Malware Analysis Report

2024-10-16 03:26

Sample ID 211105-vmnnnahefk
Target 3fd510a3
SHA256 3fd510a3b2e0b0802d57cd5b1cac1e61797d50a08b87d9b5243becd9e2f7073f
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

3fd510a3b2e0b0802d57cd5b1cac1e61797d50a08b87d9b5243becd9e2f7073f

Threat Level: Known bad

The file 3fd510a3 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

2021-11-05 17:06

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-11-05 17:06

Reported

2021-11-05 17:09

Platform

win7-en-20211014

Max time kernel

122s

Max time network

124s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\3fd510a3.dll

Signatures

Egregor Ransomware

ransomware egregor

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\3fd510a3.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\3fd510a3.dll

Network

N/A

Files

memory/1868-55-0x000007FEFB9C1000-0x000007FEFB9C3000-memory.dmp

memory/772-56-0x0000000000000000-mapping.dmp

memory/772-57-0x0000000075B71000-0x0000000075B73000-memory.dmp

memory/772-58-0x00000000001B0000-0x00000000001EF000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-11-05 17:06

Reported

2021-11-05 17:09

Platform

win10-en-20211104

Max time kernel

122s

Max time network

122s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\3fd510a3.dll

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4048 wrote to memory of 1900 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4048 wrote to memory of 1900 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4048 wrote to memory of 1900 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\3fd510a3.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\3fd510a3.dll

Network

Country Destination Domain Proto
US 52.109.8.20:443 tcp
US 8.8.8.8:53 time.windows.com udp
NL 40.119.148.38:123 time.windows.com udp

Files

memory/1900-118-0x0000000000000000-mapping.dmp

memory/1900-119-0x0000000003EF0000-0x0000000003F2F000-memory.dmp