babuk | 10843ab4b6e4c9592a31a72bc5f7ccfa48fd365e6fba1b100319f40125f8da6f

General

Target

e_win.bin.exe
Size

79KB
MD5

3c070554f9b588ac31e317be5d5f5120
SHA1

43ff7548df9f8597a4a0e8af82fb75ad622f6750
SHA256

10843ab4b6e4c9592a31a72bc5f7ccfa48fd365e6fba1b100319f40125f8da6f
SHA512

9eab16bd98efdb908902bc7303962dfa645248c411a407234ba03c7bd75cd8909cd41902e4a50847677d6e42c20a10e98cbb0d57f31a11f60d3eb05936ab334b
SSDEEP

1536:m6UhZM4hubesrQLOJgY8ZZP8LHD4XWaNH71dLdG1iiFM2iG2zs4:ghZ5YesrQLOJgY8Zp8LHD4XWaNH71dLI

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 13 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

e_win.bin.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Pictures\StepRead.tiff.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\StepRead.tiff	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\GetConfirm.png => C:\Users\Admin\Pictures\GetConfirm.png.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\CopyConvertTo.png.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\GetConfirm.png.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\SuspendEnable.tif.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\SendUnpublish.png => C:\Users\Admin\Pictures\SendUnpublish.png.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\CopyConvertTo.png => C:\Users\Admin\Pictures\CopyConvertTo.png.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\ExportDeny.png => C:\Users\Admin\Pictures\ExportDeny.png.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\ExportDeny.png.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\SuspendEnable.tif => C:\Users\Admin\Pictures\SuspendEnable.tif.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\SendUnpublish.png.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\StepRead.tiff => C:\Users\Admin\Pictures\StepRead.tiff.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)	\??\R:	e_win.bin.exe
File opened (read-only)	\??\T:	e_win.bin.exe
File opened (read-only)	\??\I:	e_win.bin.exe
File opened (read-only)	\??\S:	e_win.bin.exe
File opened (read-only)	\??\F:	e_win.bin.exe
File opened (read-only)	\??\B:	e_win.bin.exe
File opened (read-only)	\??\E:	e_win.bin.exe
File opened (read-only)	\??\U:	e_win.bin.exe
File opened (read-only)	\??\P:	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)	\??\L:	e_win.bin.exe
File opened (read-only)	\??\Z:	e_win.bin.exe
File opened (read-only)	\??\V:	e_win.bin.exe
File opened (read-only)	\??\Q:	e_win.bin.exe
File opened (read-only)	\??\M:	e_win.bin.exe
File opened (read-only)	\??\K:	e_win.bin.exe
File opened (read-only)	\??\Y:	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)	\??\G:	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)	\??\W:	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

1484 vssadmin.exe
1496 vssadmin.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

e_win.bin.exe

pid process

1476 e_win.bin.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 568 vssvc.exe
Token: SeRestorePrivilege 568 vssvc.exe
Token: SeAuditPrivilege 568 vssvc.exe

pid	process
1484	vssadmin.exe
1496	vssadmin.exe

pid	process
1476	e_win.bin.exe

description	pid	process
Token: SeBackupPrivilege	568	vssvc.exe
Token: SeRestorePrivilege	568	vssvc.exe
Token: SeAuditPrivilege	568	vssvc.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

e_win.bin.execmd.execmd.exe

description	pid	process	target process
PID 1476 wrote to memory of 1700	1476	e_win.bin.exe	cmd.exe
PID 1476 wrote to memory of 1700	1476	e_win.bin.exe	cmd.exe
PID 1476 wrote to memory of 1700	1476	e_win.bin.exe	cmd.exe
PID 1476 wrote to memory of 1700	1476	e_win.bin.exe	cmd.exe
PID 1700 wrote to memory of 1484	1700	cmd.exe	vssadmin.exe
PID 1700 wrote to memory of 1484	1700	cmd.exe	vssadmin.exe
PID 1700 wrote to memory of 1484	1700	cmd.exe	vssadmin.exe
PID 1476 wrote to memory of 608	1476	e_win.bin.exe	cmd.exe
PID 1476 wrote to memory of 608	1476	e_win.bin.exe	cmd.exe
PID 1476 wrote to memory of 608	1476	e_win.bin.exe	cmd.exe
PID 1476 wrote to memory of 608	1476	e_win.bin.exe	cmd.exe
PID 608 wrote to memory of 1496	608	cmd.exe	vssadmin.exe
PID 608 wrote to memory of 1496	608	cmd.exe	vssadmin.exe
PID 608 wrote to memory of 1496	608	cmd.exe	vssadmin.exe

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.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:1476
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1700
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:1484
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:608
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:1496

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:568

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File Deletion

2

T1107

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

2

T1490

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Downloads

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

Filesize
4B

MD5
1cb251ec0d568de6a929b520c4aed8d1

SHA1
372ea08cab33e71c02c651dbc83a474d32c676ea

SHA256
982d9e3eb996f559e633f4d194def3761d909f5a3b647d1a851fead67c32c9d1

SHA512
eaf2c12742cb8c161bcbd84b032b9bb98999a23282542672ca01cc6edd268f7dce9987ad6b2bc79305634f89d90b90102bcd59a57e7135b8e3ceb93c0597117b

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads