Malware Analysis Report

2024-10-16 03:26

Sample ID 210726-g3fnc8jdw2
Target aee131ba1bfc4b6fa1961a7336e43d667086ebd2c7ff81029e14b2bf47d9f3a7.sample
SHA256 aee131ba1bfc4b6fa1961a7336e43d667086ebd2c7ff81029e14b2bf47d9f3a7
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 Overview

score
10/10

SHA256

aee131ba1bfc4b6fa1961a7336e43d667086ebd2c7ff81029e14b2bf47d9f3a7

Threat Level: Known bad

The file aee131ba1bfc4b6fa1961a7336e43d667086ebd2c7ff81029e14b2bf47d9f3a7.sample 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

2021-07-26 12:40

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-07-26 12:40

Reported

2021-07-26 12:48

Platform

win7v20210410

Max time kernel

3s

Max time network

40s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\aee131ba1bfc4b6fa1961a7336e43d667086ebd2c7ff81029e14b2bf47d9f3a7.sample.dll

Signatures

Egregor Ransomware

ransomware egregor

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\aee131ba1bfc4b6fa1961a7336e43d667086ebd2c7ff81029e14b2bf47d9f3a7.sample.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\aee131ba1bfc4b6fa1961a7336e43d667086ebd2c7ff81029e14b2bf47d9f3a7.sample.dll

Network

N/A

Files

memory/740-60-0x000007FEFB8F1000-0x000007FEFB8F3000-memory.dmp

memory/1816-61-0x0000000000000000-mapping.dmp

memory/1816-62-0x00000000757E1000-0x00000000757E3000-memory.dmp

memory/1816-64-0x0000000000220000-0x000000000025F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-07-26 12:40

Reported

2021-07-26 12:48

Platform

win10v20210410

Max time kernel

11s

Max time network

116s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\aee131ba1bfc4b6fa1961a7336e43d667086ebd2c7ff81029e14b2bf47d9f3a7.sample.dll

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3592 wrote to memory of 920 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3592 wrote to memory of 920 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3592 wrote to memory of 920 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\aee131ba1bfc4b6fa1961a7336e43d667086ebd2c7ff81029e14b2bf47d9f3a7.sample.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\aee131ba1bfc4b6fa1961a7336e43d667086ebd2c7ff81029e14b2bf47d9f3a7.sample.dll

Network

N/A

Files

memory/920-114-0x0000000000000000-mapping.dmp

memory/920-115-0x0000000003610000-0x000000000364F000-memory.dmp