Malware Analysis Report

2024-10-16 03:21

Sample ID 230208-k5ztjahh59
Target BlackMatter.7a223a0aa0f88e84a68da.exe
SHA256 7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296
Tags
0361b6a1f37016ed147e7617a3c08300 blackmatter ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296

Threat Level: Known bad

The file BlackMatter.7a223a0aa0f88e84a68da.exe was found to be: Known bad.

Malicious Activity Summary

0361b6a1f37016ed147e7617a3c08300 blackmatter ransomware

Blackmatter family

BlackMatter Ransomware

Modifies extensions of user files

Enumerates connected drives

Suspicious use of NtSetInformationThreadHideFromDebugger

Sets desktop wallpaper using registry

Modifies Control Panel

Modifies registry class

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-02-08 09:11

Signatures

Blackmatter family

blackmatter

Analysis: behavioral1

Detonation Overview

Submitted

2023-02-08 09:11

Reported

2023-02-08 09:14

Platform

win7-20220901-en

Max time kernel

46s

Max time network

50s

Command Line

"C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe"

Signatures

BlackMatter Ransomware

ransomware blackmatter

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\iMxWNjZWz.bmp" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\iMxWNjZWz.bmp" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A

Modifies Control Panel

evasion
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Control Panel\Desktop C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Control Panel\Desktop\WallpaperStyle = "10" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.iMxWNjZWz\ = "iMxWNjZWz" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\iMxWNjZWz\DefaultIcon C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\iMxWNjZWz C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\iMxWNjZWz\DefaultIcon\ = "C:\\ProgramData\\iMxWNjZWz.ico" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.iMxWNjZWz C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: 36 N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeImpersonatePrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.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\BlackMatter.7a223a0aa0f88e84a68da.exe

"C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

N/A

Files

memory/1808-54-0x0000000075AC1000-0x0000000075AC3000-memory.dmp

memory/1808-55-0x0000000000515000-0x0000000000526000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-02-08 09:11

Reported

2023-02-08 09:14

Platform

win10v2004-20221111-en

Max time kernel

91s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe"

Signatures

BlackMatter Ransomware

ransomware blackmatter

Modifies extensions of user files

ransomware
Description Indicator Process Target
File renamed C:\Users\Admin\Pictures\ResetGet.png => C:\Users\Admin\Pictures\ResetGet.png.AU8hl5chT C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
File opened for modification C:\Users\Admin\Pictures\ResetGet.png.AU8hl5chT C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
File renamed C:\Users\Admin\Pictures\StopCompare.png => C:\Users\Admin\Pictures\StopCompare.png.AU8hl5chT C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
File opened for modification C:\Users\Admin\Pictures\StopCompare.png.AU8hl5chT C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
File opened for modification C:\Users\Admin\Pictures\RedoSwitch.tiff C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\AU8hl5chT.bmp" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\AU8hl5chT.bmp" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A

Modifies Control Panel

evasion
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\Desktop C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\Desktop\WallpaperStyle = "10" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\AU8hl5chT\DefaultIcon\ = "C:\\ProgramData\\AU8hl5chT.ico" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.AU8hl5chT C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.AU8hl5chT\ = "AU8hl5chT" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\AU8hl5chT\DefaultIcon C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\AU8hl5chT C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: 36 N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeImpersonatePrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.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\BlackMatter.7a223a0aa0f88e84a68da.exe

"C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.exe"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

Country Destination Domain Proto
NL 104.80.225.205:443 tcp
US 104.208.16.89:443 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp

Files

N/A