Malware Analysis Report

2024-10-16 03:26

Sample ID 201209-c6wp4hg47e
Target b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6

Threat Level: Known bad

The file b9b71eb04d255b21e3272eef5f4c15d1c208183748dfad3569efd455d87879c6 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

2020-12-09 18:28

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2020-12-09 18:28

Reported

2020-12-09 18:31

Platform

win7v20201028

Max time kernel

3s

Max time network

11s

Command Line

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

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1204 wrote to memory of 2016 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1204 wrote to memory of 2016 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1204 wrote to memory of 2016 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1204 wrote to memory of 2016 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1204 wrote to memory of 2016 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1204 wrote to memory of 2016 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1204 wrote to memory of 2016 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.dll

C:\Windows\SysWOW64\regsvr32.exe

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

Network

N/A

Files

memory/2016-2-0x0000000000000000-mapping.dmp

memory/2016-3-0x0000000000380000-0x00000000003BF000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2020-12-09 18:28

Reported

2020-12-09 18:31

Platform

win10v20201028

Max time kernel

15s

Max time network

112s

Command Line

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

Signatures

Egregor Ransomware

ransomware egregor

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 816 wrote to memory of 1940 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 816 wrote to memory of 1940 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 816 wrote to memory of 1940 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.dll

C:\Windows\SysWOW64\regsvr32.exe

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

Network

N/A

Files

memory/1940-2-0x0000000000000000-mapping.dmp

memory/1940-3-0x0000000000CB0000-0x0000000000CEF000-memory.dmp