babuk | ea95f131bd9b49104d9e7ae83335254549ded9d71d557c6e4746740aecca2c85

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 27 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\OpenProtect.tiff.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\OpenResume.png.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\EditSet.tiff => C:\Users\Admin\Pictures\EditSet.tiff.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\EditSet.tiff.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\WatchUninstall.tiff	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\WatchUninstall.tiff => C:\Users\Admin\Pictures\WatchUninstall.tiff.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\AssertStop.raw.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\EnterComplete.tiff	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\GetSubmit.crw.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\WatchUninstall.tiff.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\DisableEnable.tiff	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\EditSet.tiff	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\OpenProtect.tiff => C:\Users\Admin\Pictures\OpenProtect.tiff.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\AssertStop.raw => C:\Users\Admin\Pictures\AssertStop.raw.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\EnterComplete.tiff.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\EnterComplete.tiff => C:\Users\Admin\Pictures\EnterComplete.tiff.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\InstallCompress.png => C:\Users\Admin\Pictures\InstallCompress.png.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\InstallCompress.png.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\OpenResume.png => C:\Users\Admin\Pictures\OpenResume.png.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\UseDebug.crw => C:\Users\Admin\Pictures\UseDebug.crw.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\OpenProtect.tiff	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\RegisterSplit.png.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\UseDebug.crw.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\GetSubmit.crw => C:\Users\Admin\Pictures\GetSubmit.crw.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\RegisterSplit.png => C:\Users\Admin\Pictures\RegisterSplit.png.babyk	e_win.bin.exe
File renamed	C:\Users\Admin\Pictures\DisableEnable.tiff => C:\Users\Admin\Pictures\DisableEnable.tiff.babyk	e_win.bin.exe
File opened for modification	C:\Users\Admin\Pictures\DisableEnable.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)	\??\K:	e_win.bin.exe
File opened (read-only)	\??\Z:	e_win.bin.exe
File opened (read-only)	\??\L:	e_win.bin.exe
File opened (read-only)	\??\X:	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)	\??\I:	e_win.bin.exe
File opened (read-only)	\??\A:	e_win.bin.exe
File opened (read-only)	\??\S:	e_win.bin.exe
File opened (read-only)	\??\M:	e_win.bin.exe
File opened (read-only)	\??\E:	e_win.bin.exe
File opened (read-only)	\??\Y:	e_win.bin.exe
File opened (read-only)	\??\P:	e_win.bin.exe
File opened (read-only)	\??\F:	e_win.bin.exe
File opened (read-only)	\??\V:	e_win.bin.exe
File opened (read-only)	\??\J:	e_win.bin.exe
File opened (read-only)	\??\N:	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)	\??\O:	e_win.bin.exe
File opened (read-only)	\??\G:	e_win.bin.exe
File opened (read-only)	\??\H:	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

3752 vssadmin.exe
3308 vssadmin.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

e_win.bin.exe

pid process

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

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 3352 vssvc.exe
Token: SeRestorePrivilege 3352 vssvc.exe
Token: SeAuditPrivilege 3352 vssvc.exe

pid	process
3752	vssadmin.exe
3308	vssadmin.exe

pid	process
528	e_win.bin.exe
528	e_win.bin.exe

description	pid	process
Token: SeBackupPrivilege	3352	vssvc.exe
Token: SeRestorePrivilege	3352	vssvc.exe
Token: SeAuditPrivilege	3352	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

e_win.bin.execmd.execmd.exe

description	pid	process	target process
PID 528 wrote to memory of 636	528	e_win.bin.exe	cmd.exe
PID 528 wrote to memory of 636	528	e_win.bin.exe	cmd.exe
PID 636 wrote to memory of 3752	636	cmd.exe	vssadmin.exe
PID 636 wrote to memory of 3752	636	cmd.exe	vssadmin.exe
PID 528 wrote to memory of 1980	528	e_win.bin.exe	cmd.exe
PID 528 wrote to memory of 1980	528	e_win.bin.exe	cmd.exe
PID 1980 wrote to memory of 3308	1980	cmd.exe	vssadmin.exe
PID 1980 wrote to memory of 3308	1980	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:528
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:636
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:3752
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1980
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:3308