systembc | 253902ece28a0b9e0a03441cbc0b72ebed093e27714b58a8bd95ccabde90edf0

Analysis

max time kernel
266s
max time network
263s
platform
windows10-2004_x64
resource
win10v2004-20250129-de
resource tags

arch:x64arch:x86image:win10v2004-20250129-delocale:de-deos:windows10-2004-x64systemwindows
submitted
04-02-2025 11:40

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General

Target

bluemail.exe
Size

1.6MB
MD5

8df3fab98637bc32a59a5195ff453cab
SHA1

fbbfefa642a2babf53461ea0a9a3651c3fcbb7f6
SHA256

253902ece28a0b9e0a03441cbc0b72ebed093e27714b58a8bd95ccabde90edf0
SHA512

4a4236fb5ed624d9642184d8ba1fd83027165b4dea52c2f74205a0da3c6d8e152c6cd3dddf1f3b0d509501b18a332232c94307d1ac97cf7abf9e5cdba1dc7ec2
SSDEEP

49152:fIBW16KkCbCAcAGXnzR0Uzbt2/W2GmSA8EAp0m:fIM162CsGXnz6XGmSoK

Score

10^/10

systembc defense_evasion discovery trojan

Malware Config

Extracted

Credentials

Protocol: smtp
Host:
smtp.montanasky.us
Port:
587
Username:
[email protected]
Password:
jsg11854

Extracted

Family

systembc

wodresomdaymomentum.org

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__	bluemail.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	clwkttx.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	bluemail.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	bluemail.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	clwkttx.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	clwkttx.exe

Executes dropped EXE 1 IoCs

pid	Process
3804	clwkttx.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-1-5-21-805940606-1861219160-370298170-1000\Software\Wine	bluemail.exe
Key opened	\REGISTRY\USER\S-1-5-21-805940606-1861219160-370298170-1000\Software\Wine	clwkttx.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2316	bluemail.exe
3804	clwkttx.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\Test Task17.job	bluemail.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	bluemail.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	clwkttx.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2316	bluemail.exe
2316	bluemail.exe
3804	clwkttx.exe
3804	clwkttx.exe

C:\Users\Admin\AppData\Local\Temp\bluemail.exe
"C:\Users\Admin\AppData\Local\Temp\bluemail.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:2316

C:\ProgramData\kreqf\clwkttx.exe
C:\ProgramData\kreqf\clwkttx.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:3804

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

C:\ProgramData\kreqf\clwkttx.exe

Filesize
1.6MB

MD5
8df3fab98637bc32a59a5195ff453cab

SHA1
fbbfefa642a2babf53461ea0a9a3651c3fcbb7f6

SHA256
253902ece28a0b9e0a03441cbc0b72ebed093e27714b58a8bd95ccabde90edf0

SHA512
4a4236fb5ed624d9642184d8ba1fd83027165b4dea52c2f74205a0da3c6d8e152c6cd3dddf1f3b0d509501b18a332232c94307d1ac97cf7abf9e5cdba1dc7ec2

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

Filesize
238B

MD5
bc3e3af235289ed0de4590b2ab33d84c

SHA1
a87aeb4f24ea4701f9e6583b378b251f0bc4df94

SHA256
637f794ac16a6744156676e7bf81df7673a8e92af52a432a930a0687f152cfd8

SHA512
58de63404327a01833ddbc1a66244bbc71b0d82548d81cd30ab30c6d894ea19a345ffa4544eb315c2a9a781eb9dcf3230140b3dac8d24561eb3ebaa6c9859aee

Download Submit
memory/2316-8-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/2316-3-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/2316-6-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/2316-7-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/2316-18-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/2316-9-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/2316-10-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/2316-11-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/2316-12-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/2316-2-0x0000000000401000-0x0000000000403000-memory.dmp

Filesize
8KB

Download
memory/2316-0-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/2316-1-0x0000000076F94000-0x0000000076F96000-memory.dmp

Filesize
8KB

Download
memory/2316-22-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-24-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-32-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-20-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-21-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-17-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-15-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-25-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-26-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-27-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-28-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-29-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-30-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-31-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-19-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-33-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-34-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-35-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-36-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-37-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-38-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-39-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-40-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-41-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-42-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-43-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-44-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-45-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/3804-46-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download