neshta | b3c4140104b09723a786c120c921b9e46d7b50be5fb0bd4afa7bbb23069948de

Virtualization/Sandbox Evasion

Processes:

NL Brute.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	NL Brute.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

Processes:

NL Brute.exe

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

Executes dropped EXE 1 IoCs

Processes:

NL Brute.exe

pid	Process
1788	NL Brute.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

Processes:

NL Brute.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Wine	NL Brute.exe

Loads dropped DLL 2 IoCs

Processes:

NL Brute.exe

pid	Process
2508	NL Brute.exe
2508	NL Brute.exe

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

Processes:

NL Brute.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	NL Brute.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

NL Brute.exe

pid	Process
1788	NL Brute.exe

Drops file in Windows directory 1 IoCs

Processes:

NL Brute.exe

description	ioc	Process
File opened for modification	C:\Windows\svchost.com	NL Brute.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 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

Processes:

NL Brute.exeNL Brute.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NL Brute.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NL Brute.exe

Modifies registry class 1 IoCs

Processes:

NL Brute.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	NL Brute.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

NL Brute.exe

pid	Process
1788	NL Brute.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

NL Brute.exe

pid	Process
1788	NL Brute.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

NL Brute.exe

description	pid	Process	procid_target
PID 2508 wrote to memory of 1788	2508	NL Brute.exe	31
PID 2508 wrote to memory of 1788	2508	NL Brute.exe	31
PID 2508 wrote to memory of 1788	2508	NL Brute.exe	31
PID 2508 wrote to memory of 1788	2508	NL Brute.exe	31

C:\Users\Admin\AppData\Local\Temp\NL Brute.exe
"C:\Users\Admin\AppData\Local\Temp\NL Brute.exe"
1⤵
- Loads dropped DLL
- Modifies system executable filetype association
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2508
- C:\Users\Admin\AppData\Local\Temp\3582-490\NL Brute.exe
  "C:\Users\Admin\AppData\Local\Temp\3582-490\NL Brute.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
  - Suspicious use of SetWindowsHookEx
  PID:1788

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Privilege Escalation

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Defense Evasion

Modify Registry

T1112

Virtualization/Sandbox Evasion

2

Credential Access

Discovery

Query Registry

3

System Information Discovery

2

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

2