Analysis Overview
SHA256
b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f
Threat Level: Known bad
The file b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f was found to be: Known bad.
Malicious Activity Summary
Blackmatter family
BlackMatter Ransomware
Modifies extensions of user files
Enumerates connected drives
Sets desktop wallpaper using registry
Suspicious use of NtSetInformationThreadHideFromDebugger
Program crash
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies Control Panel
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2021-10-05 12:34
Signatures
Blackmatter family
Analysis: behavioral2
Detonation Overview
Submitted
2021-10-05 12:34
Reported
2021-10-05 12:37
Platform
win10-en-20210920
Max time kernel
117s
Max time network
120s
Command Line
Signatures
BlackMatter Ransomware
Modifies extensions of user files
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\Z: | C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.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\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.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\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.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\Desktop | C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.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\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Processes
C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe
"C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
Network
Files
memory/2136-115-0x0000000000F33000-0x0000000000F35000-memory.dmp
memory/2136-116-0x0000000000F30000-0x0000000000F31000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2021-10-05 12:34
Reported
2021-10-05 12:38
Platform
win7v20210408
Max time kernel
106s
Max time network
38s
Command Line
Signatures
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe | N/A |
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 572 wrote to memory of 628 | N/A | C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe | C:\Windows\SysWOW64\WerFault.exe |
| PID 572 wrote to memory of 628 | N/A | C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe | C:\Windows\SysWOW64\WerFault.exe |
| PID 572 wrote to memory of 628 | N/A | C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe | C:\Windows\SysWOW64\WerFault.exe |
| PID 572 wrote to memory of 628 | N/A | C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe | C:\Windows\SysWOW64\WerFault.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe
"C:\Users\Admin\AppData\Local\Temp\b824bbc645f15e213b4cb2628f7d383e9e37282059b03f6fe60f7c84ea1fed1f.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 572 -s 372
Network
Files
memory/572-59-0x00000000757C1000-0x00000000757C3000-memory.dmp
memory/572-60-0x0000000001ED5000-0x0000000001EE6000-memory.dmp
memory/572-61-0x0000000001ED0000-0x0000000001ED1000-memory.dmp
memory/628-62-0x0000000000000000-mapping.dmp
memory/628-63-0x0000000000340000-0x0000000000341000-memory.dmp