Malware Analysis Report

2025-06-15 21:58

Sample ID 221109-gd1pzaebe4
Target ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe
SHA256 ecf263506efdc83d3911e931d59dce6b9e9d6fe0c05695c040c57f724ef79efc
Tags
systembc evasion trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

ecf263506efdc83d3911e931d59dce6b9e9d6fe0c05695c040c57f724ef79efc

Threat Level: Known bad

The file ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe was found to be: Known bad.

Malicious Activity Summary

systembc evasion trojan

SystemBC

Identifies VirtualBox via ACPI registry values (likely anti-VM)

Identifies Wine through registry keys

Checks BIOS information in registry

Suspicious use of NtSetInformationThreadHideFromDebugger

Drops file in Windows directory

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-11-09 05:42

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-11-09 05:42

Reported

2022-11-09 05:45

Platform

win7-20220812-en

Max time kernel

79s

Max time network

114s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe"

Signatures

SystemBC

trojan systembc

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A

Identifies Wine through registry keys

evasion
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Tasks\wow64.job C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A
File opened for modification C:\Windows\Tasks\wow64.job C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe

"C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {E8CC419B-80D0-4D2C-BAF1-BEBF59834F7F} S-1-5-18:NT AUTHORITY\System:Service:

C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe

C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe start

Network

Country Destination Domain Proto
US 8.8.8.8:53 n20b28tu.info udp
LT 213.252.247.237:4248 n20b28tu.info tcp

Files

memory/1228-54-0x0000000000400000-0x0000000000894000-memory.dmp

memory/1228-55-0x0000000075561000-0x0000000075563000-memory.dmp

memory/1228-56-0x0000000077090000-0x0000000077210000-memory.dmp

memory/1228-57-0x0000000000400000-0x0000000000894000-memory.dmp

memory/1532-58-0x0000000000000000-mapping.dmp

memory/1532-59-0x0000000000400000-0x0000000000894000-memory.dmp

memory/1228-61-0x0000000077090000-0x0000000077210000-memory.dmp

memory/1532-62-0x0000000000400000-0x0000000000894000-memory.dmp

memory/1228-63-0x0000000077090000-0x0000000077210000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-11-09 05:42

Reported

2022-11-09 05:45

Platform

win10v2004-20220812-en

Max time kernel

100s

Max time network

159s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe"

Signatures

SystemBC

trojan systembc

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A

Identifies Wine through registry keys

evasion
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Tasks\wow64.job C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A
File created C:\Windows\Tasks\wow64.job C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe

"C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe"

C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe

C:\Users\Admin\AppData\Local\Temp\ECF263506EFDC83D3911E931D59DCE6B9E9D6FE0C0569.exe start

Network

Country Destination Domain Proto
NL 104.80.225.205:443 tcp
US 52.182.143.211:443 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 8.8.8.8:53 n20b28tu.info udp
LT 213.252.247.237:4248 n20b28tu.info tcp

Files

memory/4420-132-0x0000000000400000-0x0000000000894000-memory.dmp

memory/4420-133-0x0000000000400000-0x0000000000894000-memory.dmp

memory/4420-134-0x0000000077160000-0x0000000077303000-memory.dmp

memory/4420-135-0x0000000000400000-0x0000000000894000-memory.dmp

memory/4420-136-0x0000000077160000-0x0000000077303000-memory.dmp

memory/1836-137-0x0000000000400000-0x0000000000894000-memory.dmp

memory/1836-138-0x0000000077160000-0x0000000077303000-memory.dmp

memory/1836-139-0x0000000000400000-0x0000000000894000-memory.dmp

memory/1836-140-0x0000000077160000-0x0000000077303000-memory.dmp

memory/4420-141-0x0000000077160000-0x0000000077303000-memory.dmp