Malware Analysis Report

2024-10-16 03:21

Sample ID 231220-t1px7scbfj
Target e88479a6a059eb522d2fec40fe2e1a88
SHA256 ccee26ea662c87a6c3171b091044282849cc8d46d4b9b9da6cf429b8114c4239
Tags
58c572785e542f3750b57601df612fc4 blackmatter ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

ccee26ea662c87a6c3171b091044282849cc8d46d4b9b9da6cf429b8114c4239

Threat Level: Known bad

The file e88479a6a059eb522d2fec40fe2e1a88 was found to be: Known bad.

Malicious Activity Summary

58c572785e542f3750b57601df612fc4 blackmatter ransomware

Blackmatter family

BlackMatter Ransomware

Renames multiple (159) files with added filename extension

Renames multiple (127) files with added filename extension

Sets desktop wallpaper using registry

Suspicious use of NtSetInformationThreadHideFromDebugger

Unsigned PE

Modifies Control Panel

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Uses Volume Shadow Copy service COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-20 16:31

Signatures

Blackmatter family

blackmatter

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-20 16:31

Reported

2023-12-21 02:33

Platform

win7-20231129-en

Max time kernel

120s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe"

Signatures

BlackMatter Ransomware

ransomware blackmatter

Renames multiple (127) files with added filename extension

ransomware

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3470981204-343661084-3367201002-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\krIQ2dkQs.bmp" C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3470981204-343661084-3367201002-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\krIQ2dkQs.bmp" C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A

Modifies Control Panel

evasion
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3470981204-343661084-3367201002-1000\Control Panel\Desktop C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3470981204-343661084-3367201002-1000\Control Panel\Desktop\WallpaperStyle = "10" C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: 36 N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeImpersonatePrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.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\e88479a6a059eb522d2fec40fe2e1a88.exe

"C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

N/A

Files

memory/2892-0-0x0000000000300000-0x0000000000340000-memory.dmp

C:\krIQ2dkQs.README.txt

MD5 437cb918360e1d94c6f19a85ddd428a6
SHA1 30e3c0c3aed4054285fef804ebc75dc412fcbf41
SHA256 f99625bb156ed0b20feac08c71839cc2f03bee9701e83bd60fcc4b747ba726b4
SHA512 3aac087bdcfcda772c46b208118a223f577a81277e95c73641cefb30ff6d5d50f2a7b73697927d5ca4f23ff10614a60d7867f5af0a7ccf8a5e14d9d022a3c9b7

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-20 16:31

Reported

2023-12-21 02:33

Platform

win10v2004-20231215-en

Max time kernel

131s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe"

Signatures

BlackMatter Ransomware

ransomware blackmatter

Renames multiple (159) files with added filename extension

ransomware

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\roQADg4Ah.bmp" C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\roQADg4Ah.bmp" C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A

Modifies Control Panel

evasion
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\Desktop C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\Desktop\WallpaperStyle = "10" C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: 36 N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeImpersonatePrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.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\e88479a6a059eb522d2fec40fe2e1a88.exe

"C:\Users\Admin\AppData\Local\Temp\e88479a6a059eb522d2fec40fe2e1a88.exe"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 19.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

memory/896-1-0x0000000002A30000-0x0000000002A40000-memory.dmp

memory/896-0-0x0000000002A30000-0x0000000002A40000-memory.dmp

F:\roQADg4Ah.README.txt

MD5 437cb918360e1d94c6f19a85ddd428a6
SHA1 30e3c0c3aed4054285fef804ebc75dc412fcbf41
SHA256 f99625bb156ed0b20feac08c71839cc2f03bee9701e83bd60fcc4b747ba726b4
SHA512 3aac087bdcfcda772c46b208118a223f577a81277e95c73641cefb30ff6d5d50f2a7b73697927d5ca4f23ff10614a60d7867f5af0a7ccf8a5e14d9d022a3c9b7