stealc | 3aaa6bb7d6b82cc554bb14493af5afe184125089a9aa1c3759b82fbb7241c87a

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	S0FTWARE.exe

Checks BIOS information in registry 2 TTPs 2 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\SystemBiosVersion	S0FTWARE.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	S0FTWARE.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	S0FTWARE.exe

Themida packer 9 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/3380-0-0x0000000000F10000-0x0000000001708000-memory.dmp	themida
behavioral2/memory/3380-7-0x0000000000F10000-0x0000000001708000-memory.dmp	themida
behavioral2/memory/3380-8-0x0000000000F10000-0x0000000001708000-memory.dmp	themida
behavioral2/memory/3380-9-0x0000000000F10000-0x0000000001708000-memory.dmp	themida
behavioral2/memory/3380-11-0x0000000000F10000-0x0000000001708000-memory.dmp	themida
behavioral2/memory/3380-10-0x0000000000F10000-0x0000000001708000-memory.dmp	themida
behavioral2/memory/3380-12-0x0000000000F10000-0x0000000001708000-memory.dmp	themida
behavioral2/memory/3380-17-0x0000000000F10000-0x0000000001708000-memory.dmp	themida
behavioral2/memory/3380-28-0x0000000000F10000-0x0000000001708000-memory.dmp	themida

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	S0FTWARE.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3380	S0FTWARE.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	S0FTWARE.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor 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\CentralProcessor\0\ProcessorNameString	S0FTWARE.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	S0FTWARE.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4972	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3380	S0FTWARE.exe
3380	S0FTWARE.exe
3380	S0FTWARE.exe
3380	S0FTWARE.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3380 wrote to memory of 1192	3380	S0FTWARE.exe	89
PID 3380 wrote to memory of 1192	3380	S0FTWARE.exe	89
PID 3380 wrote to memory of 1192	3380	S0FTWARE.exe	89
PID 1192 wrote to memory of 4972	1192	cmd.exe	91
PID 1192 wrote to memory of 4972	1192	cmd.exe	91
PID 1192 wrote to memory of 4972	1192	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\S0FTWARE.exe
"C:\Users\Admin\AppData\Local\Temp\S0FTWARE.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
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3380
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\S0FTWARE.exe" & rd /s /q "C:\ProgramData\CBFBGCGIJKJJ" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1192
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 10
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4972

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

5

System Information Discovery

5

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion