systembc | 1edc123e5a8ea5ce814e2759ee38453404d4af72a3577b0af55e8d99fa38ef1c

Analysis

max time kernel
145s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
02/03/2025, 12:18

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General

Target
73636685f823d103c54b30bc457c7f0d.exe
Size 457KB
Sample250302-pg3mqsvlw5
SHA256 1edc123e5a8ea5ce814e2759ee38453404d4af72a3577b0af55e8d99fa38ef1c
MD5 73636685f823d103c54b30bc457c7f0d
SHA1 597dba03dce00cf6d30b082c80c8f9108ae90ccf
SHA512 183d4901a72afc044ef13c3a2cc21f93aefd954665f981c7886afc9019ca7d46f76b3459789dff5721542f2f9e7bbf606d7df68328e772e4c66dc789964f43f7
SSDEEP 6144:P2ib1rFTRH6sf1kroyfIWjpTX335ilMSp01Hj6fGMWPsEY15sFBc9TT6N7AOs+OK:+ib1rFTRH6serb/p93j6fGMWP1N72h
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

systembc defense_evasion discovery trojan

Malware Config

Extracted

Family

systembc

towerbingobongoboom.com
213.209.150.137

Attributes

dns
5.132.191.104

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Systembc family
systembc

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	rundrive.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	fvgabvv.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
6	2988	Gxtuum.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	rundrive.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	rundrive.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	fvgabvv.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	fvgabvv.exe

Executes dropped EXE 3 IoCs

pid	Process
2988	Gxtuum.exe
2812	rundrive.exe
2388	fvgabvv.exe

Identifies Wine through registry keys 2 TTPs 2 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Wine	rundrive.exe
Key opened	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Wine	fvgabvv.exe

Loads dropped DLL 3 IoCs

pid	Process
2260	73636685f823d103c54b30bc457c7f0d.exe
2988	Gxtuum.exe
2988	Gxtuum.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2812	rundrive.exe
2388	fvgabvv.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\Gxtuum.job	73636685f823d103c54b30bc457c7f0d.exe
File created	C:\Windows\Tasks\Test Task17.job	rundrive.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundrive.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fvgabvv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	73636685f823d103c54b30bc457c7f0d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Gxtuum.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2812	rundrive.exe
2388	fvgabvv.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2260	73636685f823d103c54b30bc457c7f0d.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2260 wrote to memory of 2988	2260	73636685f823d103c54b30bc457c7f0d.exe	30
PID 2260 wrote to memory of 2988	2260	73636685f823d103c54b30bc457c7f0d.exe	30
PID 2260 wrote to memory of 2988	2260	73636685f823d103c54b30bc457c7f0d.exe	30
PID 2260 wrote to memory of 2988	2260	73636685f823d103c54b30bc457c7f0d.exe	30
PID 2988 wrote to memory of 2812	2988	Gxtuum.exe	33
PID 2988 wrote to memory of 2812	2988	Gxtuum.exe	33
PID 2988 wrote to memory of 2812	2988	Gxtuum.exe	33
PID 2988 wrote to memory of 2812	2988	Gxtuum.exe	33
PID 2384 wrote to memory of 2388	2384	taskeng.exe	35
PID 2384 wrote to memory of 2388	2384	taskeng.exe	35
PID 2384 wrote to memory of 2388	2384	taskeng.exe	35
PID 2384 wrote to memory of 2388	2384	taskeng.exe	35

C:\Users\Admin\AppData\Local\Temp\73636685f823d103c54b30bc457c7f0d.exe
"C:\Users\Admin\AppData\Local\Temp\73636685f823d103c54b30bc457c7f0d.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:2260
- C:\Users\Admin\AppData\Local\Temp\a58456755d\Gxtuum.exe
  "C:\Users\Admin\AppData\Local\Temp\a58456755d\Gxtuum.exe"
  2⤵
  - Downloads MZ/PE file
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2988
- - C:\Users\Admin\AppData\Roaming\10000550100\rundrive.exe
    "C:\Users\Admin\AppData\Roaming\10000550100\rundrive.exe"
    3⤵
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Identifies Wine through registry keys
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2812

C:\Windows\system32\taskeng.exe
taskeng.exe {B50D77EF-D78F-4E31-868C-08A0AC66C5B8} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2384
- C:\ProgramData\lvpde\fvgabvv.exe
  C:\ProgramData\lvpde\fvgabvv.exe
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Identifies Wine through registry keys
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2388

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Gxtuum.exe

Path C:\Users\Admin\AppData\Local\Temp\a58456755d\Gxtuum.exe
Size 457KB
SHA256 1edc123e5a8ea5ce814e2759ee38453404d4af72a3577b0af55e8d99fa38ef1c
MD5 73636685f823d103c54b30bc457c7f0d
SHA1 597dba03dce00cf6d30b082c80c8f9108ae90ccf
SHA512 183d4901a72afc044ef13c3a2cc21f93aefd954665f981c7886afc9019ca7d46f76b3459789dff5721542f2f9e7bbf606d7df68328e772e4c66dc789964f43f7
SSDEEP 6144:P2ib1rFTRH6sf1kroyfIWjpTX335ilMSp01Hj6fGMWPsEY15sFBc9TT6N7AOs+OK:+ib1rFTRH6serb/p93j6fGMWP1N72h
MD5 SHA1 SHA512 SSDEEP

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rundrive.exe

Path C:\Users\Admin\AppData\Roaming\10000550100\rundrive.exe
Size 1.7MB
SHA256 833610e95cc965e70096620e0adaa8917963df9f9ec56e00af1ff331161a7971
MD5 9218e5cad03c752f237ed87a9e52def4
SHA1 0ccddab0d87776d78c613c6e7a6f3bce93ffc3d3
SHA512 4ca94c23bf82bee5ff5a7f7e318e99c084f7403cdc2e23276087f55620f9e9f988a7a6816fedcd2f853a21fe645c3cc89f7b2f6f05f792b549fd698fd14f5cb3
SSDEEP 49152:NWiPyNzLHax6WxKPQx1GyGe4/xU7VNT1xMJ1NxjnW8EtVO:NhGW4OOCbhGQK
MD5 SHA1 SHA512 SSDEEP

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Test Task17.job

Path C:\Windows\Tasks\Test Task17.job
Size 220B
SHA256 e2847adf2647e771a2649dfb0871210440130607594a415401612c327c8a5c55
MD5 ea4e49061e46ff1f883a5a0057f6d158
SHA1 4b42aab80bcfacfc6619ce6659b202509dfaba6a
SHA512 d776bc43106db21db1114582f4d9819d4fc9d01c1e919b159ec9494298363a0a1f28ef43aea079340e0685b3bf14800cc68acc7272147a67d03bca8bf1da0b85
MD5 SHA1 SHA512

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memory/2260-1-0x0000000000540000-0x0000000000541000-memory.dmp

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memory/2388-53-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2388-54-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2388-44-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2388-55-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2388-52-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2388-51-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2388-50-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2388-49-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2388-48-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2388-56-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2812-32-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2812-37-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2812-40-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2812-39-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2812-46-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2812-47-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2812-38-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2812-41-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2812-36-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2812-35-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2812-27-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2812-29-0x0000000000400000-0x0000000000856000-memory.dmp

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memory/2988-34-0x0000000004320000-0x0000000004776000-memory.dmp

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memory/2988-28-0x0000000004320000-0x0000000004776000-memory.dmp

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memory/2988-26-0x0000000004320000-0x0000000004776000-memory.dmp

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