Malware Analysis Report

2024-10-24 18:33

Sample ID 211005-pr319aaagr
Target b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f
SHA256 b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f
Tags
blackmatter ransomware 0c6ca0532355a106258791f50b66c153
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f

Threat Level: Known bad

The file b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f was found to be: Known bad.

Malicious Activity Summary

blackmatter ransomware 0c6ca0532355a106258791f50b66c153

Blackmatter family

BlackMatter Ransomware

Modifies extensions of user files

Enumerates connected drives

Sets desktop wallpaper using registry

Suspicious use of NtSetInformationThreadHideFromDebugger

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Modifies Control Panel

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-10-05 12:34

Signatures

Blackmatter family

blackmatter

Analysis: behavioral2

Detonation Overview

Submitted

2021-10-05 12:34

Reported

2021-10-05 12:37

Platform

win10-en-20210920

Max time kernel

117s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe"

Signatures

BlackMatter Ransomware

ransomware blackmatter

Modifies extensions of user files

ransomware
Description Indicator Process Target
File renamed C:\Users\Admin\Pictures\ConvertToExit.png => C:\Users\Admin\Pictures\ConvertToExit.png.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File renamed C:\Users\Admin\Pictures\JoinConfirm.png => C:\Users\Admin\Pictures\JoinConfirm.png.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File renamed C:\Users\Admin\Pictures\StartUpdate.raw => C:\Users\Admin\Pictures\StartUpdate.raw.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File renamed C:\Users\Admin\Pictures\ApproveSubmit.crw => C:\Users\Admin\Pictures\ApproveSubmit.crw.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File renamed C:\Users\Admin\Pictures\BackupInvoke.raw => C:\Users\Admin\Pictures\BackupInvoke.raw.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File opened for modification C:\Users\Admin\Pictures\ConvertToExit.png.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File opened for modification C:\Users\Admin\Pictures\HideEdit.png.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File opened for modification C:\Users\Admin\Pictures\JoinConfirm.png.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File opened for modification C:\Users\Admin\Pictures\NewCompare.tiff C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File opened for modification C:\Users\Admin\Pictures\ApproveSubmit.crw.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File opened for modification C:\Users\Admin\Pictures\ExitExport.raw.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File renamed C:\Users\Admin\Pictures\HideEdit.png => C:\Users\Admin\Pictures\HideEdit.png.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File opened for modification C:\Users\Admin\Pictures\NewCompare.tiff.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File renamed C:\Users\Admin\Pictures\WriteCopy.raw => C:\Users\Admin\Pictures\WriteCopy.raw.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File opened for modification C:\Users\Admin\Pictures\BackupInvoke.raw.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File renamed C:\Users\Admin\Pictures\ExitExport.raw => C:\Users\Admin\Pictures\ExitExport.raw.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File renamed C:\Users\Admin\Pictures\NewCompare.tiff => C:\Users\Admin\Pictures\NewCompare.tiff.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File opened for modification C:\Users\Admin\Pictures\StartUpdate.raw.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
File opened for modification C:\Users\Admin\Pictures\WriteCopy.raw.AVx2lZV2X C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\AVx2lZV2X.bmp" C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\AVx2lZV2X.bmp" C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A

Modifies Control Panel

evasion
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Control Panel\Desktop C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Control Panel\Desktop\WallpaperStyle = "10" C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: 36 N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeImpersonatePrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe

"C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

Files

memory/2136-115-0x0000000000F33000-0x0000000000F35000-memory.dmp

memory/2136-116-0x0000000000F30000-0x0000000000F31000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2021-10-05 12:34

Reported

2021-10-05 12:38

Platform

win7v20210408

Max time kernel

106s

Max time network

38s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe"

Signatures

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: 36 N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeImpersonatePrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe

"C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 572 -s 372

Network

N/A

Files

memory/572-59-0x00000000757C1000-0x00000000757C3000-memory.dmp

memory/572-60-0x0000000001ED5000-0x0000000001EE6000-memory.dmp

memory/572-61-0x0000000001ED0000-0x0000000001ED1000-memory.dmp

memory/628-62-0x0000000000000000-mapping.dmp

memory/628-63-0x0000000000340000-0x0000000000341000-memory.dmp