Analysis Overview
SHA256
f1d57ed2b3e2deff7a13ddb4682a81d2543bc5bdca1ec934833a38b8e9f18077
Threat Level: Known bad
The file t5.zip was found to be: Known bad.
Malicious Activity Summary
Egregor Ransomware
Modifies extensions of user files
Reads user/profile data of web browsers
Drops startup file
Modifies service
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: RenamesItself
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2020-11-04 21:31
Signatures
Analysis: behavioral4
Detonation Overview
Submitted
2020-11-04 21:31
Reported
2020-11-04 21:34
Platform
win10v20201028
Max time kernel
19s
Max time network
117s
Command Line
Signatures
Egregor Ransomware
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\e6189640.lnk | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\RECOVER-FILES.txt | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e6189640.lnk | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RECOVER-FILES.txt | C:\Windows\SysWOW64\rundll32.exe | N/A |
Reads user/profile data of web browsers
Modifies service
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\COM+ REGDB Writer | C:\Windows\system32\vssvc.exe | N/A |
| Key created | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\ASR Writer | C:\Windows\system32\vssvc.exe | N/A |
| Key created | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Shadow Copy Optimization Writer | C:\Windows\system32\vssvc.exe | N/A |
| Key created | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\SwProvider_{b5946137-7b9f-4925-af80-51abd60b20d5} | C:\Windows\system32\vssvc.exe | N/A |
| Key created | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer | C:\Windows\system32\vssvc.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files\RECOVER-FILES.txt | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File created | C:\Program Files (x86)\RECOVER-FILES.txt | C:\Windows\SysWOW64\rundll32.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\RECOVER-FILES.txt | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: RenamesItself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeBackupPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeRestorePrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeAuditPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4768 wrote to memory of 4928 | N/A | C:\Windows\system32\cmd.exe | C:\Windows\system32\rundll32.exe |
| PID 4768 wrote to memory of 4928 | N/A | C:\Windows\system32\cmd.exe | C:\Windows\system32\rundll32.exe |
| PID 4928 wrote to memory of 4976 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 4928 wrote to memory of 4976 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 4928 wrote to memory of 4976 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
Processes
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\spr3.bat"
C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\sm.dll",DllRegisterServer --passegregor10 --append="antani" --multiproc
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\sm.dll",DllRegisterServer --passegregor10 --append="antani" --multiproc
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
Network
Files
memory/4928-0-0x0000000000000000-mapping.dmp
memory/4976-1-0x0000000000000000-mapping.dmp
memory/4976-2-0x0000000004980000-0x00000000049BF000-memory.dmp
memory/4976-4-0x0000000004AA0000-0x0000000004ACA000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2020-11-04 21:31
Reported
2020-11-04 21:34
Platform
win7v20201028
Max time kernel
135s
Max time network
137s
Command Line
Signatures
Egregor Ransomware
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1080 wrote to memory of 1128 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1080 wrote to memory of 1128 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1080 wrote to memory of 1128 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1080 wrote to memory of 1128 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1080 wrote to memory of 1128 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1080 wrote to memory of 1128 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1080 wrote to memory of 1128 | 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\sm.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\sm.dll
Network
Files
memory/1128-0-0x0000000000000000-mapping.dmp
memory/1128-1-0x0000000000240000-0x000000000027F000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2020-11-04 21:31
Reported
2020-11-04 21:34
Platform
win10v20201028
Max time kernel
11s
Max time network
110s
Command Line
Signatures
Egregor Ransomware
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3272 wrote to memory of 1512 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 3272 wrote to memory of 1512 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 3272 wrote to memory of 1512 | 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\sm.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\sm.dll
Network
Files
memory/1512-0-0x0000000000000000-mapping.dmp
