Malware Analysis Report

2025-04-03 09:43

Sample ID 230502-lbwqfsad38
Target a20d99e025fb23ba51d38a975bc10de5.exe
SHA256 6278b1a4d8a19c7ac40ee309c100924427fb35028f3eadb96112c9b70c3a0d59
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

6278b1a4d8a19c7ac40ee309c100924427fb35028f3eadb96112c9b70c3a0d59

Threat Level: Known bad

The file a20d99e025fb23ba51d38a975bc10de5.exe was found to be: Known bad.

Malicious Activity Summary

systembc trojan

SystemBC

Executes dropped EXE

Drops file in Windows directory

Program crash

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-05-02 09:22

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-05-02 09:22

Reported

2023-05-02 09:24

Platform

win7-20230220-en

Max time kernel

147s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe"

Signatures

SystemBC

trojan systembc

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\gsfobsl\viojprg.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Tasks\viojprg.job C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A
File opened for modification C:\Windows\Tasks\viojprg.job C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 564 wrote to memory of 1448 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\gsfobsl\viojprg.exe
PID 564 wrote to memory of 1448 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\gsfobsl\viojprg.exe
PID 564 wrote to memory of 1448 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\gsfobsl\viojprg.exe
PID 564 wrote to memory of 1448 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\gsfobsl\viojprg.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe

"C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {5F5BBE9C-4577-4327-A7AC-A716EB314FC7} S-1-5-18:NT AUTHORITY\System:Service:

C:\ProgramData\gsfobsl\viojprg.exe

C:\ProgramData\gsfobsl\viojprg.exe start

Network

Country Destination Domain Proto
PA 141.98.82.229:4001 tcp
PA 141.98.82.229:4001 tcp
PA 141.98.82.229:4001 tcp

Files

memory/1988-55-0x00000000001B0000-0x00000000001B9000-memory.dmp

memory/1988-56-0x0000000000400000-0x0000000000581000-memory.dmp

C:\ProgramData\gsfobsl\viojprg.exe

MD5 a20d99e025fb23ba51d38a975bc10de5
SHA1 6d58a7dc6f4e84ed6cf70fb154e6af3193ff4045
SHA256 6278b1a4d8a19c7ac40ee309c100924427fb35028f3eadb96112c9b70c3a0d59
SHA512 a99ea0bc3d947e5048d92f8e5bdf1745c5d428f2934e29cb2d4f7d3bea029a467e01f28fdc5f09390141b80ad80e016b5b9171fb3b4bf2bd0e0a84a6d9328198

C:\ProgramData\gsfobsl\viojprg.exe

MD5 a20d99e025fb23ba51d38a975bc10de5
SHA1 6d58a7dc6f4e84ed6cf70fb154e6af3193ff4045
SHA256 6278b1a4d8a19c7ac40ee309c100924427fb35028f3eadb96112c9b70c3a0d59
SHA512 a99ea0bc3d947e5048d92f8e5bdf1745c5d428f2934e29cb2d4f7d3bea029a467e01f28fdc5f09390141b80ad80e016b5b9171fb3b4bf2bd0e0a84a6d9328198

memory/1448-70-0x0000000000400000-0x0000000000581000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-05-02 09:22

Reported

2023-05-02 09:24

Platform

win10v2004-20230220-en

Max time kernel

145s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe"

Signatures

SystemBC

trojan systembc

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\dvgwh\mumxk.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Tasks\mumxk.job C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A
File opened for modification C:\Windows\Tasks\mumxk.job C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe

"C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 384 -p 1696 -ip 1696

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1696 -s 956

C:\ProgramData\dvgwh\mumxk.exe

C:\ProgramData\dvgwh\mumxk.exe start

Network

Country Destination Domain Proto
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 93.184.220.29:80 tcp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 40.125.122.176:443 tcp
US 13.89.179.9:443 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 40.125.122.176:443 tcp
US 8.8.8.8:53 64.13.109.52.in-addr.arpa udp
US 93.184.221.240:80 tcp
US 40.125.122.176:443 tcp
US 40.125.122.176:443 tcp
US 40.125.122.176:443 tcp
PA 141.98.82.229:4001 tcp
US 40.125.122.176:443 tcp
PA 141.98.82.229:4001 tcp
PA 141.98.82.229:4001 tcp

Files

memory/1696-134-0x0000000000720000-0x0000000000729000-memory.dmp

memory/1696-135-0x0000000000400000-0x0000000000581000-memory.dmp

C:\ProgramData\dvgwh\mumxk.exe

MD5 a20d99e025fb23ba51d38a975bc10de5
SHA1 6d58a7dc6f4e84ed6cf70fb154e6af3193ff4045
SHA256 6278b1a4d8a19c7ac40ee309c100924427fb35028f3eadb96112c9b70c3a0d59
SHA512 a99ea0bc3d947e5048d92f8e5bdf1745c5d428f2934e29cb2d4f7d3bea029a467e01f28fdc5f09390141b80ad80e016b5b9171fb3b4bf2bd0e0a84a6d9328198

C:\ProgramData\dvgwh\mumxk.exe

MD5 a20d99e025fb23ba51d38a975bc10de5
SHA1 6d58a7dc6f4e84ed6cf70fb154e6af3193ff4045
SHA256 6278b1a4d8a19c7ac40ee309c100924427fb35028f3eadb96112c9b70c3a0d59
SHA512 a99ea0bc3d947e5048d92f8e5bdf1745c5d428f2934e29cb2d4f7d3bea029a467e01f28fdc5f09390141b80ad80e016b5b9171fb3b4bf2bd0e0a84a6d9328198

memory/5092-149-0x0000000000400000-0x0000000000581000-memory.dmp