Analysis Overview
SHA256
b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f
Threat Level: Known bad
The file 1dd464cbb3fbd6881eef3f05b8b1fbd5 was found to be: Known bad.
Malicious Activity Summary
Blackmatter family
BlackMatter Ransomware
Renames multiple (150) files with added filename extension
Renames multiple (169) files with added filename extension
Sets desktop wallpaper using registry
Suspicious use of NtSetInformationThreadHideFromDebugger
Unsigned PE
Enumerates physical storage devices
Opens file in notepad (likely ransom note)
Suspicious behavior: EnumeratesProcesses
Modifies Control Panel
Uses Volume Shadow Copy service COM API
Suspicious use of SetWindowsHookEx
Modifies registry class
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-12-30 21:59
Signatures
Blackmatter family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2023-12-30 21:59
Reported
2024-01-01 07:55
Platform
win7-20231215-en
Max time kernel
122s
Max time network
123s
Command Line
Signatures
BlackMatter Ransomware
Renames multiple (169) files with added filename extension
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\5XCNh4eNc.bmp" | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\5XCNh4eNc.bmp" | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
Enumerates physical storage devices
Modifies Control Panel
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000\Control Panel\Desktop | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000\Control Panel\Desktop\WallpaperStyle = "10" | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f4225481e03947bc34db131e946b44c8dd50000 | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 | C:\Windows\splwow64.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\NodeSlot = "1" | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = ffffffff | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1 | C:\Windows\splwow64.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_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-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff | C:\Windows\splwow64.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_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-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\TV_TopViewID = "{82BA0782-5B7A-4569-B5D7-EC83085F08CC}" | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_Classes\Local Settings | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 9e0000001a00eebbfe23000010007db10d7bd29c934a973346cc89022e7c00002a0000000000efbe000000200000000000000000000000000000000000000000000000000100000020002a0000000000efbe7e47b3fbe4c93b4ba2bad3f5d3cd46f98207ba827a5b6945b5d7ec83085f08cc20002a0000000000efbe000000200000000000000000000000000000000000000000000000000100000020000000 | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02 | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags | 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\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.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 2516 wrote to memory of 2092 | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | C:\Windows\SysWOW64\NOTEPAD.EXE |
| PID 2516 wrote to memory of 2092 | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | C:\Windows\SysWOW64\NOTEPAD.EXE |
| PID 2516 wrote to memory of 2092 | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | C:\Windows\SysWOW64\NOTEPAD.EXE |
| PID 2516 wrote to memory of 2092 | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | C:\Windows\SysWOW64\NOTEPAD.EXE |
| PID 2092 wrote to memory of 2496 | N/A | C:\Windows\SysWOW64\NOTEPAD.EXE | C:\Windows\splwow64.exe |
| PID 2092 wrote to memory of 2496 | N/A | C:\Windows\SysWOW64\NOTEPAD.EXE | C:\Windows\splwow64.exe |
| PID 2092 wrote to memory of 2496 | N/A | C:\Windows\SysWOW64\NOTEPAD.EXE | C:\Windows\splwow64.exe |
| PID 2092 wrote to memory of 2496 | 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\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe
"C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
C:\Windows\SysWOW64\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" /p C:\5XCNh4eNc.README.txt
C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
Network
Files
memory/2516-0-0x0000000000370000-0x00000000003B0000-memory.dmp
C:\Users\5XCNh4eNc.README.txt
| MD5 | c4947c60a66a5f286be734256b7e6e8d |
| SHA1 | 7cd483bbe59972ff22b2c122c08548933e812b66 |
| SHA256 | 5119a7a0a3c668d897f1e33f1b39f3c78396a057b3efa58858c4b86878cce373 |
| SHA512 | ec43f7e65055d471c5f78d9777c0de661690a51da2f905467177c8a433468a74f546d2cac32f3881b75cdbfeabbff4e3ceaef10e181cdb2b5ae70f06875b2565 |
memory/2496-213-0x00000000044B0000-0x00000000044B1000-memory.dmp
C:\Users\Admin\Documents\PingImport.xps.5XCNh4eNc
| MD5 | c36336988f677353fef9f0435267f8e1 |
| SHA1 | 62a08fa1e0cd07b7628142fdac6c303e8e320fc3 |
| SHA256 | 4ef42c0afc38825c9d08ce4760bb083d98456c04c44b25cead51d9ddc34141da |
| SHA512 | bcde5b54be19a329e7bb743a6fbfb91dcc2b74e39c714e2c8a138a646ef243f8c51cb4f686e603cb44d1fe540fa46923822a4a48da0cfc0318c74df3dab48d36 |
C:\Users\Admin\Documents\UnregisterMerge.xps.5XCNh4eNc
| MD5 | 7f5e017221af35b564ff3f7ccf8697b0 |
| SHA1 | 2d81ff936ba0e0ecd5f34f2040186e3974c654fe |
| SHA256 | 0382b2c34c2433999ddb9337c5dd743b67a508372c67977b2fae0e67d4dad79a |
| SHA512 | 3ed7cb7e19b17abea80eb156036f09179272fa5cbb672458dc772b56294d09d79141e6bc9913879cccd1d143b12586e2e4543019e3db42492cfa3ff12cd3af03 |
memory/2496-216-0x00000000044B0000-0x00000000044B1000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2023-12-30 21:59
Reported
2024-01-01 07:56
Platform
win10v2004-20231215-en
Max time kernel
98s
Max time network
167s
Command Line
Signatures
BlackMatter Ransomware
Renames multiple (150) files with added filename extension
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\jHFUHx9Uc.bmp" | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\jHFUHx9Uc.bmp" | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
Modifies Control Panel
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\Desktop | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\Desktop\WallpaperStyle = "10" | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Uses Volume Shadow Copy service COM API
Processes
C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe
"C:\Users\Admin\AppData\Local\Temp\1dd464cbb3fbd6881eef3f05b8b1fbd5.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
Network
| Country | Destination | Domain | Proto |
| US | 138.91.171.81:80 | tcp | |
| US | 8.8.8.8:53 | 68.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 180.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 158.240.127.40.in-addr.arpa | udp |
| 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 | 21.177.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 146.78.124.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.136.104.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| 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 | 8.8.8.8:53 | 173.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 194.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |
Files
memory/1276-0-0x0000000002BC0000-0x0000000002BD0000-memory.dmp
memory/1276-1-0x0000000002BC0000-0x0000000002BD0000-memory.dmp
C:\Users\jHFUHx9Uc.README.txt
| MD5 | c4947c60a66a5f286be734256b7e6e8d |
| SHA1 | 7cd483bbe59972ff22b2c122c08548933e812b66 |
| SHA256 | 5119a7a0a3c668d897f1e33f1b39f3c78396a057b3efa58858c4b86878cce373 |
| SHA512 | ec43f7e65055d471c5f78d9777c0de661690a51da2f905467177c8a433468a74f546d2cac32f3881b75cdbfeabbff4e3ceaef10e181cdb2b5ae70f06875b2565 |