Malware Analysis Report

2024-10-16 03:26

Sample ID 201208-d2epydpcr2
Target e5c83994fb7a6ab58291ac93755d93a6.zip
SHA256 a209252f476c58e9facfb122bec872db6f971326fddada2a3d62153aff6b1206
Tags
egregor ransomware spyware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

a209252f476c58e9facfb122bec872db6f971326fddada2a3d62153aff6b1206

Threat Level: Known bad

The file e5c83994fb7a6ab58291ac93755d93a6.zip was found to be: Known bad.

Malicious Activity Summary

egregor ransomware spyware

Egregor Ransomware

Modifies extensions of user files

Drops startup file

Reads user/profile data of web browsers

Drops file in Windows directory

Drops file in Program Files directory

Suspicious behavior: RenamesItself

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2020-12-08 16:23

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2020-12-08 16:23

Reported

2020-12-08 16:33

Platform

win7v20201028

Max time kernel

241s

Max time network

240s

Command Line

cmd /c "C:\Users\Admin\AppData\Local\Temp\exec.bat"

Signatures

Egregor Ransomware

ransomware egregor

Modifies extensions of user files

ransomware
Description Indicator Process Target
File renamed C:\Users\Admin\Pictures\SetConvertFrom.raw => C:\Users\Admin\Pictures\SetConvertFrom.raw.HhPv C:\Windows\SysWOW64\rundll32.exe N/A
File renamed C:\Users\Admin\Pictures\UninstallReceive.raw => C:\Users\Admin\Pictures\UninstallReceive.raw.HhPv C:\Windows\SysWOW64\rundll32.exe N/A
File renamed C:\Users\Admin\Pictures\BackupInvoke.tiff => C:\Users\Admin\Pictures\BackupInvoke.tiff.lKxB C:\Windows\SysWOW64\rundll32.exe N/A
File renamed C:\Users\Admin\Pictures\CompressStop.tif => C:\Users\Admin\Pictures\CompressStop.tif.lKxB C:\Windows\SysWOW64\rundll32.exe N/A
File renamed C:\Users\Admin\Pictures\PushMount.crw => C:\Users\Admin\Pictures\PushMount.crw.rxeKAR C:\Windows\SysWOW64\rundll32.exe N/A
File opened for modification C:\Users\Admin\Pictures\RemoveStop.tiff C:\Windows\SysWOW64\rundll32.exe N/A
File renamed C:\Users\Admin\Pictures\RemoveStop.tiff => C:\Users\Admin\Pictures\RemoveStop.tiff.rxeKAR C:\Windows\SysWOW64\rundll32.exe N/A
File renamed C:\Users\Admin\Pictures\WaitFind.tif => C:\Users\Admin\Pictures\WaitFind.tif.HhPv C:\Windows\SysWOW64\rundll32.exe N/A
File renamed C:\Users\Admin\Pictures\AddUnlock.tif => C:\Users\Admin\Pictures\AddUnlock.tif.lKxB C:\Windows\SysWOW64\rundll32.exe N/A
File opened for modification C:\Users\Admin\Pictures\BackupInvoke.tiff 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

spyware

Drops file in Program Files directory

Description Indicator Process Target
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
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

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: 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

Processes

C:\Windows\system32\cmd.exe

cmd /c "C:\Users\Admin\AppData\Local\Temp\exec.bat"

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b.dll,DllRegisterServer --pass2police --full

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b.dll,DllRegisterServer --pass2police --full

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

N/A

Files

memory/1228-3-0x0000000000000000-mapping.dmp

memory/1100-2-0x0000000000000000-mapping.dmp

memory/1228-4-0x0000000000240000-0x000000000027F000-memory.dmp

memory/1228-6-0x0000000000370000-0x000000000039A000-memory.dmp