babuk | 1e24560100d010c27cc19c59f9fe1531e4286ecb21fe53763165f30c5f58dc90

General

Target

e_win.exe
Size

79KB
MD5

92832ae49373b56748817cb5398ed706
SHA1

61e4505d605882b809d9c7f3dcbf163ff1678382
SHA256

1e24560100d010c27cc19c59f9fe1531e4286ecb21fe53763165f30c5f58dc90
SHA512

398ef0e5ffb6f914a2d1df23f12561153ef52ea28d345232cbb2daa84c43d1f1934be0c40d00b2502c2437c2733d0cdf75d24be6a8b47fc69648ad16c0bb4858

Score

10^/10

babuk persistence 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 16 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

e_win.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\StartSuspend.raw => C:\Users\Admin\Pictures\StartSuspend.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\StartSuspend.raw.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\UnpublishResume.png => C:\Users\Admin\Pictures\UnpublishResume.png.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\WriteSuspend.png => C:\Users\Admin\Pictures\WriteSuspend.png.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\DenyOut.tif => C:\Users\Admin\Pictures\DenyOut.tif.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\DenyOut.tif.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\DismountReset.crw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\ImportConvert.raw.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\MoveClose.raw => C:\Users\Admin\Pictures\MoveClose.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\MoveClose.raw.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\SelectRemove.png.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\UnpublishResume.png.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\DismountReset.crw => C:\Users\Admin\Pictures\DismountReset.crw.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\ImportConvert.raw => C:\Users\Admin\Pictures\ImportConvert.raw.babyk	e_win.exe
File renamed	C:\Users\Admin\Pictures\SelectRemove.png => C:\Users\Admin\Pictures\SelectRemove.png.babyk	e_win.exe
File opened for modification	C:\Users\Admin\Pictures\WriteSuspend.png.babyk	e_win.exe

Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

e_win.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation e_win.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	e_win.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.exe

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

Drops file in Windows directory 6 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.edb	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\ReportingEvents.log	svchost.exe
File opened for modification	C:\Windows\WindowsUpdate.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk	svchost.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

376 vssadmin.exe
2584 vssadmin.exe

pid	process
376	vssadmin.exe
2584	vssadmin.exe

Modifies data under HKEY_USERS 41 IoCs

Processes:

WaaSMedicAgent.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

e_win.exe

pid process

3352 e_win.exe
3352 e_win.exe

pid	process
3352	e_win.exe
3352	e_win.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

vssvc.exesvchost.exe

description	pid	process
Token: SeBackupPrivilege	4072	vssvc.exe
Token: SeRestorePrivilege	4072	vssvc.exe
Token: SeAuditPrivilege	4072	vssvc.exe
Token: SeShutdownPrivilege	3212	svchost.exe
Token: SeCreatePagefilePrivilege	3212	svchost.exe
Token: SeShutdownPrivilege	3212	svchost.exe
Token: SeCreatePagefilePrivilege	3212	svchost.exe
Token: SeShutdownPrivilege	3212	svchost.exe
Token: SeCreatePagefilePrivilege	3212	svchost.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

e_win.execmd.execmd.exe

description	pid	process	target process
PID 3352 wrote to memory of 1224	3352	e_win.exe	cmd.exe
PID 3352 wrote to memory of 1224	3352	e_win.exe	cmd.exe
PID 1224 wrote to memory of 376	1224	cmd.exe	vssadmin.exe
PID 1224 wrote to memory of 376	1224	cmd.exe	vssadmin.exe
PID 3352 wrote to memory of 456	3352	e_win.exe	cmd.exe
PID 3352 wrote to memory of 456	3352	e_win.exe	cmd.exe
PID 456 wrote to memory of 2584	456	cmd.exe	vssadmin.exe
PID 456 wrote to memory of 2584	456	cmd.exe	vssadmin.exe

C:\Users\Admin\AppData\Local\Temp\e_win.exe
"C:\Users\Admin\AppData\Local\Temp\e_win.exe"
1⤵
- Modifies extensions of user files
- Checks computer location settings
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3352

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
2⤵
- Suspicious use of WriteProcessMemory
PID:1224

C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
3⤵
- Interacts with shadow copies
PID:376

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
2⤵
- Suspicious use of WriteProcessMemory
PID:456

C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
3⤵
- Interacts with shadow copies
PID:2584

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4072

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe b6e884a8430c1f616007539c3d88cac5 WFHYrf6NjEyw3sxbHvvmRw.0.1.0.0.0
1⤵
- Modifies data under HKEY_USERS
PID:3672

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:3212