Malware Analysis Report

2024-10-16 03:25

Sample ID 201005-fxp481p71j
Target b3.dll
SHA256 4c9e3ffda0e663217638e6192a093bbc23cd9ebfbdf6d2fc683f331beaee0321
Tags
ransomware egregor
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 Overview

score
10/10

SHA256

4c9e3ffda0e663217638e6192a093bbc23cd9ebfbdf6d2fc683f331beaee0321

Threat Level: Known bad

The file b3.dll was found to be: Known bad.

Malicious Activity Summary

ransomware egregor

Egregor Ransomware

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2020-10-05 13:32

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2020-10-05 13:32

Reported

2020-10-05 13:34

Platform

win7

Max time kernel

132s

Max time network

139s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b3.dll,#1

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1152 wrote to memory of 1816 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1152 wrote to memory of 1816 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1152 wrote to memory of 1816 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1152 wrote to memory of 1816 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1152 wrote to memory of 1816 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1152 wrote to memory of 1816 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1152 wrote to memory of 1816 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b3.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b3.dll,#1

Network

N/A

Files

memory/1816-0-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2020-10-05 13:32

Reported

2020-10-05 13:34

Platform

win10v200722

Max time kernel

11s

Max time network

112s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b3.dll,#1

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3816 wrote to memory of 2512 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3816 wrote to memory of 2512 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3816 wrote to memory of 2512 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b3.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b3.dll,#1

Network

N/A

Files

memory/2512-0-0x0000000000000000-mapping.dmp