Analysis Overview
SHA256
3fd510a3b2e0b0802d57cd5b1cac1e61797d50a08b87d9b5243becd9e2f7073f
Threat Level: Known bad
The file 3fd510a3 was found to be: Known bad.
Malicious Activity Summary
Egregor Ransomware
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Analysis: static1
Detonation Overview
Reported
2021-11-05 17:14
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2021-11-05 17:14
Reported
2021-11-05 17:16
Platform
win7-en-20211104
Max time kernel
120s
Max time network
125s
Command Line
Signatures
Egregor Ransomware
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1112 wrote to memory of 1872 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1112 wrote to memory of 1872 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1112 wrote to memory of 1872 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1112 wrote to memory of 1872 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1112 wrote to memory of 1872 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1112 wrote to memory of 1872 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1112 wrote to memory of 1872 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
Processes
C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\3fd510a3.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\3fd510a3.dll
Network
Files
memory/1112-55-0x000007FEFC511000-0x000007FEFC513000-memory.dmp
memory/1872-56-0x0000000000000000-mapping.dmp
memory/1872-57-0x0000000075801000-0x0000000075803000-memory.dmp
memory/1872-60-0x0000000000330000-0x000000000036F000-memory.dmp
memory/1872-63-0x0000000000330000-0x00000000003B0000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2021-11-05 17:14
Reported
2021-11-05 17:16
Platform
win10-en-20211104
Max time kernel
121s
Max time network
128s
Command Line
Signatures
Egregor Ransomware
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4332 wrote to memory of 4036 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 4332 wrote to memory of 4036 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 4332 wrote to memory of 4036 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
Processes
C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\3fd510a3.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\3fd510a3.dll
Network
| Country | Destination | Domain | Proto |
| US | 52.109.8.20:443 | tcp | |
| US | 8.8.8.8:53 | time.windows.com | udp |
| NL | 40.119.148.38:123 | time.windows.com | udp |
Files
memory/4036-118-0x0000000000000000-mapping.dmp
memory/4036-119-0x0000000000060000-0x000000000009F000-memory.dmp