amadey | 105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	explorta.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	explorta.exe

Checks BIOS information in registry 2 TTPs 6 IoCs

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

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorta.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	explorta.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorta.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	explorta.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.exe

Executes dropped EXE 2 IoCs

pid	Process
3176	explorta.exe
4508	explorta.exe

Themida packer 30 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/848-0-0x0000000000F00000-0x00000000013E7000-memory.dmp	themida
behavioral2/memory/848-2-0x0000000000F00000-0x00000000013E7000-memory.dmp	themida
behavioral2/memory/848-3-0x0000000000F00000-0x00000000013E7000-memory.dmp	themida
behavioral2/memory/848-1-0x0000000000F00000-0x00000000013E7000-memory.dmp	themida
behavioral2/memory/848-7-0x0000000000F00000-0x00000000013E7000-memory.dmp	themida
behavioral2/memory/848-6-0x0000000000F00000-0x00000000013E7000-memory.dmp	themida
behavioral2/memory/848-8-0x0000000000F00000-0x00000000013E7000-memory.dmp	themida
behavioral2/memory/848-4-0x0000000000F00000-0x00000000013E7000-memory.dmp	themida
behavioral2/memory/848-5-0x0000000000F00000-0x00000000013E7000-memory.dmp	themida
behavioral2/files/0x0007000000023c97-14.dat	themida
behavioral2/memory/848-23-0x0000000000F00000-0x00000000013E7000-memory.dmp	themida
behavioral2/memory/3176-24-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/3176-25-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/3176-27-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/3176-26-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/3176-22-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/3176-20-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/3176-30-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/3176-29-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/3176-28-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/3176-31-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/4508-33-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/4508-35-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/4508-34-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/4508-38-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/4508-39-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/4508-37-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/4508-36-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/4508-40-0x0000000000E20000-0x0000000001307000-memory.dmp	themida
behavioral2/memory/4508-42-0x0000000000E20000-0x0000000001307000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 3 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	explorta.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	explorta.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\explorta.job	105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.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	105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorta.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorta.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
848	105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 848 wrote to memory of 3176	848	105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.exe	84
PID 848 wrote to memory of 3176	848	105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.exe	84
PID 848 wrote to memory of 3176	848	105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.exe	84

C:\Users\Admin\AppData\Local\Temp\105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.exe
"C:\Users\Admin\AppData\Local\Temp\105e328b76537631b6bf443a48dc288193db152a1ef25408373727aa1fc77fa9.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Checks whether UAC is enabled
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:848
- C:\Users\Admin\AppData\Local\Temp\5454e6f062\explorta.exe
  "C:\Users\Admin\AppData\Local\Temp\5454e6f062\explorta.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - System Location Discovery: System Language Discovery
  PID:3176

C:\Users\Admin\AppData\Local\Temp\5454e6f062\explorta.exe
C:\Users\Admin\AppData\Local\Temp\5454e6f062\explorta.exe
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- System Location Discovery: System Language Discovery
PID:4508

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

3

System Information Discovery

4

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion