Malware Analysis Report

2025-04-03 09:43

Sample ID 230503-1qn2gsgg39
Target systembc_unpacked
SHA256 859ad779718a6f32b24f77fead92a93f447b72a0d2448680352e35803758038d
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

859ad779718a6f32b24f77fead92a93f447b72a0d2448680352e35803758038d

Threat Level: Known bad

The file systembc_unpacked 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

2023-05-03 21:51

Signatures

Systembc family

systembc

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-05-03 21:51

Reported

2023-05-03 21:54

Platform

win7-20230220-en

Max time kernel

30s

Max time network

137s

Command Line

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

Signatures

Blocklisted process makes network request

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

Processes

C:\Windows\system32\rundll32.exe

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

C:\Windows\SysWOW64\rundll32.exe

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

Network

Country Destination Domain Proto
US 45.77.115.67:443 tcp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-05-03 21:51

Reported

2023-05-03 21:54

Platform

win10v2004-20230221-en

Max time kernel

135s

Max time network

153s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\systembc_unpacked.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 1812 wrote to memory of 3992 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1812 wrote to memory of 3992 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1812 wrote to memory of 3992 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\systembc_unpacked.dll,#1

C:\Windows\SysWOW64\rundll32.exe

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

Network

Country Destination Domain Proto
US 209.197.3.8:80 tcp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 93.184.220.29:80 tcp
US 45.77.115.67:443 tcp
US 8.8.8.8:53 67.115.77.45.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 52.242.101.226:443 tcp
US 20.42.65.85:443 tcp
NL 173.223.113.164:443 tcp
US 52.242.101.226:443 tcp
US 8.8.8.8:53 86.8.109.52.in-addr.arpa udp
US 52.242.101.226:443 tcp
US 209.197.3.8:80 tcp
US 52.242.101.226:443 tcp
US 52.242.101.226:443 tcp
US 52.242.101.226:443 tcp

Files

N/A