Malware Analysis Report

2024-10-16 03:26

Sample ID 211020-l6fygsghc5
Target b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6.sample
SHA256 b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6
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 Overview

score
10/10

SHA256

b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6

Threat Level: Known bad

The file b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6.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

2021-10-20 10:08

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-10-20 10:08

Reported

2021-10-20 10:13

Platform

win10-en-20210920

Max time kernel

239s

Max time network

124s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6.sample.dll

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3464 wrote to memory of 3212 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3464 wrote to memory of 3212 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3464 wrote to memory of 3212 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\b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6.sample.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6.sample.dll

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

Network

Country Destination Domain Proto
US 8.8.8.8:53 time.windows.com udp
NL 20.101.57.9:123 time.windows.com udp

Files

memory/3212-115-0x0000000000000000-mapping.dmp

memory/3212-116-0x0000000001120000-0x000000000115F000-memory.dmp