systembc | b1663d4497ddd27a59f090b72adcedddac51724a1c126f7d6469f8045d065e15

General

Target

a9749ee52eefb0fd48a66527095354bb.exe
Size

452KB
MD5

a9749ee52eefb0fd48a66527095354bb
SHA1

78170bcc54e1f774528dea3118b50ffc46064fe0
SHA256

b1663d4497ddd27a59f090b72adcedddac51724a1c126f7d6469f8045d065e15
SHA512

9d21f0e1e376b89df717403a3939ed86ef61095bb9f0167ff15c01d3bbbee03d4dd01b3e2769ecd921e40e43bab3cbf0a6844ab6f296982227b0cb507b4b0e25
SSDEEP

12288:Rib1rFTRH6serb/p93j6fGMWP1N72h8xp:IH659m+Mk1YW

Score

10^/10

systembc defense_evasion discovery trojan

Malware Config

Extracted

Family

systembc

C2

towerbingobongoboom.com

62.60.226.86

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__	cubrodriver.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	ghjnsh.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
24	624	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	cubrodriver.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	cubrodriver.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	ghjnsh.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	ghjnsh.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1874072718-2205492803-118941907-1000\Control Panel\International\Geo\Nation	a9749ee52eefb0fd48a66527095354bb.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1874072718-2205492803-118941907-1000\Control Panel\International\Geo\Nation	Gxtuum.exe

Executes dropped EXE 5 IoCs

pid	Process
624	Gxtuum.exe
4692	cubrodriver.exe
2728	ghjnsh.exe
820	Gxtuum.exe
1072	Gxtuum.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-1-5-21-1874072718-2205492803-118941907-1000\Software\Wine	cubrodriver.exe
Key opened	\REGISTRY\USER\S-1-5-21-1874072718-2205492803-118941907-1000\Software\Wine	ghjnsh.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4692	cubrodriver.exe
2728	ghjnsh.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\Gxtuum.job	a9749ee52eefb0fd48a66527095354bb.exe
File created	C:\Windows\Tasks\Test Task17.job	cubrodriver.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	ghjnsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a9749ee52eefb0fd48a66527095354bb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Gxtuum.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cubrodriver.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4692	cubrodriver.exe
4692	cubrodriver.exe
2728	ghjnsh.exe
2728	ghjnsh.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
5060	a9749ee52eefb0fd48a66527095354bb.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5060 wrote to memory of 624	5060	a9749ee52eefb0fd48a66527095354bb.exe	88
PID 5060 wrote to memory of 624	5060	a9749ee52eefb0fd48a66527095354bb.exe	88
PID 5060 wrote to memory of 624	5060	a9749ee52eefb0fd48a66527095354bb.exe	88
PID 624 wrote to memory of 4692	624	Gxtuum.exe	97
PID 624 wrote to memory of 4692	624	Gxtuum.exe	97
PID 624 wrote to memory of 4692	624	Gxtuum.exe	97

C:\Users\Admin\AppData\Local\Temp\a9749ee52eefb0fd48a66527095354bb.exe
"C:\Users\Admin\AppData\Local\Temp\a9749ee52eefb0fd48a66527095354bb.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:5060
- C:\Users\Admin\AppData\Local\Temp\a58456755d\Gxtuum.exe
  "C:\Users\Admin\AppData\Local\Temp\a58456755d\Gxtuum.exe"
  2⤵
  - Downloads MZ/PE file
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:624
- - C:\Users\Admin\AppData\Roaming\10000840100\cubrodriver.exe
    "C:\Users\Admin\AppData\Roaming\10000840100\cubrodriver.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:4692

C:\ProgramData\dnbfuag\ghjnsh.exe
C:\ProgramData\dnbfuag\ghjnsh.exe
1⤵
- 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:2728

C:\Users\Admin\AppData\Local\Temp\a58456755d\Gxtuum.exe
C:\Users\Admin\AppData\Local\Temp\a58456755d\Gxtuum.exe
1⤵
- Executes dropped EXE
PID:820

C:\Users\Admin\AppData\Local\Temp\a58456755d\Gxtuum.exe
C:\Users\Admin\AppData\Local\Temp\a58456755d\Gxtuum.exe
1⤵
- Executes dropped EXE
PID:1072

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

4

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\a58456755d\Gxtuum.exe

Filesize
452KB

MD5
a9749ee52eefb0fd48a66527095354bb

SHA1
78170bcc54e1f774528dea3118b50ffc46064fe0

SHA256
b1663d4497ddd27a59f090b72adcedddac51724a1c126f7d6469f8045d065e15

SHA512
9d21f0e1e376b89df717403a3939ed86ef61095bb9f0167ff15c01d3bbbee03d4dd01b3e2769ecd921e40e43bab3cbf0a6844ab6f296982227b0cb507b4b0e25

Download Submit
C:\Users\Admin\AppData\Roaming\10000840100\cubrodriver.exe

Filesize
1.7MB

MD5
190272ebd2e82a80b242b1bdd442b859

SHA1
fceb12a205c28c30b2049c55924a9872a1a3eb71

SHA256
c13d59dc2e8ee1cbdb8016de0fb3b374f827406fa5d2d1aa4a2820170816d131

SHA512
f3b30d8ea2dd2c451a042b4ed7a9e98d2bcfbb86a88bec2d672a3e1ae6ab3932daf8987eef872e6adb11144f92b9954ac6f6ce67e24a2bc391d7b34ebef876ae

Download Submit
C:\Windows\Tasks\Test Task17.job

Filesize
240B

MD5
f4f04d8ccfcb08e60c6da0e1f483258d

SHA1
44c0c5b351c326d6f4a6cb6d78b3fd105da68f3c

SHA256
450f2ca62e5c0fb53f3fab47b86bc1e8f1dbe85ee30dbd2b2926d9c6344540f5

SHA512
b8f47ca896bdd5077111c4387893a062125decc97f4bb487273c4c91a9b713ffdd814e5e2b05e5f3016eac1f66f02439e41d4a3075093563bad5139039495adb

Download Submit
memory/2728-53-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/2728-55-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/2728-54-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/2728-43-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/2728-56-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/2728-51-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/2728-49-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/2728-47-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/2728-38-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/2728-57-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/2728-45-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/4692-32-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/4692-44-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/4692-41-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/4692-46-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/4692-35-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/4692-48-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/4692-34-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/4692-50-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/4692-33-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/4692-31-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/4692-28-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download
memory/4692-27-0x0000000000401000-0x0000000000403000-memory.dmp

Filesize
8KB

Download
memory/4692-26-0x0000000077464000-0x0000000077466000-memory.dmp

Filesize
8KB

Download
memory/4692-24-0x0000000000400000-0x0000000000840000-memory.dmp

Filesize
4.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads