Malware Analysis Report

2024-11-30 23:24

Sample ID 230912-sw5mesdg4w
Target wim32.dll
SHA256 33626834ce190f58584d566022ca50ff38f6b34d0231944ef0d27bd7ab7ae6b7
Tags
systembc
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

33626834ce190f58584d566022ca50ff38f6b34d0231944ef0d27bd7ab7ae6b7

Threat Level: Known bad

The file wim32.dll was found to be: Known bad.

Malicious Activity Summary

systembc

Systembc family

Blocklisted process makes network request

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-09-12 15:29

Signatures

Systembc family

systembc

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-12 15:29

Reported

2023-09-12 15:32

Platform

win7-20230831-en

Max time kernel

120s

Max time network

135s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\wim32.dll,#1

Signatures

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1976 wrote to memory of 1096 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1976 wrote to memory of 1096 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1976 wrote to memory of 1096 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1976 wrote to memory of 1096 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1976 wrote to memory of 1096 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1976 wrote to memory of 1096 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1976 wrote to memory of 1096 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\wim32.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\wim32.dll,#1

Network

Country Destination Domain Proto
US 45.61.136.241:4001 tcp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-09-12 15:29

Reported

2023-09-12 15:32

Platform

win10v2004-20230831-en

Max time kernel

32s

Max time network

138s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\wim32.dll,#1

Signatures

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4976 wrote to memory of 4220 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4976 wrote to memory of 4220 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4976 wrote to memory of 4220 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\wim32.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\wim32.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 45.61.136.241:4001 tcp
US 8.8.8.8:53 241.136.61.45.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 1.208.79.178.in-addr.arpa udp

Files

N/A