Malware Analysis Report

2024-09-22 06:32

Sample ID 240615-11386azgql
Target 2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe
SHA256 2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4
Tags
stealc default discovery stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4

Threat Level: Known bad

The file 2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe was found to be: Known bad.

Malicious Activity Summary

stealc default discovery stealer

Stealc

Checks installed software on the system

Suspicious use of SetThreadContext

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Checks processor information in registry

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-15 22:07

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-15 22:07

Reported

2024-06-15 22:10

Platform

win7-20240611-en

Max time kernel

118s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe

"C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2188 -s 68

Network

N/A

Files

memory/2188-0-0x0000000000020000-0x0000000000021000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-15 22:07

Reported

2024-06-15 22:10

Platform

win10v2004-20240508-en

Max time kernel

143s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe"

Signatures

Stealc

stealer stealc

Checks installed software on the system

discovery

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4604 set thread context of 536 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4604 wrote to memory of 536 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 536 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 536 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 536 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 536 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 536 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 536 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 536 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 536 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe

"C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe"

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

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

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4080,i,5711962389779687290,1245653010537220991,262144 --variations-seed-version --mojo-platform-channel-handle=4208 /prefetch:8

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 536 -ip 536

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 536 -s 1348

Network

Country Destination Domain Proto
RU 94.228.166.55:80 tcp
NL 52.142.223.178:80 tcp
RU 94.228.166.55:80 tcp
RU 94.228.166.55:80 tcp
RU 94.228.166.55:80 tcp
RU 94.228.166.55:80 tcp
RU 94.228.166.55:80 tcp

Files

memory/4604-0-0x00000000009B0000-0x00000000009B1000-memory.dmp

memory/536-1-0x0000000000400000-0x000000000063C000-memory.dmp

memory/536-3-0x0000000000400000-0x000000000063C000-memory.dmp

memory/536-4-0x0000000000400000-0x000000000063C000-memory.dmp

memory/536-5-0x0000000000400000-0x000000000063C000-memory.dmp

memory/536-6-0x0000000000400000-0x000000000063C000-memory.dmp