blackmatter | 86c84c07e27cc8aba129e1cf51215b65c445f178b94f2e8c4c10e6bc110daa94

General

Target

Payload.dat.dll
Size

73KB
MD5

01aef1c692a50a9d0e0369a58b1516ff
SHA1

8572344f5320d4b9ea4c03c37409210a290540c0
SHA256

86c84c07e27cc8aba129e1cf51215b65c445f178b94f2e8c4c10e6bc110daa94
SHA512

abbd643dfcc25bc68983ff1c572824cfd1a2f44eff3f37c22450041aa2de31bdaace6996c55e2371040f479a9b5364bbcfbc41d6bc48e364a0433bb76e7b6f72

Score

10^/10

blackmatter ransomware

Malware Config

Extracted

Path

C:\UCzUExPUL.README.txt

Family

blackmatter

Ransom Note

~+ * + ' BLACK | () .-.,='``'=. - o - '=/_ \ | * | '=._ | \ `=./`, ' . '=.__.=' `=' * + Matter + O * ' . >>> Hello BG International >>> What happens? Your network is encrypted, and currently not operational. We need only money, after payment we will give you a decryptor for the entire network and you will restore all the data. >>> What guarantees? We are not a politically motivated group and we do not need anything other than your money. If you pay, we will provide you the programs for decryption and we will delete your data. If we do not give you decrypters or we do not delete your data, no one will pay us in the future, this does not comply with our goals. We always keep our promises. >>> How to contact with us? 1. Download and install TOR Browser (https://www.torproject.org/). 2. Open http://supp24maprinktc7uizgfyqhisx7lkszb6ogh6lwdzpac23w3mh4tvyd.onion/RSW33BDOYPLWM78U9A09BZDI >>> Warning! Recovery recommendations. We strongly recommend you to do not MODIFY or REPAIR your files, that will damage them.

URLs

http://supp24maprinktc7uizgfyqhisx7lkszb6ogh6lwdzpac23w3mh4tvyd.onion/RSW33BDOYPLWM78U9A09BZDI

Signatures

BlackMatter Ransomware
BlackMatter ransomware group claims to be Darkside and REvil succesor.
ransomware blackmatter

Modifies extensions of user files 18 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\CloseBlock.tiff => C:\Users\Admin\Pictures\CloseBlock.tiff.UCzUExPUL	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\GroupUnregister.tiff.UCzUExPUL	rundll32.exe
File renamed	C:\Users\Admin\Pictures\RestoreDisconnect.crw => C:\Users\Admin\Pictures\RestoreDisconnect.crw.UCzUExPUL	rundll32.exe
File renamed	C:\Users\Admin\Pictures\StopPing.raw => C:\Users\Admin\Pictures\StopPing.raw.UCzUExPUL	rundll32.exe
File renamed	C:\Users\Admin\Pictures\UnblockDebug.raw => C:\Users\Admin\Pictures\UnblockDebug.raw.UCzUExPUL	rundll32.exe
File renamed	C:\Users\Admin\Pictures\CheckpointRename.raw => C:\Users\Admin\Pictures\CheckpointRename.raw.UCzUExPUL	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\CloseBlock.tiff.UCzUExPUL	rundll32.exe
File renamed	C:\Users\Admin\Pictures\ConnectOut.png => C:\Users\Admin\Pictures\ConnectOut.png.UCzUExPUL	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\ConnectOut.png.UCzUExPUL	rundll32.exe
File renamed	C:\Users\Admin\Pictures\LimitSend.raw => C:\Users\Admin\Pictures\LimitSend.raw.UCzUExPUL	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\RestoreDisconnect.crw.UCzUExPUL	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\LimitSend.raw.UCzUExPUL	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\UnblockDebug.raw.UCzUExPUL	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\CheckpointRename.raw.UCzUExPUL	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\CloseBlock.tiff	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\GroupUnregister.tiff	rundll32.exe
File renamed	C:\Users\Admin\Pictures\GroupUnregister.tiff => C:\Users\Admin\Pictures\GroupUnregister.tiff.UCzUExPUL	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\StopPing.raw.UCzUExPUL	rundll32.exe

Enumerates connected drives 3 TTPs 1 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

description	ioc	Process
File opened (read-only)	\??\Z:	rundll32.exe

Sets desktop wallpaper using registry 2 TTPs 2 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\UCzUExPUL.bmp"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\UCzUExPUL.bmp"	rundll32.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs

pid	Process
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe

Modifies Control Panel 2 IoCs

evasion

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\WallpaperStyle = "10"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe
1408	rundll32.exe

Suspicious use of AdjustPrivilegeToken 17 IoCs

description	pid	Process
Token: SeBackupPrivilege	1408	rundll32.exe
Token: SeDebugPrivilege	1408	rundll32.exe
Token: 36	1408	rundll32.exe
Token: SeImpersonatePrivilege	1408	rundll32.exe
Token: SeIncBasePriorityPrivilege	1408	rundll32.exe
Token: SeIncreaseQuotaPrivilege	1408	rundll32.exe
Token: 33	1408	rundll32.exe
Token: SeManageVolumePrivilege	1408	rundll32.exe
Token: SeProfSingleProcessPrivilege	1408	rundll32.exe
Token: SeRestorePrivilege	1408	rundll32.exe
Token: SeSecurityPrivilege	1408	rundll32.exe
Token: SeSystemProfilePrivilege	1408	rundll32.exe
Token: SeTakeOwnershipPrivilege	1408	rundll32.exe
Token: SeShutdownPrivilege	1408	rundll32.exe
Token: SeBackupPrivilege	3756	vssvc.exe
Token: SeRestorePrivilege	3756	vssvc.exe
Token: SeAuditPrivilege	3756	vssvc.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 652 wrote to memory of 1408	652	rundll32.exe	70
PID 652 wrote to memory of 1408	652	rundll32.exe	70
PID 652 wrote to memory of 1408	652	rundll32.exe	70

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\Payload.dat.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:652
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\Payload.dat.dll,#1
  2⤵
  - Modifies extensions of user files
  - Enumerates connected drives
  - Sets desktop wallpaper using registry
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Modifies Control Panel
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1408

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3756

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

1

T1491

Replay Monitor

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Downloads

memory/1408-116-0x0000000002CC0000-0x0000000002CC1000-memory.dmp

Filesize
4KB

Download
memory/1408-115-0x0000000002CC3000-0x0000000002CC5000-memory.dmp

Filesize
8KB

Download

Analysis

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