Analysis Overview
SHA256
b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6
Threat Level: Known bad
The file b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6.sample was found to be: Known bad.
Malicious Activity Summary
Egregor Ransomware
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Analysis: static1
Detonation Overview
Reported
2021-07-26 12:40
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2021-07-26 12:40
Reported
2021-07-26 12:49
Platform
win7v20210408
Max time kernel
4s
Max time network
36s
Command Line
Signatures
Egregor Ransomware
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 752 wrote to memory of 1572 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 752 wrote to memory of 1572 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 752 wrote to memory of 1572 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 752 wrote to memory of 1572 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 752 wrote to memory of 1572 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 752 wrote to memory of 1572 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 752 wrote to memory of 1572 | 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\b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6.sample.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6.sample.dll
Network
Files
memory/752-59-0x000007FEFB7B1000-0x000007FEFB7B3000-memory.dmp
memory/1572-60-0x0000000000000000-mapping.dmp
memory/1572-61-0x0000000075451000-0x0000000075453000-memory.dmp
memory/1572-62-0x00000000001D0000-0x000000000020F000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2021-07-26 12:40
Reported
2021-07-26 12:48
Platform
win10v20210410
Max time kernel
14s
Max time network
116s
Command Line
Signatures
Egregor Ransomware
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3624 wrote to memory of 1012 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 3624 wrote to memory of 1012 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 3624 wrote to memory of 1012 | 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\b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6.sample.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6.sample.dll
Network
Files
memory/1012-114-0x0000000000000000-mapping.dmp
memory/1012-115-0x0000000004810000-0x000000000484F000-memory.dmp