babuk | 82e560a078cd7bb4472d5af832a04c4bc8f1001bac97b1574efe9863d3f66550

Resubmissions

21-02-2024 19:59

240221-yqmsbafb69 10

27-02-2023 15:10

230227-sj843seb89 1

27-06-2021 20:55

210627-2nsmat5hex 10

Analysis

max time kernel
19s
max time network
135s
platform
windows10_x64
resource
win10v20210408
submitted
27-06-2021 20:55

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General

Target

e_win.bin.exe
Size

79KB
MD5

e5adc80639046a5c69bcfeee458e0833
SHA1

d9e3f9edda5df290b5be6fb1d335b750dd7c6758
SHA256

ea95f131bd9b49104d9e7ae83335254549ded9d71d557c6e4746740aecca2c85
SHA512

c11a24e14ba5fa2b0e2c2b544dd4218ce4c8caae3db7cebd5b0305223f96bde09c9bd237cb8d32768f30118f7be73240971e772f7a89db7c0fba5c6105107e3a

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 19 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

e_win.bin.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\CompareRevoke.tif => C:\Users\Admin\Pictures\CompareRevoke.tif.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\OptimizeApprove.png => C:\Users\Admin\Pictures\OptimizeApprove.png.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\ClearConvertFrom.tif.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\CompareRevoke.tif.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\EnableUnlock.crw => C:\Users\Admin\Pictures\EnableUnlock.crw.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\MergeSearch.tiff => C:\Users\Admin\Pictures\MergeSearch.tiff.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\MergeSearch.tiff.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\UnlockTest.png.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\WaitPop.tif.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\ClearConvertFrom.tif => C:\Users\Admin\Pictures\ClearConvertFrom.tif.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\MergeTrace.raw => C:\Users\Admin\Pictures\MergeTrace.raw.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\OptimizeApprove.png.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\ShowDisconnect.tif => C:\Users\Admin\Pictures\ShowDisconnect.tif.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\UnlockTest.png => C:\Users\Admin\Pictures\UnlockTest.png.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\MergeSearch.tiff	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\MergeTrace.raw.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\ShowDisconnect.tif.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\WaitPop.tif => C:\Users\Admin\Pictures\WaitPop.tif.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\EnableUnlock.crw.babyk	e_win.bin.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:

e_win.bin.exe

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

3832 vssadmin.exe
3576 vssadmin.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

e_win.bin.exe

pid process

640 e_win.bin.exe
640 e_win.bin.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 4056 vssvc.exe
Token: SeRestorePrivilege 4056 vssvc.exe
Token: SeAuditPrivilege 4056 vssvc.exe

pid	process
3832	vssadmin.exe
3576	vssadmin.exe

pid	process
640	e_win.bin.exe
640	e_win.bin.exe

description	pid	process
Token: SeBackupPrivilege	4056	vssvc.exe
Token: SeRestorePrivilege	4056	vssvc.exe
Token: SeAuditPrivilege	4056	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

e_win.bin.execmd.execmd.exe

description	pid	process	target process
PID 640 wrote to memory of 820	640	e_win.bin.exe	cmd.exe
PID 640 wrote to memory of 820	640	e_win.bin.exe	cmd.exe
PID 820 wrote to memory of 3832	820	cmd.exe	vssadmin.exe
PID 820 wrote to memory of 3832	820	cmd.exe	vssadmin.exe
PID 640 wrote to memory of 3464	640	e_win.bin.exe	cmd.exe
PID 640 wrote to memory of 3464	640	e_win.bin.exe	cmd.exe
PID 3464 wrote to memory of 3576	3464	cmd.exe	vssadmin.exe
PID 3464 wrote to memory of 3576	3464	cmd.exe	vssadmin.exe

C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe
"C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe"
1⤵
- Modifies extensions of user files
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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:820
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:3832
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3464
- - 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:4056

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File Deletion

T1107

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

memory/820-114-0x0000000000000000-mapping.dmp

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memory/3464-116-0x0000000000000000-mapping.dmp

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memory/3576-117-0x0000000000000000-mapping.dmp

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memory/3832-115-0x0000000000000000-mapping.dmp

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