amadey | 73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	explorti.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	explorti.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	explorti.exe

Downloads MZ/PE file

Checks BIOS information in registry 2 TTPs 8 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\VideoBiosVersion	explorti.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorti.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	explorti.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorti.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	explorti.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorti.exe

Executes dropped EXE 4 IoCs

pid	Process
4756	explorti.exe
3036	0f5d0068a3.exe
4044	explorti.exe
3508	explorti.exe

Identifies Wine through registry keys 2 TTPs 4 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-1-5-21-1210443139-7911939-2760828654-1000\Software\Wine	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe
Key opened	\REGISTRY\USER\S-1-5-21-1210443139-7911939-2760828654-1000\Software\Wine	explorti.exe
Key opened	\REGISTRY\USER\S-1-5-21-1210443139-7911939-2760828654-1000\Software\Wine	explorti.exe
Key opened	\REGISTRY\USER\S-1-5-21-1210443139-7911939-2760828654-1000\Software\Wine	explorti.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1210443139-7911939-2760828654-1000\Software\Microsoft\Windows\CurrentVersion\Run\0f5d0068a3.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1000021001\\0f5d0068a3.exe"	explorti.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs

pid	Process
4552	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe
4756	explorti.exe
4044	explorti.exe
3508	explorti.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\explorti.job	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2076	3036	WerFault.exe	84

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	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorti.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0f5d0068a3.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4552	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe
4552	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe
4756	explorti.exe
4756	explorti.exe
4044	explorti.exe
4044	explorti.exe
3508	explorti.exe
3508	explorti.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4552	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4552 wrote to memory of 4756	4552	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe	82
PID 4552 wrote to memory of 4756	4552	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe	82
PID 4552 wrote to memory of 4756	4552	73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe	82
PID 4756 wrote to memory of 2032	4756	explorti.exe	83
PID 4756 wrote to memory of 2032	4756	explorti.exe	83
PID 4756 wrote to memory of 2032	4756	explorti.exe	83
PID 4756 wrote to memory of 3036	4756	explorti.exe	84
PID 4756 wrote to memory of 3036	4756	explorti.exe	84
PID 4756 wrote to memory of 3036	4756	explorti.exe	84

C:\Users\Admin\AppData\Local\Temp\73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.exe
"C:\Users\Admin\AppData\Local\Temp\73b18034b92e7b3dd1ec7694c1aa14acf221c8b4e82ae2ffa8e748d74d3fe6b3.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
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:4552
- C:\Users\Admin\AppData\Local\Temp\ad40971b6b\explorti.exe
  "C:\Users\Admin\AppData\Local\Temp\ad40971b6b\explorti.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Identifies Wine through registry keys
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4756
- - C:\Users\Admin\AppData\Local\Temp\ad40971b6b\explorti.exe
    "C:\Users\Admin\AppData\Local\Temp\ad40971b6b\explorti.exe"
    3⤵
    PID:2032
- - C:\Users\Admin\AppData\Local\Temp\1000021001\0f5d0068a3.exe
    "C:\Users\Admin\AppData\Local\Temp\1000021001\0f5d0068a3.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3036
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3036 -s 1096
      4⤵
      Program crash
      PID:2076

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3036 -ip 3036
1⤵
PID:1304

C:\Users\Admin\AppData\Local\Temp\ad40971b6b\explorti.exe
C:\Users\Admin\AppData\Local\Temp\ad40971b6b\explorti.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
- Suspicious behavior: EnumeratesProcesses
PID:4044

C:\Users\Admin\AppData\Local\Temp\ad40971b6b\explorti.exe
C:\Users\Admin\AppData\Local\Temp\ad40971b6b\explorti.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
- Suspicious behavior: EnumeratesProcesses
PID:3508

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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