Analysis Overview
SHA256
3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40
Threat Level: Known bad
The file 3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40 was found to be: Known bad.
Malicious Activity Summary
BlackMatter Ransomware
suricata: ET MALWARE BlackMatter CnC Domain in DNS Lookup (nowautomation .com)
Blackmatter family
suricata: ET MALWARE BlackMatter CnC Domain in DNS Lookup (mojobiden .com)
Modifies extensions of user files
Enumerates connected drives
Suspicious use of NtSetInformationThreadHideFromDebugger
Sets desktop wallpaper using registry
Enumerates physical storage devices
Modifies Control Panel
Suspicious use of WriteProcessMemory
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of SetWindowsHookEx
Modifies registry class
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Opens file in notepad (likely ransom note)
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2021-10-05 10:29
Signatures
Blackmatter family
Analysis: behavioral2
Detonation Overview
Submitted
2021-10-05 10:29
Reported
2021-10-05 10:32
Platform
win10-en-20210920
Max time kernel
149s
Max time network
152s
Command Line
Signatures
BlackMatter Ransomware
suricata: ET MALWARE BlackMatter CnC Domain in DNS Lookup (mojobiden .com)
suricata: ET MALWARE BlackMatter CnC Domain in DNS Lookup (nowautomation .com)
Modifies extensions of user files
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\Z: | C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe | N/A |
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\AVx2lZV2X.bmp" | C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\AVx2lZV2X.bmp" | C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
Modifies Control Panel
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Control Panel\International | C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Control Panel\Desktop | C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Control Panel\Desktop\WallpaperStyle = "10" | C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Processes
C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe
"C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | mojobiden.com | udp |
| US | 8.8.8.8:53 | nowautomation.com | udp |
Files
memory/2352-115-0x0000000002913000-0x0000000002915000-memory.dmp
memory/2352-116-0x0000000002910000-0x0000000002911000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2021-10-05 10:29
Reported
2021-10-05 10:33
Platform
win7v20210408
Max time kernel
149s
Max time network
64s
Command Line
Signatures
BlackMatter Ransomware
suricata: ET MALWARE BlackMatter CnC Domain in DNS Lookup (mojobiden .com)
suricata: ET MALWARE BlackMatter CnC Domain in DNS Lookup (nowautomation .com)
Modifies extensions of user files
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\1rWCqamCt.bmp" | C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\1rWCqamCt.bmp" | C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
Enumerates physical storage devices
Modifies Control Panel
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\International | C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop | C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop\WallpaperStyle = "10" | C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (data) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02 | C:\Windows\splwow64.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\NodeSlot = "1" | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1 | C:\Windows\splwow64.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_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-1-5-21-2455352368-1077083310-2879168483-1000_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-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = ffffffff | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_Classes\Local Settings | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags | C:\Windows\splwow64.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\TV_FolderType = "{FBB3477E-C9E4-4B3B-A2BA-D3F5D3CD46F9}" | C:\Windows\splwow64.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f4225481e03947bc34db131e946b44c8dd50000 | C:\Windows\splwow64.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 9e0000001a00eebbfe23000010007db10d7bd29c934a973346cc89022e7c00002a0000000000efbe000000200000000000000000000000000000000000000000000000000100000020002a0000000000efbe7e47b3fbe4c93b4ba2bad3f5d3cd46f98207ba827a5b6945b5d7ec83085f08cc20002a0000000000efbe000000200000000000000000000000000000000000000000000000000100000020000000 | 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
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
Processes
C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe
"C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
C:\Windows\SysWOW64\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" /p C:\1rWCqamCt.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 | 8.8.8.8:53 | nowautomation.com | udp |
Files
memory/1968-59-0x00000000767B1000-0x00000000767B3000-memory.dmp
memory/1968-60-0x0000000000875000-0x0000000000886000-memory.dmp
memory/1968-61-0x0000000000870000-0x0000000000871000-memory.dmp
memory/1968-62-0x0000000000886000-0x0000000000887000-memory.dmp
memory/1952-63-0x0000000000000000-mapping.dmp
C:\1rWCqamCt.README.txt
| MD5 | 5fc34d51147df5696554dd7cca4febaa |
| SHA1 | cc58005940434a64e8c1f18a1a645a09869abeb4 |
| SHA256 | a811e4d76dc3a6014a3a41a6692a09ce82a0f28276df1b9252b87894a69e3fce |
| SHA512 | 1a50b466e43259b2f7faf5a472759a8a355609186bd1227dcf64309a3e9eab7d258c0d8931d4c283156a61558b678c1563a6ea05dfe489f75316b1b3c7e9da23 |
memory/1456-66-0x0000000000000000-mapping.dmp
memory/1456-67-0x000007FEFC051000-0x000007FEFC053000-memory.dmp
memory/1456-68-0x0000000004150000-0x0000000004151000-memory.dmp