9004e2dd1096ff664ab7e511d13ea1ce5a78fe39ce8e48eab4e2ed91a81823c449282caddc29ab06309927b3dece508fe606b8c6376ea88910e7e3f

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 12 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\ResolveUnregister.crw => C:\Users\Admin\Pictures\ResolveUnregister.crw.babyk	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File renamed	C:\Users\Admin\Pictures\AssertUnregister.png => C:\Users\Admin\Pictures\AssertUnregister.png.babyk	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened for modification	C:\Users\Admin\Pictures\AssertUnregister.png.babyk	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File renamed	C:\Users\Admin\Pictures\ConvertToStep.png => C:\Users\Admin\Pictures\ConvertToStep.png.babyk	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened for modification	C:\Users\Admin\Pictures\ConvertToStep.png.babyk	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File renamed	C:\Users\Admin\Pictures\CopyGet.tif => C:\Users\Admin\Pictures\CopyGet.tif.babyk	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened for modification	C:\Users\Admin\Pictures\CopyGet.tif.babyk	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File renamed	C:\Users\Admin\Pictures\CopyEdit.tif => C:\Users\Admin\Pictures\CopyEdit.tif.babyk	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened for modification	C:\Users\Admin\Pictures\CopyEdit.tif.babyk	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened for modification	C:\Users\Admin\Pictures\ResolveUnregister.crw.babyk	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File renamed	C:\Users\Admin\Pictures\UndoSend.png => C:\Users\Admin\Pictures\UndoSend.png.babyk	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened for modification	C:\Users\Admin\Pictures\UndoSend.png.babyk	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.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:

1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe

description	ioc	process
File opened (read-only)	\??\W:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\T:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\U:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\H:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\B:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\I:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\S:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\Z:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\V:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\G:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\J:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\L:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\R:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\O:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\A:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\F:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\K:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\X:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\N:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\M:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\Q:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\E:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\Y:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
File opened (read-only)	\??\P:	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.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

824 vssadmin.exe
3576 vssadmin.exe

pid	process
824	vssadmin.exe
3576	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe

pid	process
2556	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
2556	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 2032 vssvc.exe
Token: SeRestorePrivilege 2032 vssvc.exe
Token: SeAuditPrivilege 2032 vssvc.exe

description	pid	process
Token: SeBackupPrivilege	2032	vssvc.exe
Token: SeRestorePrivilege	2032	vssvc.exe
Token: SeAuditPrivilege	2032	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.execmd.execmd.exe

description	pid	process	target process
PID 2556 wrote to memory of 1104	2556	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe	cmd.exe
PID 2556 wrote to memory of 1104	2556	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe	cmd.exe
PID 1104 wrote to memory of 824	1104	cmd.exe	vssadmin.exe
PID 1104 wrote to memory of 824	1104	cmd.exe	vssadmin.exe
PID 2556 wrote to memory of 1568	2556	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe	cmd.exe
PID 2556 wrote to memory of 1568	2556	1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe	cmd.exe
PID 1568 wrote to memory of 3576	1568	cmd.exe	vssadmin.exe
PID 1568 wrote to memory of 3576	1568	cmd.exe	vssadmin.exe

C:\Users\Admin\AppData\Local\Temp\1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe
"C:\Users\Admin\AppData\Local\Temp\1ab45a508da655ef755ad4394f869c664f664b3ac111875704a583e9485f2238.exe"
1⤵
- Modifies extensions of user files
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2556

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
2⤵
- Suspicious use of WriteProcessMemory
PID:1104

C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
3⤵
- Interacts with shadow copies
PID:824

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
2⤵
- Suspicious use of WriteProcessMemory
PID:1568

C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
3⤵
- Interacts with shadow copies
PID:3576

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2032

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/824-116-0x0000000000000000-mapping.dmp

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memory/1104-115-0x0000000000000000-mapping.dmp

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memory/1568-117-0x0000000000000000-mapping.dmp

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memory/3576-118-0x0000000000000000-mapping.dmp

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