Malware Analysis Report

2024-10-16 03:25

Sample ID 201104-psr4ev2yke
Target 78.zip
SHA256 dcf6d7b8ae5c8513a6dc5b2580641770f5376ef2754c1cd1d91f80a3b66e01f9
Tags
egregor ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

dcf6d7b8ae5c8513a6dc5b2580641770f5376ef2754c1cd1d91f80a3b66e01f9

Threat Level: Known bad

The file 78.zip was found to be: Known bad.

Malicious Activity Summary

egregor ransomware

Egregor Ransomware

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2020-11-04 20:44

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2020-11-04 20:44

Reported

2020-11-04 20:46

Platform

win10v20201028

Max time kernel

13s

Max time network

111s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\sm.dll

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4632 wrote to memory of 4772 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4632 wrote to memory of 4772 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4632 wrote to memory of 4772 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

N/A

Files

memory/4772-0-0x0000000000000000-mapping.dmp

memory/4772-1-0x00000000030C0000-0x00000000030FF000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2020-11-04 20:44

Reported

2020-11-04 20:47

Platform

win7v20201028

Max time kernel

101s

Max time network

102s

Command Line

cmd /c "C:\Users\Admin\AppData\Local\Temp\spr3.bat"

Signatures

Egregor Ransomware

ransomware egregor

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 --append="antani" --multiproc

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe "C:\Users\Admin\AppData\Local\Temp\sm.dll",DllRegisterServer --append="antani" --multiproc

Network

N/A

Files

memory/1436-0-0x0000000000000000-mapping.dmp

memory/2028-1-0x0000000000000000-mapping.dmp

memory/2028-2-0x0000000000370000-0x00000000003AF000-memory.dmp

Analysis: behavioral4

Detonation Overview

Submitted

2020-11-04 20:44

Reported

2020-11-04 20:47

Platform

win10v20201028

Max time kernel

9s

Max time network

106s

Command Line

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\spr3.bat"

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1160 wrote to memory of 2712 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 1160 wrote to memory of 2712 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 2712 wrote to memory of 2708 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2712 wrote to memory of 2708 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2712 wrote to memory of 2708 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 --append="antani" --multiproc

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe "C:\Users\Admin\AppData\Local\Temp\sm.dll",DllRegisterServer --append="antani" --multiproc

Network

N/A

Files

memory/2712-0-0x0000000000000000-mapping.dmp

memory/2708-1-0x0000000000000000-mapping.dmp

memory/2708-2-0x00000000045B0000-0x00000000045EF000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2020-11-04 20:44

Reported

2020-11-04 20:46

Platform

win7v20201028

Max time kernel

150s

Max time network

152s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\sm.dll

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1848 wrote to memory of 1412 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1848 wrote to memory of 1412 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1848 wrote to memory of 1412 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1848 wrote to memory of 1412 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1848 wrote to memory of 1412 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1848 wrote to memory of 1412 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1848 wrote to memory of 1412 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

N/A

Files

memory/1412-0-0x0000000000000000-mapping.dmp

memory/1412-1-0x00000000007B0000-0x00000000007EF000-memory.dmp