Malware Analysis Report

2024-10-16 03:21

Sample ID 230310-1mlrysfd73
Target BlackMatter.7a223a0aa0f88e84a68da.bin.exe
SHA256 7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296
Tags
blackmatter ransomware 0361b6a1f37016ed147e7617a3c08300
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

7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296

Threat Level: Known bad

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

Malicious Activity Summary

blackmatter ransomware 0361b6a1f37016ed147e7617a3c08300

Blackmatter family

BlackMatter Ransomware

Modifies extensions of user files

Enumerates connected drives

Suspicious use of NtSetInformationThreadHideFromDebugger

Sets desktop wallpaper using registry

Uses Volume Shadow Copy service COM API

Suspicious use of AdjustPrivilegeToken

Modifies Control Panel

Modifies registry class

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-03-10 21:46

Signatures

Blackmatter family

blackmatter

Analysis: behavioral2

Detonation Overview

Submitted

2023-03-10 21:46

Reported

2023-03-10 21:48

Platform

win10v2004-20230220-en

Max time kernel

146s

Max time network

150s

Command Line

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

Signatures

BlackMatter Ransomware

ransomware blackmatter

Modifies extensions of user files

ransomware
Description Indicator Process Target
File opened for modification C:\Users\Admin\Pictures\AssertAdd.tiff C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A

Enumerates connected drives

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

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\yUhWnJxWS.bmp" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\yUhWnJxWS.bmp" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A

Modifies Control Panel

evasion
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\Desktop C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\Desktop\WallpaperStyle = "10" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A

Modifies registry class

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

Suspicious use of AdjustPrivilegeToken

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

Uses Volume Shadow Copy service COM API

ransomware

Processes

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

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

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

Country Destination Domain Proto
US 52.152.110.14:443 tcp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 210.81.184.52.in-addr.arpa udp
US 8.8.8.8:53 140.145.190.20.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 52.152.110.14:443 tcp
US 52.152.110.14:443 tcp
US 8.8.8.8:53 62.13.109.52.in-addr.arpa udp
US 52.152.110.14:443 tcp
US 8.8.8.8:53 97.238.32.23.in-addr.arpa udp
US 8.8.8.8:53 76.38.195.152.in-addr.arpa udp
US 52.152.110.14:443 tcp
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
US 93.184.221.240:80 tcp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 204.79.197.203:80 tcp
US 52.152.110.14:443 tcp
US 52.152.110.14:443 tcp
US 52.152.110.14:443 tcp

Files

memory/4292-134-0x0000000000F60000-0x0000000000F70000-memory.dmp

memory/4292-135-0x0000000000F60000-0x0000000000F70000-memory.dmp

memory/4292-136-0x0000000000F60000-0x0000000000F70000-memory.dmp

\Device\HarddiskVolume1\yUhWnJxWS.README.txt

MD5 a34fb07ce7696459f74aef7fefb56352
SHA1 dbd83ff37e90810eb57a802464ac5458ee092d5d
SHA256 b5497509edf9a86d80038354f2f07968785592be55ff779e573c776d85437e04
SHA512 30b2a812bdb0c4caeccf542fe5c07e81c21c50d3211f4526bfba69b6473592577aebf7488c622167c7ffe5fd0cb5f4dfcf0c1d9795cd2416ad0509ac44c01ce8

Analysis: behavioral1

Detonation Overview

Submitted

2023-03-10 21:46

Reported

2023-03-10 21:48

Platform

win7-20230220-en

Max time kernel

31s

Max time network

33s

Command Line

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

Signatures

BlackMatter Ransomware

ransomware blackmatter

Modifies extensions of user files

ransomware
Description Indicator Process Target
File renamed C:\Users\Admin\Pictures\JoinUninstall.png => C:\Users\Admin\Pictures\JoinUninstall.png.uBBIsrJIE C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A
File opened for modification C:\Users\Admin\Pictures\JoinUninstall.png.uBBIsrJIE C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A
File renamed C:\Users\Admin\Pictures\SuspendMerge.png => C:\Users\Admin\Pictures\SuspendMerge.png.uBBIsrJIE C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A
File opened for modification C:\Users\Admin\Pictures\SuspendMerge.png.uBBIsrJIE C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\uBBIsrJIE.bmp" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\uBBIsrJIE.bmp" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A

Modifies Control Panel

evasion
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Control Panel\Desktop C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Control Panel\Desktop\WallpaperStyle = "10" C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe N/A

Modifies registry class

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

Suspicious use of AdjustPrivilegeToken

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

Uses Volume Shadow Copy service COM API

ransomware

Processes

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

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

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

N/A

Files

memory/1060-55-0x0000000002220000-0x0000000002260000-memory.dmp

memory/1060-56-0x0000000002220000-0x0000000002260000-memory.dmp

memory/1060-57-0x0000000002220000-0x0000000002260000-memory.dmp

C:\Users\uBBIsrJIE.README.txt

MD5 a34fb07ce7696459f74aef7fefb56352
SHA1 dbd83ff37e90810eb57a802464ac5458ee092d5d
SHA256 b5497509edf9a86d80038354f2f07968785592be55ff779e573c776d85437e04
SHA512 30b2a812bdb0c4caeccf542fe5c07e81c21c50d3211f4526bfba69b6473592577aebf7488c622167c7ffe5fd0cb5f4dfcf0c1d9795cd2416ad0509ac44c01ce8