Malware Analysis Report

2025-04-03 09:18

Sample ID 250306-fzdlwszpx8
Target dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe
SHA256 dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d
Tags
systembc defense_evasion discovery trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d

Threat Level: Known bad

The file dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe was found to be: Known bad.

Malicious Activity Summary

systembc defense_evasion discovery trojan

Systembc family

SystemBC

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

Checks BIOS information in registry

Identifies Wine through registry keys

Executes dropped EXE

Suspicious use of NtSetInformationThreadHideFromDebugger

Drops file in Windows directory

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-03-06 05:18

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2025-03-06 05:18

Reported

2025-03-06 05:20

Platform

win7-20241010-en

Max time kernel

149s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe"

Signatures

SystemBC

trojan systembc

Systembc family

systembc

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

defense_evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\ProgramData\tcxxvqj\kjstat.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\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\ProgramData\tcxxvqj\kjstat.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\ProgramData\tcxxvqj\kjstat.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\tcxxvqj\kjstat.exe N/A

Identifies Wine through registry keys

defense_evasion
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Wine C:\ProgramData\tcxxvqj\kjstat.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A
N/A N/A C:\ProgramData\tcxxvqj\kjstat.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Tasks\Test Task17.job C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\ProgramData\tcxxvqj\kjstat.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A
N/A N/A C:\ProgramData\tcxxvqj\kjstat.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2804 wrote to memory of 2776 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\tcxxvqj\kjstat.exe
PID 2804 wrote to memory of 2776 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\tcxxvqj\kjstat.exe
PID 2804 wrote to memory of 2776 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\tcxxvqj\kjstat.exe
PID 2804 wrote to memory of 2776 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\tcxxvqj\kjstat.exe

Processes

C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe

"C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {3252C5A8-BA62-40AF-8740-3B585F0A9DB9} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]

C:\ProgramData\tcxxvqj\kjstat.exe

C:\ProgramData\tcxxvqj\kjstat.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 towerbingobongoboom.com udp
US 213.209.150.137:4000 towerbingobongoboom.com tcp
US 213.209.150.137:4151 towerbingobongoboom.com tcp

Files

memory/2424-0-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2424-1-0x0000000077D00000-0x0000000077D02000-memory.dmp

memory/2424-2-0x0000000000401000-0x0000000000403000-memory.dmp

memory/2424-4-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2424-6-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2424-7-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2424-8-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2424-9-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2424-10-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-13-0x0000000000400000-0x0000000000823000-memory.dmp

C:\ProgramData\tcxxvqj\kjstat.exe

MD5 8c767708c9a9554c0afb504629e75ffd
SHA1 c65394806c0f77af880c7ff8a021bd4222ca3f11
SHA256 dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d
SHA512 f9531159b45f92db319f351ebf4dadf9ba3c413e87da401a0af81d25a446084ed30dee670462292b989e1c9b0074a3c2ae76bb8a1d992e4407f72360303b4e16

memory/2776-14-0x0000000000400000-0x0000000000823000-memory.dmp

C:\Windows\Tasks\Test Task17.job

MD5 41e66c7c88792b68af7670063d97436e
SHA1 1088dad224442d8dddd0170a1de359197f54a568
SHA256 1127aea171baac4b10dcb84b90180d32011bf931e97290d62a3ee871cc0c8925
SHA512 ce1ee61f00be117e82594a63cfd4ad1d6ed3a03aeac0e1551a9568715d5088ca45778d5b30eedba73e745f8a55ed0d9980a9ab2c368702cb927cc12d4365403b

memory/2776-16-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2424-17-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-18-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-19-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-20-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-21-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2424-22-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-23-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2424-24-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2424-25-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-26-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-27-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-28-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-29-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-30-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-31-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-32-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-33-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-34-0x0000000000400000-0x0000000000823000-memory.dmp

memory/2776-35-0x0000000000400000-0x0000000000823000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-03-06 05:18

Reported

2025-03-06 05:20

Platform

win10v2004-20250217-en

Max time kernel

145s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe"

Signatures

SystemBC

trojan systembc

Systembc family

systembc

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

defense_evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\ProgramData\ptbio\rlge.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\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\ProgramData\ptbio\rlge.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\ProgramData\ptbio\rlge.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\ptbio\rlge.exe N/A

Identifies Wine through registry keys

defense_evasion
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-1161330783-2912525651-1278508834-1000\Software\Wine C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-1161330783-2912525651-1278508834-1000\Software\Wine C:\ProgramData\ptbio\rlge.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A
N/A N/A C:\ProgramData\ptbio\rlge.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Tasks\Test Task17.job C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\ProgramData\ptbio\rlge.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe

"C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe"

C:\ProgramData\ptbio\rlge.exe

C:\ProgramData\ptbio\rlge.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 towerbingobongoboom.com udp
US 213.209.150.137:4000 towerbingobongoboom.com tcp
US 213.209.150.137:4361 towerbingobongoboom.com tcp

Files

memory/4924-0-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4924-1-0x0000000077264000-0x0000000077266000-memory.dmp

memory/4924-2-0x0000000000401000-0x0000000000403000-memory.dmp

memory/4924-3-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4924-6-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4924-7-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4924-8-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4924-9-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4924-10-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4924-11-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4924-12-0x0000000000400000-0x0000000000823000-memory.dmp

C:\ProgramData\ptbio\rlge.exe

MD5 8c767708c9a9554c0afb504629e75ffd
SHA1 c65394806c0f77af880c7ff8a021bd4222ca3f11
SHA256 dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d
SHA512 f9531159b45f92db319f351ebf4dadf9ba3c413e87da401a0af81d25a446084ed30dee670462292b989e1c9b0074a3c2ae76bb8a1d992e4407f72360303b4e16

memory/4448-15-0x0000000000400000-0x0000000000823000-memory.dmp

C:\Windows\Tasks\Test Task17.job

MD5 93df97b842844b855e1c147825f7d38d
SHA1 057a6d8b9637914f94d88a5efcf3f2cd14cd8e22
SHA256 75ba40d20879a9b233a9b9ba34f108609f78522e402932db1466d8dc31ef3c5e
SHA512 e0d6918aac6e2a5e4254dc849d5a8086c7ff90d2d8671ba72b5093edabbfd009e803d1a6228771be28aff16fe9caa50885cff32c60d20ace79269113b0d8a1f2

memory/4448-17-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4924-18-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4448-19-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4448-20-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4448-21-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4924-22-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4924-23-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4448-24-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4448-25-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4448-26-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4448-27-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4448-28-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4448-29-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4448-30-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4448-31-0x0000000000400000-0x0000000000823000-memory.dmp

memory/4448-32-0x0000000000400000-0x0000000000823000-memory.dmp