stealc | bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe

Deletes itself 1 IoCs

pid	Process
2736	cmd.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

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

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Wine	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe

Loads dropped DLL 1 IoCs

pid	Process
2104	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

Credentials In Files
T1552.001
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2104	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.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 3 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	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2728	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2104	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe
2104	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2104 wrote to memory of 2736	2104	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe	31
PID 2104 wrote to memory of 2736	2104	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe	31
PID 2104 wrote to memory of 2736	2104	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe	31
PID 2104 wrote to memory of 2736	2104	bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe	31
PID 2736 wrote to memory of 2728	2736	cmd.exe	33
PID 2736 wrote to memory of 2728	2736	cmd.exe	33
PID 2736 wrote to memory of 2728	2736	cmd.exe	33
PID 2736 wrote to memory of 2728	2736	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe
"C:\Users\Admin\AppData\Local\Temp\bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\bfcf6c46d64eb87be63df45a15ff9c2a89bd66af62942756ec4dbd45cdfe6ebd.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2736
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

5

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion