Malware Analysis Report

2024-10-16 03:26

Sample ID 211105-vr467scda6
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 17:14

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-11-05 17:14

Reported

2021-11-05 17:16

Platform

win7-en-20211104

Max time kernel

120s

Max time network

125s

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 1112 wrote to memory of 1872 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1112 wrote to memory of 1872 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1112 wrote to memory of 1872 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1112 wrote to memory of 1872 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1112 wrote to memory of 1872 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1112 wrote to memory of 1872 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1112 wrote to memory of 1872 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

N/A

Files

memory/1112-55-0x000007FEFC511000-0x000007FEFC513000-memory.dmp

memory/1872-56-0x0000000000000000-mapping.dmp

memory/1872-57-0x0000000075801000-0x0000000075803000-memory.dmp

memory/1872-60-0x0000000000330000-0x000000000036F000-memory.dmp

memory/1872-63-0x0000000000330000-0x00000000003B0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-11-05 17:14

Reported

2021-11-05 17:16

Platform

win10-en-20211104

Max time kernel

121s

Max time network

128s

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 4332 wrote to memory of 4036 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4332 wrote to memory of 4036 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4332 wrote to memory of 4036 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/4036-118-0x0000000000000000-mapping.dmp

memory/4036-119-0x0000000000060000-0x000000000009F000-memory.dmp