blackbasta | 64b434ba8ece57e943593ae0972c77e311ea9e80a4975e52814797aa99d4c5f7

General

Target

3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe
Size

928KB
MD5

2dc4adf06247b4ed9031a53ef910626c
SHA1

789437e946b3e8d1ccd14ee70e42c7d89ba054b2
SHA256

3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e
SHA512

9e6eaa4b27e2d6bc1306c33e74465256fab086972680d3a0014cafca8f22bbf865ffaa0f81332ffef83287252faf2ca0c7f369d11412b19ffb57e8e72ea5e0ae
SSDEEP

24576:oUY29aeV/XqzB+qv6w8zJx/W2nz9dPOmX:oUYMPqzFvT8/W2nznP

Score

10^/10

blackbasta defense_evasion discovery execution impact ransomware

Malware Config

Signatures

Black Basta
A ransomware family targeting Windows and Linux ESXi first seen in February 2022.
ransomware blackbasta
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\dlaksjdoiwq.jpg"	3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1524	1116	WerFault.exe	80

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Interacts with shadow copies 3 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
4352	vssadmin.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.basta\DefaultIcon	3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.basta	3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.basta\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fkdjsadasd.ico"	3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	5012	vssvc.exe
Token: SeRestorePrivilege	5012	vssvc.exe
Token: SeAuditPrivilege	5012	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1116 wrote to memory of 844	1116	3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe	83
PID 1116 wrote to memory of 844	1116	3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe	83
PID 1116 wrote to memory of 844	1116	3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe	83
PID 844 wrote to memory of 4352	844	cmd.exe	85
PID 844 wrote to memory of 4352	844	cmd.exe	85
PID 1116 wrote to memory of 2924	1116	3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe	88
PID 1116 wrote to memory of 2924	1116	3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe	88
PID 1116 wrote to memory of 2924	1116	3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe	88

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\3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe
"C:\Users\Admin\AppData\Local\Temp\3d8713641264c41cd6784c5569c1447299fba88633070e40e70bb3ae2b4c5a4e.exe"
1⤵
- Sets desktop wallpaper using registry
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1116
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:844
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:4352
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Windows\System32\vssadmin.exe delete shadows /all /quiet
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2924
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1116 -s 572
  2⤵
  - Program crash
  PID:1524

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:5012

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1116 -ip 1116
1⤵
PID:4264

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Windows Management Instrumentation

1

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

1

T1006

Indicator Removal

2

T1070

File Deletion

Modify Registry

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

1

T1491

Inhibit System Recovery

2

T1490

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1116-0-0x0000000000D40000-0x0000000000DCE000-memory.dmp

Filesize
568KB

Download
memory/1116-3-0x0000000000D40000-0x0000000000DCE000-memory.dmp

Filesize
568KB

Download

Analysis

Sharing