Malware Analysis Report

2024-11-13 17:16

Sample ID 231205-vcbaksdb22
Target 4dae3b84eeb5e36c144f9fad2f2b06d9e82381cda6b1f043033cf3644f339558
SHA256 4dae3b84eeb5e36c144f9fad2f2b06d9e82381cda6b1f043033cf3644f339558
Tags
systembc trojan
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

4dae3b84eeb5e36c144f9fad2f2b06d9e82381cda6b1f043033cf3644f339558

Threat Level: Known bad

The file 4dae3b84eeb5e36c144f9fad2f2b06d9e82381cda6b1f043033cf3644f339558 was found to be: Known bad.

Malicious Activity Summary

systembc trojan

SystemBC

Blocklisted process makes network request

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-05 16:50

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-05 16:50

Reported

2023-12-05 16:52

Platform

win7-20231020-en

Max time kernel

117s

Max time network

138s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4dae3b84eeb5e36c144f9fad2f2b06d9e82381cda6b1f043033cf3644f339558.dll,#1

Signatures

SystemBC

trojan systembc

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 2216 wrote to memory of 2552 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2216 wrote to memory of 2552 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2216 wrote to memory of 2552 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2216 wrote to memory of 2552 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2216 wrote to memory of 2552 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2216 wrote to memory of 2552 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2216 wrote to memory of 2552 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\4dae3b84eeb5e36c144f9fad2f2b06d9e82381cda6b1f043033cf3644f339558.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4dae3b84eeb5e36c144f9fad2f2b06d9e82381cda6b1f043033cf3644f339558.dll,#1

Network

Country Destination Domain Proto
RU 62.173.140.37:4001 tcp

Files

memory/2552-1-0x00000000001B0000-0x00000000001B7000-memory.dmp

memory/2552-0-0x0000000000A00000-0x0000000000B09000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-05 16:50

Reported

2023-12-05 16:53

Platform

win10v2004-20231127-en

Max time kernel

142s

Max time network

161s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4dae3b84eeb5e36c144f9fad2f2b06d9e82381cda6b1f043033cf3644f339558.dll,#1

Signatures

SystemBC

trojan systembc

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 2992 wrote to memory of 3520 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2992 wrote to memory of 3520 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2992 wrote to memory of 3520 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\4dae3b84eeb5e36c144f9fad2f2b06d9e82381cda6b1f043033cf3644f339558.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4dae3b84eeb5e36c144f9fad2f2b06d9e82381cda6b1f043033cf3644f339558.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 169.255.221.88.in-addr.arpa udp
US 8.8.8.8:53 155.245.36.23.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
N/A 40.127.169.103:443 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
N/A 52.165.164.15:443 tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 udp
N/A 40.127.169.103:443 tcp
N/A 40.127.169.103:443 tcp
US 8.8.8.8:53 udp
N/A 23.217.99.146:80 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
RU 62.173.140.37:4001 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
N/A 20.223.35.26:443 tcp
N/A 20.223.35.26:443 tcp
N/A 20.223.35.26:443 tcp
US 8.8.8.8:53 136.71.105.51.in-addr.arpa udp

Files

memory/3520-0-0x0000000002E80000-0x0000000002F89000-memory.dmp

memory/3520-1-0x0000000002D30000-0x0000000002D37000-memory.dmp