ae14b287be4c2cb072802d65693beeb9efecefd6e6de5994abe49546b8ca0308

Virtualization/Sandbox Evasion

T1497

Processes:

tmp.exeO.exe

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

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

Processes:

tmp.exeO.exe

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

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

System Information Discovery

Processes:

tmp.exeO.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2474409663-2236862430-1045297337-1000\Control Panel\International\Geo\Nation	tmp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2474409663-2236862430-1045297337-1000\Control Panel\International\Geo\Nation	O.exe

Executes dropped EXE 1 IoCs

Processes:

O.exe

pid	Process
4044	O.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

Processes:

tmp.exeO.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	tmp.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	O.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

tmp.exeO.exe

pid	Process
4640	tmp.exe
4044	O.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

Processes:

schtasks.exe

pid	Process
2900	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

Processes:

timeout.exe

pid	Process
3876	timeout.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

tmp.execmd.exeO.exe

description	pid	Process	procid_target
PID 4640 wrote to memory of 4032	4640	tmp.exe	92
PID 4640 wrote to memory of 4032	4640	tmp.exe	92
PID 4640 wrote to memory of 4032	4640	tmp.exe	92
PID 4032 wrote to memory of 3876	4032	cmd.exe	94
PID 4032 wrote to memory of 3876	4032	cmd.exe	94
PID 4032 wrote to memory of 3876	4032	cmd.exe	94
PID 4032 wrote to memory of 4044	4032	cmd.exe	97
PID 4032 wrote to memory of 4044	4032	cmd.exe	97
PID 4032 wrote to memory of 4044	4032	cmd.exe	97
PID 4044 wrote to memory of 2900	4044	O.exe	100
PID 4044 wrote to memory of 2900	4044	O.exe	100
PID 4044 wrote to memory of 2900	4044	O.exe	100

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.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
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:4640
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\s3kw.0.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4032
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3876
- - C:\ProgramData\Roaming\O.exe
    "C:\ProgramData\Roaming\O.exe"
    3⤵
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Checks BIOS information in registry
    - Checks computer location settings
    - Executes dropped EXE
    - Checks whether UAC is enabled
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious use of WriteProcessMemory
    PID:4044
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc MINUTE /mo 1 /RL HIGHEST /tn "O" /tr C:\ProgramData\Roaming\O.exe /f
      4⤵
      Creates scheduled task(s)
      PID:2900

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Scheduled Task/Job

Privilege Escalation

Scheduled Task/Job

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

3

System Information Discovery

4

Virtualization/Sandbox Evasion