Malware Analysis Report

2024-10-16 03:26

Sample ID 201005-by9nkhqy8s
Target b.dll
SHA256 aee131ba1bfc4b6fa1961a7336e43d667086ebd2c7ff81029e14b2bf47d9f3a7
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

aee131ba1bfc4b6fa1961a7336e43d667086ebd2c7ff81029e14b2bf47d9f3a7

Threat Level: Known bad

The file b.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 12:14

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2020-10-05 12:14

Reported

2020-10-05 12:18

Platform

win7

Max time kernel

132s

Max time network

138s

Command Line

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

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1500 wrote to memory of 1692 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1500 wrote to memory of 1692 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1500 wrote to memory of 1692 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1500 wrote to memory of 1692 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1500 wrote to memory of 1692 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1500 wrote to memory of 1692 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1500 wrote to memory of 1692 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\b.dll,#1

C:\Windows\SysWOW64\rundll32.exe

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

Network

N/A

Files

memory/1692-0-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2020-10-05 12:14

Reported

2020-10-05 12:18

Platform

win10v200722

Max time kernel

13s

Max time network

113s

Command Line

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

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 412 wrote to memory of 1176 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 412 wrote to memory of 1176 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 412 wrote to memory of 1176 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\b.dll,#1

C:\Windows\SysWOW64\rundll32.exe

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

Network

N/A

Files

memory/1176-0-0x0000000000000000-mapping.dmp