Malware Analysis Report

2024-11-13 17:16

Sample ID 231122-sbzknsdg51
Target 13116607249.zip
SHA256 771bdbc3f8acd04f59cee274643d4f115aeca0575b070aaf67698dbd90d7a29a
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

771bdbc3f8acd04f59cee274643d4f115aeca0575b070aaf67698dbd90d7a29a

Threat Level: Known bad

The file 13116607249.zip was found to be: Known bad.

Malicious Activity Summary

systembc trojan

SystemBC

Blocklisted process makes network request

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-11-22 14:57

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-11-22 14:57

Reported

2023-11-22 15:00

Platform

win7-20231020-en

Max time kernel

141s

Max time network

136s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\95357abd84854c615bf87a93312ebdae6c9c5ea0f6e4103e537535b0f204c08b.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 1720 wrote to memory of 2940 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1720 wrote to memory of 2940 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1720 wrote to memory of 2940 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1720 wrote to memory of 2940 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1720 wrote to memory of 2940 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1720 wrote to memory of 2940 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1720 wrote to memory of 2940 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\95357abd84854c615bf87a93312ebdae6c9c5ea0f6e4103e537535b0f204c08b.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\95357abd84854c615bf87a93312ebdae6c9c5ea0f6e4103e537535b0f204c08b.dll,#1

Network

Country Destination Domain Proto
US 45.63.66.10:443 tcp

Files

memory/2940-0-0x00000000000B0000-0x00000000000E8000-memory.dmp

memory/2940-1-0x00000000001F0000-0x00000000001F6000-memory.dmp

memory/2940-2-0x0000000000210000-0x0000000000217000-memory.dmp

memory/2940-3-0x00000000000B0000-0x00000000000E8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-11-22 14:57

Reported

2023-11-22 15:00

Platform

win10v2004-20231023-en

Max time kernel

91s

Max time network

147s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\95357abd84854c615bf87a93312ebdae6c9c5ea0f6e4103e537535b0f204c08b.dll,#1

Signatures

SystemBC

trojan systembc

Program crash

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2424 wrote to memory of 1808 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2424 wrote to memory of 1808 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2424 wrote to memory of 1808 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\95357abd84854c615bf87a93312ebdae6c9c5ea0f6e4103e537535b0f204c08b.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\95357abd84854c615bf87a93312ebdae6c9c5ea0f6e4103e537535b0f204c08b.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1808 -ip 1808

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1808 -s 628

Network

Country Destination Domain Proto
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 192.240.110.104.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.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 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

memory/1808-0-0x00000000027F0000-0x00000000027F6000-memory.dmp

memory/1808-1-0x0000000002810000-0x0000000002817000-memory.dmp

memory/1808-2-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1808-3-0x00000000027F0000-0x00000000027F6000-memory.dmp