Malware Analysis Report

2024-10-16 03:25

Sample ID 201104-phbkv85mh6
Target t10.zip
SHA256 c497ed1d0a24ab346937b45b5ba1110eb0983251155e22fd13796be224d452ed
Tags
egregor ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

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 Overview

score
10/10

SHA256

c497ed1d0a24ab346937b45b5ba1110eb0983251155e22fd13796be224d452ed

Threat Level: Known bad

The file t10.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 21:30

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2020-11-04 21:30

Reported

2020-11-04 21:32

Platform

win7v20201028

Max time kernel

3s

Max time network

9s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\b2.dll

Signatures

Egregor Ransomware

ransomware egregor

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\b2.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\b2.dll

Network

N/A

Files

memory/1896-0-0x0000000000000000-mapping.dmp

memory/1896-1-0x0000000000170000-0x00000000001AF000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2020-11-04 21:30

Reported

2020-11-04 21:32

Platform

win10v20201028

Max time kernel

12s

Max time network

110s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\b2.dll

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1056 wrote to memory of 4000 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1056 wrote to memory of 4000 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1056 wrote to memory of 4000 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\b2.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\b2.dll

Network

N/A

Files

memory/4000-0-0x0000000000000000-mapping.dmp

memory/4000-1-0x0000000002AB0000-0x0000000002AEF000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2020-11-04 21:30

Reported

2020-11-04 21:32

Platform

win7v20201028

Max time kernel

2s

Max time network

8s

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\b2.dll",DllRegisterServer --Password10Char --append="antani" --multiproc

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe "C:\Users\Admin\AppData\Local\Temp\b2.dll",DllRegisterServer --Password10Char --append="antani" --multiproc

Network

N/A

Files

memory/1344-0-0x0000000000000000-mapping.dmp

memory/1236-1-0x0000000000000000-mapping.dmp

memory/1236-2-0x0000000000330000-0x000000000036F000-memory.dmp

Analysis: behavioral4

Detonation Overview

Submitted

2020-11-04 21:30

Reported

2020-11-04 21:32

Platform

win10v20201028

Max time kernel

79s

Max time network

80s

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 640 wrote to memory of 2156 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 640 wrote to memory of 2156 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 2156 wrote to memory of 2548 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2156 wrote to memory of 2548 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2156 wrote to memory of 2548 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\b2.dll",DllRegisterServer --Password10Char --append="antani" --multiproc

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe "C:\Users\Admin\AppData\Local\Temp\b2.dll",DllRegisterServer --Password10Char --append="antani" --multiproc

Network

N/A

Files

memory/2156-0-0x0000000000000000-mapping.dmp

memory/2548-1-0x0000000000000000-mapping.dmp

memory/2548-2-0x00000000033F0000-0x000000000342F000-memory.dmp