Malware Analysis Report

2024-11-16 13:10

Sample ID 220621-3c2rjaefeq
Target 2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111
SHA256 2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111
Tags
limerat persistence rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111

Threat Level: Known bad

The file 2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111 was found to be: Known bad.

Malicious Activity Summary

limerat persistence rat

LimeRAT

Adds Run key to start application

Legitimate hosting services abused for malware hosting/C2

Suspicious use of SetThreadContext

Program crash

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-06-21 23:22

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-06-21 23:22

Reported

2022-06-21 23:25

Platform

win7-20220414-en

Max time kernel

150s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe"

Signatures

LimeRAT

rat limerat

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\Run\svch = "C:\\Users\\Admin\\svch.exe" C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe N/A

Legitimate hosting services abused for malware hosting/C2

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1224 set thread context of 952 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1224 wrote to memory of 952 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1224 wrote to memory of 952 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1224 wrote to memory of 952 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1224 wrote to memory of 952 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1224 wrote to memory of 952 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1224 wrote to memory of 952 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1224 wrote to memory of 952 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1224 wrote to memory of 952 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1224 wrote to memory of 952 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1224 wrote to memory of 952 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1224 wrote to memory of 952 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1224 wrote to memory of 1584 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\SysWOW64\WerFault.exe
PID 1224 wrote to memory of 1584 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\SysWOW64\WerFault.exe
PID 1224 wrote to memory of 1584 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\SysWOW64\WerFault.exe
PID 1224 wrote to memory of 1584 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe

"C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1224 -s 632

Network

Country Destination Domain Proto
US 8.8.8.8:53 pastebin.com udp
US 104.20.68.143:443 pastebin.com tcp

Files

memory/1224-54-0x0000000000B60000-0x0000000000BC8000-memory.dmp

memory/1224-55-0x0000000076531000-0x0000000076533000-memory.dmp

memory/1224-56-0x0000000000A60000-0x0000000000B4E000-memory.dmp

memory/1224-57-0x0000000000460000-0x0000000000468000-memory.dmp

memory/1224-58-0x00000000005D0000-0x0000000000602000-memory.dmp

memory/1224-59-0x0000000000470000-0x0000000000496000-memory.dmp

memory/952-60-0x0000000000400000-0x000000000040C000-memory.dmp

memory/952-61-0x0000000000400000-0x000000000040C000-memory.dmp

memory/952-63-0x0000000000400000-0x000000000040C000-memory.dmp

memory/952-64-0x0000000000400000-0x000000000040C000-memory.dmp

memory/952-65-0x0000000000408C1E-mapping.dmp

memory/952-67-0x0000000000400000-0x000000000040C000-memory.dmp

memory/952-69-0x0000000000400000-0x000000000040C000-memory.dmp

memory/1584-71-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-06-21 23:22

Reported

2022-06-21 23:26

Platform

win10v2004-20220414-en

Max time kernel

154s

Max time network

175s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe"

Signatures

LimeRAT

rat limerat

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svch = "C:\\Users\\Admin\\svch.exe" C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe N/A

Legitimate hosting services abused for malware hosting/C2

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2944 set thread context of 1356 N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe

"C:\Users\Admin\AppData\Local\Temp\2f31154a459e48c110a42c2cd1e13580d72569e93a1291c48160a8cdb6e44111.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2944 -ip 2944

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2944 -s 1088

Network

Country Destination Domain Proto
NL 104.97.14.81:80 tcp
IE 20.54.110.249:443 tcp
NL 104.110.191.133:80 tcp
US 52.168.117.170:443 tcp
US 8.8.8.8:53 pastebin.com udp
US 104.20.67.143:443 pastebin.com tcp
US 204.79.197.203:80 tcp

Files

memory/2944-131-0x0000000000EC0000-0x0000000000F28000-memory.dmp

memory/2944-132-0x0000000005A30000-0x0000000005ACC000-memory.dmp

memory/1356-134-0x0000000000400000-0x000000000040C000-memory.dmp

memory/1356-133-0x0000000000000000-mapping.dmp

memory/1356-135-0x0000000005130000-0x0000000005196000-memory.dmp

memory/1356-136-0x0000000005D70000-0x0000000006314000-memory.dmp

memory/1356-137-0x00000000063C0000-0x0000000006452000-memory.dmp