Malware Analysis Report

2024-10-16 03:23

Sample ID 230312-b5vp5scc64
Target 930b9c1792a539acdb051af34de91060.bin
SHA256 d9eba524d87f742cebb5cb5788f7ab38726184321f1998dcb28488d15fa3b348
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

d9eba524d87f742cebb5cb5788f7ab38726184321f1998dcb28488d15fa3b348

Threat Level: Known bad

The file 930b9c1792a539acdb051af34de91060.bin was found to be: Known bad.

Malicious Activity Summary

0361b6a1f37016ed147e7617a3c08300 blackmatter ransomware

Blackmatter family

BlackMatter Ransomware

Modifies extensions of user files

Enumerates connected drives

Sets desktop wallpaper using registry

Suspicious use of NtSetInformationThreadHideFromDebugger

Modifies Control Panel

Modifies registry class

Uses Volume Shadow Copy service COM API

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-03-12 01:44

Signatures

Blackmatter family

blackmatter

Analysis: behavioral1

Detonation Overview

Submitted

2023-03-12 01:44

Reported

2023-03-12 01:46

Platform

win7-20230220-en

Max time kernel

27s

Max time network

29s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe"

Signatures

BlackMatter Ransomware

ransomware blackmatter

Modifies extensions of user files

ransomware
Description Indicator Process Target
File opened for modification C:\Users\Admin\Pictures\GetStart.tiff C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
File renamed C:\Users\Admin\Pictures\SubmitJoin.png => C:\Users\Admin\Pictures\SubmitJoin.png.sfgL6ekLx C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
File opened for modification C:\Users\Admin\Pictures\SubmitJoin.png.sfgL6ekLx C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\sfgL6ekLx.bmp" C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\sfgL6ekLx.bmp" C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A

Modifies Control Panel

evasion
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Control Panel\Desktop C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Control Panel\Desktop\WallpaperStyle = "10" C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\sfgL6ekLx\DefaultIcon\ = "C:\\ProgramData\\sfgL6ekLx.ico" C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.sfgL6ekLx C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.sfgL6ekLx\ = "sfgL6ekLx" C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\sfgL6ekLx\DefaultIcon C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\sfgL6ekLx C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: 36 N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeImpersonatePrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.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\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe

"C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

N/A

Files

memory/912-55-0x0000000000CF0000-0x0000000000D30000-memory.dmp

C:\Users\sfgL6ekLx.README.txt

MD5 a34fb07ce7696459f74aef7fefb56352
SHA1 dbd83ff37e90810eb57a802464ac5458ee092d5d
SHA256 b5497509edf9a86d80038354f2f07968785592be55ff779e573c776d85437e04
SHA512 30b2a812bdb0c4caeccf542fe5c07e81c21c50d3211f4526bfba69b6473592577aebf7488c622167c7ffe5fd0cb5f4dfcf0c1d9795cd2416ad0509ac44c01ce8

Analysis: behavioral2

Detonation Overview

Submitted

2023-03-12 01:44

Reported

2023-03-12 01:46

Platform

win10v2004-20230220-en

Max time kernel

85s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe"

Signatures

BlackMatter Ransomware

ransomware blackmatter

Modifies extensions of user files

ransomware
Description Indicator Process Target
File renamed C:\Users\Admin\Pictures\FindExpand.png => C:\Users\Admin\Pictures\FindExpand.png.kuwiiv4i7 C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
File opened for modification C:\Users\Admin\Pictures\FindExpand.png.kuwiiv4i7 C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
File renamed C:\Users\Admin\Pictures\ReadMerge.png => C:\Users\Admin\Pictures\ReadMerge.png.kuwiiv4i7 C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
File opened for modification C:\Users\Admin\Pictures\ReadMerge.png.kuwiiv4i7 C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
File opened for modification C:\Users\Admin\Pictures\EnterDismount.tiff C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\kuwiiv4i7.bmp" C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\kuwiiv4i7.bmp" C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A

Modifies Control Panel

evasion
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\Desktop\WallpaperStyle = "10" C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Key created \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\Desktop C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\kuwiiv4i7\DefaultIcon C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\kuwiiv4i7 C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\kuwiiv4i7\DefaultIcon\ = "C:\\ProgramData\\kuwiiv4i7.ico" C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.kuwiiv4i7 C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.kuwiiv4i7\ = "kuwiiv4i7" C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: 36 N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeImpersonatePrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.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\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe

"C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
US 8.8.8.8:53 210.81.184.52.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
BG 213.91.128.133:10060 tcp
US 20.189.173.5:443 tcp
US 8.8.8.8:53 151.122.125.40.in-addr.arpa udp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 8.8.8.8:53 113.238.32.23.in-addr.arpa udp
US 8.8.8.8:53 76.38.195.152.in-addr.arpa udp
US 8.8.8.8:53 45.8.109.52.in-addr.arpa udp
NL 8.238.177.126:80 tcp

Files

memory/2144-133-0x00000000026C0000-0x00000000026D0000-memory.dmp

memory/2144-134-0x00000000026C0000-0x00000000026D0000-memory.dmp

memory/2144-135-0x00000000026C0000-0x00000000026D0000-memory.dmp

\Device\HarddiskVolume1\kuwiiv4i7.README.txt

MD5 a34fb07ce7696459f74aef7fefb56352
SHA1 dbd83ff37e90810eb57a802464ac5458ee092d5d
SHA256 b5497509edf9a86d80038354f2f07968785592be55ff779e573c776d85437e04
SHA512 30b2a812bdb0c4caeccf542fe5c07e81c21c50d3211f4526bfba69b6473592577aebf7488c622167c7ffe5fd0cb5f4dfcf0c1d9795cd2416ad0509ac44c01ce8