cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	IYFTXFXLB.tmp

Checks BIOS information in registry 2 TTPs 4 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	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	IYFTXFXLB.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	IYFTXFXLB.tmp

Executes dropped EXE 1 IoCs

pid	Process
1672	IYFTXFXLB.tmp

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.

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Software\Wine	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe
Key opened	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Software\Wine	IYFTXFXLB.tmp

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	IYFTXFXLB.tmp

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4248	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe
1672	IYFTXFXLB.tmp

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	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	IYFTXFXLB.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4248	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe
4248	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe
1672	IYFTXFXLB.tmp
1672	IYFTXFXLB.tmp

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4248	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe
4248	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe
1672	IYFTXFXLB.tmp
1672	IYFTXFXLB.tmp

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4248 wrote to memory of 1672	4248	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe	86
PID 4248 wrote to memory of 1672	4248	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe	86
PID 4248 wrote to memory of 1672	4248	cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe	86

C:\Users\Admin\AppData\Local\Temp\cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.exe
"C:\Users\Admin\AppData\Local\Temp\cd4cfbf18b4dbfad62bcc54e337f6f7c5b980a269b3fe417a17887ce230cb60c.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
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4248
- C:\Users\Admin\AppData\Local\Temp\IYFTXFXLB.tmp
  C:\Users\Admin\AppData\Local\Temp\IYFTXFXLB.tmp
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Identifies Wine through registry keys
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:1672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Virtualization/Sandbox Evasion

2

Credential Access

Discovery

Query Registry

3

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

2