Malware Analysis Report

2025-06-16 00:30

Sample ID 240919-zrswdszhqm
Target c19fe3ac2961ae6b73b8e3592c5d27c553a83dd2be1107dc6b35df33891b9198N
SHA256 c19fe3ac2961ae6b73b8e3592c5d27c553a83dd2be1107dc6b35df33891b9198
Tags
discovery simda
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

c19fe3ac2961ae6b73b8e3592c5d27c553a83dd2be1107dc6b35df33891b9198

Threat Level: Known bad

The file c19fe3ac2961ae6b73b8e3592c5d27c553a83dd2be1107dc6b35df33891b9198N was found to be: Known bad.

Malicious Activity Summary

discovery simda

Simda family

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-19 20:57

Signatures

Simda family

simda

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-19 20:57

Reported

2024-09-19 20:59

Platform

win7-20240729-en

Max time kernel

91s

Max time network

17s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c19fe3ac2961ae6b73b8e3592c5d27c553a83dd2be1107dc6b35df33891b9198N.dll,#1

Signatures

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2216 wrote to memory of 2668 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2216 wrote to memory of 2668 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2216 wrote to memory of 2668 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2216 wrote to memory of 2668 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2216 wrote to memory of 2668 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2216 wrote to memory of 2668 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2216 wrote to memory of 2668 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c19fe3ac2961ae6b73b8e3592c5d27c553a83dd2be1107dc6b35df33891b9198N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c19fe3ac2961ae6b73b8e3592c5d27c553a83dd2be1107dc6b35df33891b9198N.dll,#1

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-19 20:57

Reported

2024-09-19 20:59

Platform

win10v2004-20240802-en

Max time kernel

94s

Max time network

95s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c19fe3ac2961ae6b73b8e3592c5d27c553a83dd2be1107dc6b35df33891b9198N.dll,#1

Signatures

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2944 wrote to memory of 3192 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2944 wrote to memory of 3192 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2944 wrote to memory of 3192 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c19fe3ac2961ae6b73b8e3592c5d27c553a83dd2be1107dc6b35df33891b9198N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\c19fe3ac2961ae6b73b8e3592c5d27c553a83dd2be1107dc6b35df33891b9198N.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

N/A