babuk | a3788d8cf37d691627bdbc5add07b598fdde66bdfcdb05299b0976715b392a61

Analysis

max time kernel
124s
max time network
136s
platform
windows10_x64
resource
win10-en-20211208
submitted
15-12-2021 06:21

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General

Target

15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
Size

79KB
MD5

075951011cd90b9d7b202d7aa45fda8e
SHA1

19043c94c4b99ccd26aeed37236e534cf15a37ef
SHA256

15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3
SHA512

e782c80568a7424eabf2f725d90ecc861dd5d23f31812227e3bb1b00897f659c864e38d768359dcb6965012f5dd4da2cc37bad28a071cabce9e77317f717ad84

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:

15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Pictures\DisconnectAssert.tif.babyk	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File renamed	C:\Users\Admin\Pictures\CompressStep.raw => C:\Users\Admin\Pictures\CompressStep.raw.babyk	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File renamed	C:\Users\Admin\Pictures\BlockExport.crw => C:\Users\Admin\Pictures\BlockExport.crw.babyk	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File renamed	C:\Users\Admin\Pictures\CheckpointFind.raw => C:\Users\Admin\Pictures\CheckpointFind.raw.babyk	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened for modification	C:\Users\Admin\Pictures\BlockExport.crw.babyk	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File renamed	C:\Users\Admin\Pictures\RequestRename.tif => C:\Users\Admin\Pictures\RequestRename.tif.babyk	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened for modification	C:\Users\Admin\Pictures\RequestRename.tif.babyk	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened for modification	C:\Users\Admin\Pictures\CheckpointFind.raw.babyk	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File renamed	C:\Users\Admin\Pictures\DisconnectAssert.tif => C:\Users\Admin\Pictures\DisconnectAssert.tif.babyk	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened for modification	C:\Users\Admin\Pictures\CompressStep.raw.babyk	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.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:

15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe

description	ioc	process
File opened (read-only)	\??\U:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\I:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\S:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\V:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\M:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\Z:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\Q:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\W:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\T:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\Y:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\O:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\F:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\L:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\A:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\G:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\H:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\J:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\K:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\B:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\E:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\R:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\P:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\X:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
File opened (read-only)	\??\N:	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.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

864 vssadmin.exe
1364 vssadmin.exe

pid	process
864	vssadmin.exe
1364	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe

pid	process
2756	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
2756	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 3944 vssvc.exe
Token: SeRestorePrivilege 3944 vssvc.exe
Token: SeAuditPrivilege 3944 vssvc.exe

description	pid	process
Token: SeBackupPrivilege	3944	vssvc.exe
Token: SeRestorePrivilege	3944	vssvc.exe
Token: SeAuditPrivilege	3944	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.execmd.execmd.exe

description	pid	process	target process
PID 2756 wrote to memory of 1352	2756	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe	cmd.exe
PID 2756 wrote to memory of 1352	2756	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe	cmd.exe
PID 1352 wrote to memory of 864	1352	cmd.exe	vssadmin.exe
PID 1352 wrote to memory of 864	1352	cmd.exe	vssadmin.exe
PID 2756 wrote to memory of 920	2756	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe	cmd.exe
PID 2756 wrote to memory of 920	2756	15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe	cmd.exe
PID 920 wrote to memory of 1364	920	cmd.exe	vssadmin.exe
PID 920 wrote to memory of 1364	920	cmd.exe	vssadmin.exe

C:\Users\Admin\AppData\Local\Temp\15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe
"C:\Users\Admin\AppData\Local\Temp\15656e1825383c4749fadcc46f9825df6262ca2f1f98d895d64c840febe3d9d3.exe"
1⤵
- Modifies extensions of user files
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2756

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
2⤵
- Suspicious use of WriteProcessMemory
PID:1352

C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
3⤵
- Interacts with shadow copies
PID:864

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
2⤵
- Suspicious use of WriteProcessMemory
PID:920

C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
3⤵
- Interacts with shadow copies
PID:1364

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3944

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/864-119-0x0000000000000000-mapping.dmp

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memory/920-120-0x0000000000000000-mapping.dmp

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memory/1352-118-0x0000000000000000-mapping.dmp

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memory/1364-121-0x0000000000000000-mapping.dmp

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