Malware Analysis Report

2024-10-16 03:21

Sample ID 240110-rg7b2ahgb9
Target 50c4970003a84cab1bf2634631fe39d7
SHA256 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57
Tags
24483508bccfe72e63b26a1233058170 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

520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57

Threat Level: Known bad

The file 50c4970003a84cab1bf2634631fe39d7 was found to be: Known bad.

Malicious Activity Summary

24483508bccfe72e63b26a1233058170 blackmatter ransomware

Blackmatter family

BlackMatter Ransomware

Renames multiple (151) files with added filename extension

Renames multiple (167) files with added filename extension

Enumerates connected drives

Sets desktop wallpaper using registry

Suspicious use of NtSetInformationThreadHideFromDebugger

Enumerates physical storage devices

Unsigned PE

Uses Volume Shadow Copy service COM API

Suspicious use of SetWindowsHookEx

Modifies registry class

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Modifies Control Panel

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-01-10 14:10

Signatures

Blackmatter family

blackmatter

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-10 14:10

Reported

2024-01-10 14:15

Platform

win7-20231215-en

Max time kernel

191s

Max time network

210s

Command Line

"C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe"

Signatures

BlackMatter Ransomware

ransomware blackmatter

Renames multiple (167) files with added filename extension

ransomware

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\fhe6gYG6F.bmp" C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\fhe6gYG6F.bmp" C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A

Enumerates physical storage devices

Modifies Control Panel

evasion
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000\Control Panel\International C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000\Control Panel\Desktop C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000\Control Panel\Desktop\WallpaperStyle = "10" C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (int) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\NodeSlot = "1" C:\Windows\splwow64.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_Classes\Local Settings C:\Windows\splwow64.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 C:\Windows\splwow64.exe N/A
Set value (data) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff C:\Windows\splwow64.exe N/A
Set value (data) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02 C:\Windows\splwow64.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU C:\Windows\splwow64.exe N/A
Set value (data) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f4225481e03947bc34db131e946b44c8dd50000 C:\Windows\splwow64.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\TV_TopViewID = "{82BA0782-5B7A-4569-B5D7-EC83085F08CC}" C:\Windows\splwow64.exe N/A
Set value (data) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = ffffffff C:\Windows\splwow64.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg C:\Windows\splwow64.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\TV_FolderType = "{FBB3477E-C9E4-4B3B-A2BA-D3F5D3CD46F9}" C:\Windows\splwow64.exe N/A
Set value (data) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots C:\Windows\splwow64.exe N/A
Set value (data) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff C:\Windows\splwow64.exe N/A
Set value (data) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 9e0000001a00eebbfe23000010007db10d7bd29c934a973346cc89022e7c00002a0000000000efbe000000200000000000000000000000000000000000000000000000000100000020002a0000000000efbe7e47b3fbe4c93b4ba2bad3f5d3cd46f98207ba827a5b6945b5d7ec83085f08cc20002a0000000000efbe000000200000000000000000000000000000000000000000000000000100000020000000 C:\Windows\splwow64.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 C:\Windows\splwow64.exe N/A
Set value (int) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\TV_TopViewVersion = "0" C:\Windows\splwow64.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell C:\Windows\splwow64.exe N/A
Set value (data) \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff C:\Windows\splwow64.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags C:\Windows\splwow64.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3308111660-3636268597-2291490419-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1 C:\Windows\splwow64.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: 36 N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeImpersonatePrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.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

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\splwow64.exe N/A

Uses Volume Shadow Copy service COM API

ransomware

Processes

C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe

"C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\SysWOW64\NOTEPAD.EXE

"C:\Windows\system32\NOTEPAD.EXE" /p F:\fhe6gYG6F.README.txt

C:\Windows\splwow64.exe

C:\Windows\splwow64.exe 12288

Network

Country Destination Domain Proto
US 8.8.8.8:53 mojobiden.com udp
US 3.33.130.190:443 mojobiden.com tcp
US 3.33.130.190:80 mojobiden.com tcp
US 3.33.130.190:443 mojobiden.com tcp
US 3.33.130.190:443 mojobiden.com tcp
US 3.33.130.190:443 mojobiden.com tcp

