67cfdfdb26f8a2ad408fa8e56b8871bbf4657657ef0c263856edaf129378df18

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	tmp.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	WindowsPaint-Ver9.1.7.5.exe

Executes dropped EXE 1 IoCs

pid	Process
2944	WindowsPaint-Ver9.1.7.5.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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	tmp.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	WindowsPaint-Ver9.1.7.5.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	WindowsPaint-Ver9.1.7.5.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	tmp.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	tmp.exe

Modifies file permissions 1 TTPs 3 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1324	icacls.exe
2940	icacls.exe
4312	icacls.exe

Themida packer 11 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/444-132-0x00000000003C0000-0x0000000000770000-memory.dmp	themida
behavioral2/memory/444-133-0x00000000003C0000-0x0000000000770000-memory.dmp	themida
behavioral2/memory/444-134-0x00000000003C0000-0x0000000000770000-memory.dmp	themida
behavioral2/memory/444-136-0x00000000003C0000-0x0000000000770000-memory.dmp	themida
behavioral2/files/0x0006000000023151-140.dat	themida
behavioral2/memory/444-141-0x00000000003C0000-0x0000000000770000-memory.dmp	themida
behavioral2/files/0x0006000000023151-142.dat	themida
behavioral2/memory/2944-143-0x0000000000610000-0x00000000009C0000-memory.dmp	themida
behavioral2/memory/2944-144-0x0000000000610000-0x00000000009C0000-memory.dmp	themida
behavioral2/memory/2944-145-0x0000000000610000-0x00000000009C0000-memory.dmp	themida
behavioral2/memory/2944-146-0x0000000000610000-0x00000000009C0000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

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	WindowsPaint-Ver9.1.7.5.exe

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

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

pid	Process
4696	schtasks.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 444 wrote to memory of 4696	444	tmp.exe	80
PID 444 wrote to memory of 4696	444	tmp.exe	80
PID 444 wrote to memory of 4696	444	tmp.exe	80
PID 444 wrote to memory of 1324	444	tmp.exe	88
PID 444 wrote to memory of 1324	444	tmp.exe	88
PID 444 wrote to memory of 1324	444	tmp.exe	88
PID 444 wrote to memory of 2940	444	tmp.exe	90
PID 444 wrote to memory of 2940	444	tmp.exe	90
PID 444 wrote to memory of 2940	444	tmp.exe	90
PID 444 wrote to memory of 4312	444	tmp.exe	92
PID 444 wrote to memory of 4312	444	tmp.exe	92
PID 444 wrote to memory of 4312	444	tmp.exe	92

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 WriteProcessMemory
PID:444
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /CREATE /TN "Windows\IntelComputingTooIklt\IntelPaint9.1.7.5." /TR "C:\ProgramData\MsiBoost\WindowsPaint-Ver9.1.7.5.exe" /SC MINUTE
  2⤵
  - Creates scheduled task(s)
  PID:4696
- C:\Windows\SysWOW64\icacls.exe
  "C:\Windows\System32\icacls.exe" "C:\ProgramData\MsiBoost" /inheritance:e /deny "*S-1-1-0:(R,REA,RA,RD)"
  2⤵
  - Modifies file permissions
  PID:1324
- C:\Windows\SysWOW64\icacls.exe
  "C:\Windows\System32\icacls.exe" "C:\ProgramData\MsiBoost" /inheritance:e /deny "*S-1-5-7:(R,REA,RA,RD)"
  2⤵
  - Modifies file permissions
  PID:2940
- C:\Windows\SysWOW64\icacls.exe
  "C:\Windows\System32\icacls.exe" "C:\ProgramData\MsiBoost" /inheritance:e /deny "admin:(R,REA,RA,RD)"
  2⤵
  - Modifies file permissions
  PID:4312

C:\ProgramData\MsiBoost\WindowsPaint-Ver9.1.7.5.exe
C:\ProgramData\MsiBoost\WindowsPaint-Ver9.1.7.5.exe
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Executes dropped EXE
- Checks BIOS information in registry
- Checks whether UAC is enabled
PID:2944

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Persistence

Scheduled Task

Privilege Escalation

Scheduled Task

Defense Evasion

File and Directory Permissions Modification

T1222

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

3

System Information Discovery

4

Virtualization/Sandbox Evasion