memory/1512-1-0x0000000000C80000-0x0000000000CBF000-memory.dmp
Analysis: behavioral3
Detonation Overview
Submitted
2020-11-04 21:31
Reported
2020-11-04 21:34
Platform
win7v20201028
Max time kernel
47s
Max time network
32s
Command Line
Signatures
Egregor Ransomware
Modifies extensions of user files
| Description | Indicator | Process | Target |
| File renamed | C:\Users\Admin\Pictures\EnterGroup.crw => C:\Users\Admin\Pictures\EnterGroup.crw.antani | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\RedoRead.tif => C:\Users\Admin\Pictures\RedoRead.tif.antani | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\RequestRegister.crw => C:\Users\Admin\Pictures\RequestRegister.crw.antani | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\StepComplete.tif => C:\Users\Admin\Pictures\StepComplete.tif.antani | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\UnpublishReceive.tif => C:\Users\Admin\Pictures\UnpublishReceive.tif.antani | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\AddRegister.crw => C:\Users\Admin\Pictures\AddRegister.crw.antani | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\JoinUse.raw => C:\Users\Admin\Pictures\JoinUse.raw.antani | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\ReceiveEnter.tiff | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ReceiveEnter.tiff => C:\Users\Admin\Pictures\ReceiveEnter.tiff.antani | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SetOut.crw => C:\Users\Admin\Pictures\SetOut.crw.antani | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SplitRegister.crw => C:\Users\Admin\Pictures\SplitRegister.crw.antani | C:\Windows\SysWOW64\rundll32.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e6189640.lnk | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RECOVER-FILES.txt | C:\Windows\SysWOW64\rundll32.exe | N/A |
Reads user/profile data of web browsers
Modifies service
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\COM+ REGDB Writer | C:\Windows\system32\vssvc.exe | N/A |
| Key created | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\ASR Writer | C:\Windows\system32\vssvc.exe | N/A |
| Key created | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Shadow Copy Optimization Writer | C:\Windows\system32\vssvc.exe | N/A |
| Key created | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer | C:\Windows\system32\vssvc.exe | N/A |
| Key created | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\SwProvider_{b5946137-7b9f-4925-af80-51abd60b20d5} | C:\Windows\system32\vssvc.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\Microsoft SQL Server Compact Edition\e6189640.lnk | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File created | C:\Program Files (x86)\Microsoft SQL Server Compact Edition\RECOVER-FILES.txt | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File created | C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\e6189640.lnk | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File created | C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\RECOVER-FILES.txt | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File created | C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\Desktop\e6189640.lnk | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File created | C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\Desktop\RECOVER-FILES.txt | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File created | C:\Program Files\RECOVER-FILES.txt | C:\Windows\SysWOW64\rundll32.exe | N/A |
| File created | C:\Program Files (x86)\RECOVER-FILES.txt | C:\Windows\SysWOW64\rundll32.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\RECOVER-FILES.txt | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: RenamesItself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeBackupPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeRestorePrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeAuditPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\spr3.bat"
C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\sm.dll",DllRegisterServer --passegregor10 --append="antani" --multiproc
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\sm.dll",DllRegisterServer --passegregor10 --append="antani" --multiproc
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\RECOVER-FILES.txt
Network
Files
memory/1552-0-0x0000000000000000-mapping.dmp
memory/1584-1-0x0000000000000000-mapping.dmp
memory/1584-2-0x0000000000220000-0x000000000025F000-memory.dmp
memory/1584-4-0x00000000008A0000-0x00000000008CA000-memory.dmp
C:\Users\Admin\Desktop\RECOVER-FILES.txt
| MD5 | 4451a81a5390d9a46e4eb5490b3d0489 |
| SHA1 | 3dec0a56d08da7feba75aa555fdf831ea189fd31 |
| SHA256 | eebf20ec05d09a8bedcd1013c20359e6daad8ea4b96c817775077ac2dbde1ed8 |
| SHA512 | 587fa974433fe91d7caedb5d2f6dc60be45948c860ae76ef718f8ee8e4f17521773ec7989f2ac8d617f8118c0436e91b675872cada1016264209fba8fc9b6926 |
memory/1320-7-0x000007FEF63F0000-0x000007FEF666A000-memory.dmp