Files

memory/3000-0-0x0000000001CC0000-0x0000000001D00000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Cab6431.tmp

MD5 ac05d27423a85adc1622c714f2cb6184
SHA1 b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA512 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

C:\Users\Admin\AppData\Local\Temp\Tar6463.tmp

MD5 9c0c641c06238516f27941aa1166d427
SHA1 64cd549fb8cf014fcd9312aa7a5b023847b6c977
SHA256 4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f
SHA512 936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

F:\fhe6gYG6F.README.txt

MD5 8d8f960af0181c4ecbb0ae3d7572199c
SHA1 32169e6bec91a3275c4608120d1ba34bdbd6a004
SHA256 29181bf7ae071329e459ad38efc9986f2ff83a8d83a212f06514806d86129296
SHA512 941d22ed2163e238d3db2d72e1f0f4e59cb4924e69bc178672c7e07b84dfadfe0198ef3c7a84c47e78a1c753fbc3472798fc8466ef865aa493b75fa27f5a2de2

memory/2940-446-0x00000000040E0000-0x00000000040E1000-memory.dmp

C:\Users\Admin\Documents\ReadGrant.xps.fhe6gYG6F

MD5 18b17b8add7aa897e0c181b622161e91
SHA1 234744a08807b8d4c4a9599727eb39e16be83de7
SHA256 e544a8d79ba10ddd2007d3f34d8d04a3c2ac3b24eee586fb8c7d3cbccac50daa
SHA512 ff4574e13f875eaebb3783820548577f7ee95d5cb81fa7d9efea7b696ed3b57b2859830cc991d71ce45230a63b865c5bad918c59944abd5735dd943e02a9ec53

memory/2940-448-0x00000000040E0000-0x00000000040E1000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-10 14:10

Reported

2024-01-10 14:13

Platform

win10v2004-20231215-en

Max time kernel

153s

Max time network

170s

Command Line

"C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe"

Signatures

BlackMatter Ransomware

ransomware blackmatter

Renames multiple (151) files with added filename extension

ransomware

Sets desktop wallpaper using registry

ransomware
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\I92w9iew3.bmp" C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\I92w9iew3.bmp" C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A

Modifies Control Panel

evasion
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\Desktop C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\Desktop\WallpaperStyle = "10" C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Key created \REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: 36 N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeImpersonatePrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.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\50c4970003a84cab1bf2634631fe39d7.exe

"C:\Users\Admin\AppData\Local\Temp\50c4970003a84cab1bf2634631fe39d7.exe"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 84.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 mojobiden.com udp
US 3.33.130.190:443 mojobiden.com tcp
US 8.8.8.8:53 180.178.17.96.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 8.8.8.8:53 190.130.33.3.in-addr.arpa udp
US 8.8.8.8:53 41.249.124.192.in-addr.arpa udp
US 138.91.171.81:80 tcp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 crl.godaddy.com udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 192.124.249.31:80 crl.godaddy.com tcp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 31.249.124.192.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 3.33.130.190:80 mojobiden.com tcp
US 3.33.130.190:443 mojobiden.com tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 200.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 232.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 88.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 208.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 181.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 90.16.208.104.in-addr.arpa udp

Files

memory/1752-0-0x0000000002410000-0x0000000002420000-memory.dmp

memory/1752-1-0x0000000002410000-0x0000000002420000-memory.dmp

F:\I92w9iew3.README.txt

MD5 8d8f960af0181c4ecbb0ae3d7572199c
SHA1 32169e6bec91a3275c4608120d1ba34bdbd6a004
SHA256 29181bf7ae071329e459ad38efc9986f2ff83a8d83a212f06514806d86129296
SHA512 941d22ed2163e238d3db2d72e1f0f4e59cb4924e69bc178672c7e07b84dfadfe0198ef3c7a84c47e78a1c753fbc3472798fc8466ef865aa493b75fa27f5a2de2

memory/1752-247-0x0000000002410000-0x0000000002420000-memory.dmp

memory/1752-248-0x0000000002410000-0x0000000002420000-memory.dmp