Analysis Overview
SHA256
6d4712df42ad0982041ef0e2e109ab5718b43830f2966bd9207a7fac3af883db
Threat Level: Known bad
The file 10aa058a3ac49e016cad7987b8e09886 was found to be: Known bad.
Malicious Activity Summary
BlackMatter Ransomware
Blackmatter family
Renames multiple (178) files with added filename extension
Suspicious use of NtSetInformationThreadHideFromDebugger
Sets desktop wallpaper using registry
Unsigned PE
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Modifies Control Panel
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Uses Volume Shadow Copy service COM API
Modifies registry class
Suspicious use of WriteProcessMemory
Suspicious behavior: GetForegroundWindowSpam
Opens file in notepad (likely ransom note)
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-12-30 06:06
Signatures
Blackmatter family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2023-12-30 06:06
Reported
2024-01-01 03:52
Platform
win10v2004-20231215-en
Command Line
Signatures
Processes
Network
Files
Analysis: behavioral1
Detonation Overview
Submitted
2023-12-30 06:06
Reported
2024-01-01 03:52
Platform
win7-20231215-en
Max time kernel
129s
Max time network
125s
Command Line
Signatures
BlackMatter Ransomware
Renames multiple (178) files with added filename extension
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\BzOXaWmXM.bmp" | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\BzOXaWmXM.bmp" | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
Enumerates physical storage devices
Modifies Control Panel
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Control Panel\International | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Control Panel\Desktop | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Control Panel\Desktop\WallpaperStyle = "10" | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 9e0000001a00eebbfe23000010007db10d7bd29c934a973346cc89022e7c00002a0000000000efbe000000200000000000000000000000000000000000000000000000000100000020002a0000000000efbe7e47b3fbe4c93b4ba2bad3f5d3cd46f98207ba827a5b6945b5d7ec83085f08cc20002a0000000000efbe000000200000000000000000000000000000000000000000000000000100000020000000 | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = ffffffff | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_Classes\Local Settings | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f4225481e03947bc34db131e946b44c8dd50000 | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02 | C:\Windows\splwow64.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\NodeSlot = "1" | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1 | C:\Windows\splwow64.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_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 (str) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_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 (int) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\TV_TopViewVersion = "0" | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff | C:\Windows\splwow64.exe | N/A |
Opens file in notepad (likely ransom note)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\NOTEPAD.EXE | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\splwow64.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\splwow64.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2976 wrote to memory of 2752 | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | C:\Windows\SysWOW64\NOTEPAD.EXE |
| PID 2976 wrote to memory of 2752 | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | C:\Windows\SysWOW64\NOTEPAD.EXE |
| PID 2976 wrote to memory of 2752 | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | C:\Windows\SysWOW64\NOTEPAD.EXE |
| PID 2976 wrote to memory of 2752 | N/A | C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe | C:\Windows\SysWOW64\NOTEPAD.EXE |
| PID 2752 wrote to memory of 2328 | N/A | C:\Windows\SysWOW64\NOTEPAD.EXE | C:\Windows\splwow64.exe |
| PID 2752 wrote to memory of 2328 | N/A | C:\Windows\SysWOW64\NOTEPAD.EXE | C:\Windows\splwow64.exe |
| PID 2752 wrote to memory of 2328 | N/A | C:\Windows\SysWOW64\NOTEPAD.EXE | C:\Windows\splwow64.exe |
| PID 2752 wrote to memory of 2328 | N/A | C:\Windows\SysWOW64\NOTEPAD.EXE | C:\Windows\splwow64.exe |
Uses Volume Shadow Copy service COM API
Processes
C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe
"C:\Users\Admin\AppData\Local\Temp\10aa058a3ac49e016cad7987b8e09886.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
C:\Windows\SysWOW64\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" /p C:\BzOXaWmXM.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/2976-0-0x00000000003E0000-0x0000000000420000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\Cab7429.tmp
| MD5 | ac05d27423a85adc1622c714f2cb6184 |
| SHA1 | b0fe2b1abddb97837ea0195be70ab2ff14d43198 |
| SHA256 | c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d |
| SHA512 | 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d |
C:\Users\Admin\AppData\Local\Temp\Tar747A.tmp
| MD5 | 9c0c641c06238516f27941aa1166d427 |
| SHA1 | 64cd549fb8cf014fcd9312aa7a5b023847b6c977 |
| SHA256 | 4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f |
| SHA512 | 936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06 |
C:\BzOXaWmXM.README.txt
| MD5 | 9be52968352d6207153fd7a6b8fcb75f |
| SHA1 | e9a821e195712d6f585a2cd60d91b606cad7110e |
| SHA256 | 5b5d55b03b22a3611662bd521983fb05da9df710c4a9d7831321c9d983d6c41e |
| SHA512 | 1b35ee275af4edf106ca4f80c35419f8ff338e1905bfd0da5992da48eeed5c842215edef55d4fb7e9c2678f734c40bb4d51d7a8e3a4886610963f09a655b8c45 |
memory/2328-437-0x00000000042E0000-0x00000000042E1000-memory.dmp
memory/2328-438-0x0000000004350000-0x0000000004360000-memory.dmp
memory/2328-439-0x00000000042E0000-0x00000000042E1000-memory.dmp