babuk | 1e24560100d010c27cc19c59f9fe1531e4286ecb21fe53763165f30c5f58dc90

General

Target

babuk.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 9 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

babuk.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Pictures\RenameRevoke.tiff	babuk.exe
File opened for modification	C:\Users\Admin\Pictures\RestartStep.crw.babyk	babuk.exe
File opened for modification	C:\Users\Admin\Pictures\RenameRevoke.tiff.babyk	babuk.exe
File opened for modification	C:\Users\Admin\Pictures\UnprotectProtect.tif.babyk	babuk.exe
File renamed	C:\Users\Admin\Pictures\RestartStep.crw => C:\Users\Admin\Pictures\RestartStep.crw.babyk	babuk.exe
File renamed	C:\Users\Admin\Pictures\RenameRevoke.tiff => C:\Users\Admin\Pictures\RenameRevoke.tiff.babyk	babuk.exe
File renamed	C:\Users\Admin\Pictures\StartShow.png => C:\Users\Admin\Pictures\StartShow.png.babyk	babuk.exe
File opened for modification	C:\Users\Admin\Pictures\StartShow.png.babyk	babuk.exe
File renamed	C:\Users\Admin\Pictures\UnprotectProtect.tif => C:\Users\Admin\Pictures\UnprotectProtect.tif.babyk	babuk.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:

babuk.exe

description ioc process

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

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

babuk.exe

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

Drops file in Windows directory 6 IoCs

Processes:

svchost.exe

description	ioc	process
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
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

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

4284 vssadmin.exe
1924 vssadmin.exe

pid	process
4284	vssadmin.exe
1924	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\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	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\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\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\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

babuk.exe

pid process

5056 babuk.exe
5056 babuk.exe

pid	process
5056	babuk.exe
5056	babuk.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

vssvc.exesvchost.exe

description	pid	process
Token: SeBackupPrivilege	4580	vssvc.exe
Token: SeRestorePrivilege	4580	vssvc.exe
Token: SeAuditPrivilege	4580	vssvc.exe
Token: SeShutdownPrivilege	3140	svchost.exe
Token: SeCreatePagefilePrivilege	3140	svchost.exe
Token: SeShutdownPrivilege	3140	svchost.exe
Token: SeCreatePagefilePrivilege	3140	svchost.exe
Token: SeShutdownPrivilege	3140	svchost.exe
Token: SeCreatePagefilePrivilege	3140	svchost.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

babuk.execmd.execmd.exe

description	pid	process	target process
PID 5056 wrote to memory of 3916	5056	babuk.exe	cmd.exe
PID 5056 wrote to memory of 3916	5056	babuk.exe	cmd.exe
PID 3916 wrote to memory of 4284	3916	cmd.exe	vssadmin.exe
PID 3916 wrote to memory of 4284	3916	cmd.exe	vssadmin.exe
PID 5056 wrote to memory of 3368	5056	babuk.exe	cmd.exe
PID 5056 wrote to memory of 3368	5056	babuk.exe	cmd.exe
PID 3368 wrote to memory of 1924	3368	cmd.exe	vssadmin.exe
PID 3368 wrote to memory of 1924	3368	cmd.exe	vssadmin.exe

C:\Users\Admin\AppData\Local\Temp\babuk.exe
"C:\Users\Admin\AppData\Local\Temp\babuk.exe"
1⤵
- Modifies extensions of user files
- Checks computer location settings
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5056
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3916
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:4284
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3368
- - C:\Windows\system32\vssadmin.exe
    vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:1924

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4580

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe 8d3d5e175822aa8e021801ce2d116042 94tF6OPPm02uycGzWhj1zw.0.1.0.0.0
1⤵
- Modifies data under HKEY_USERS
PID:3476

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:3140

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

File Deletion

Modify Registry

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

2

T1490

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Downloads

memory/3140-133-0x0000018E81D30000-0x0000018E81D40000-memory.dmp

Filesize
64KB

Download
memory/3140-134-0x0000018E81D90000-0x0000018E81DA0000-memory.dmp

Filesize
64KB

Download
memory/3140-135-0x0000018E84A70000-0x0000018E84A74000-memory.dmp

Filesize
16KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads