8c83592274971fd307be6d21fff3a748c0ffec456fcd6f3bb86e947174e4945b

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	3b692ec6fca3e494145a9884da1f7470N.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	explorer.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	spoolsv.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	svchost.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	spoolsv.exe

Checks BIOS information in registry 2 TTPs 10 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\SystemBiosVersion	3b692ec6fca3e494145a9884da1f7470N.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	spoolsv.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	spoolsv.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	spoolsv.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	3b692ec6fca3e494145a9884da1f7470N.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	spoolsv.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	svchost.exe

Executes dropped EXE 4 IoCs

pid	Process
2628	explorer.exe
1384	spoolsv.exe
1704	svchost.exe
1940	spoolsv.exe

Identifies Wine through registry keys 2 TTPs 5 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-1-5-21-3434294380-2554721341-1919518612-1000\Software\Wine	3b692ec6fca3e494145a9884da1f7470N.exe
Key opened	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Wine	explorer.exe
Key opened	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Wine	spoolsv.exe
Key opened	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Wine	svchost.exe
Key opened	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Wine	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2628	explorer.exe
2628	explorer.exe
1384	spoolsv.exe
1384	spoolsv.exe
1704	svchost.exe
1704	svchost.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO"	svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\explorer.exe	explorer.exe
File opened for modification	C:\Windows\SysWOW64\explorer.exe	svchost.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs

pid	Process
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2628	explorer.exe
1384	spoolsv.exe
1704	svchost.exe
1940	spoolsv.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\resources\themes\explorer.exe	3b692ec6fca3e494145a9884da1f7470N.exe
File opened for modification	\??\c:\windows\resources\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\resources\svchost.exe	spoolsv.exe
File opened for modification	C:\Windows\Resources\tjud.exe	explorer.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3b692ec6fca3e494145a9884da1f7470N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

pid	Process
2492	schtasks.exe
1644	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
1384	spoolsv.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
1940	spoolsv.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
2628	explorer.exe
1704	svchost.exe
1704	svchost.exe
1704	svchost.exe
2628	explorer.exe
1704	svchost.exe
2628	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2628	explorer.exe
1704	svchost.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2516	3b692ec6fca3e494145a9884da1f7470N.exe
2628	explorer.exe
2628	explorer.exe
1384	spoolsv.exe
1384	spoolsv.exe
1704	svchost.exe
1704	svchost.exe
1940	spoolsv.exe
1940	spoolsv.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 2628	2516	3b692ec6fca3e494145a9884da1f7470N.exe	30
PID 2516 wrote to memory of 2628	2516	3b692ec6fca3e494145a9884da1f7470N.exe	30
PID 2516 wrote to memory of 2628	2516	3b692ec6fca3e494145a9884da1f7470N.exe	30
PID 2516 wrote to memory of 2628	2516	3b692ec6fca3e494145a9884da1f7470N.exe	30
PID 2628 wrote to memory of 1384	2628	explorer.exe	31
PID 2628 wrote to memory of 1384	2628	explorer.exe	31
PID 2628 wrote to memory of 1384	2628	explorer.exe	31
PID 2628 wrote to memory of 1384	2628	explorer.exe	31
PID 1384 wrote to memory of 1704	1384	spoolsv.exe	32
PID 1384 wrote to memory of 1704	1384	spoolsv.exe	32
PID 1384 wrote to memory of 1704	1384	spoolsv.exe	32
PID 1384 wrote to memory of 1704	1384	spoolsv.exe	32
PID 1704 wrote to memory of 1940	1704	svchost.exe	33
PID 1704 wrote to memory of 1940	1704	svchost.exe	33
PID 1704 wrote to memory of 1940	1704	svchost.exe	33
PID 1704 wrote to memory of 1940	1704	svchost.exe	33
PID 2628 wrote to memory of 2304	2628	explorer.exe	34
PID 2628 wrote to memory of 2304	2628	explorer.exe	34
PID 2628 wrote to memory of 2304	2628	explorer.exe	34
PID 2628 wrote to memory of 2304	2628	explorer.exe	34
PID 1704 wrote to memory of 2492	1704	svchost.exe	35
PID 1704 wrote to memory of 2492	1704	svchost.exe	35
PID 1704 wrote to memory of 2492	1704	svchost.exe	35
PID 1704 wrote to memory of 2492	1704	svchost.exe	35
PID 1704 wrote to memory of 1644	1704	svchost.exe	39
PID 1704 wrote to memory of 1644	1704	svchost.exe	39
PID 1704 wrote to memory of 1644	1704	svchost.exe	39
PID 1704 wrote to memory of 1644	1704	svchost.exe	39

C:\Users\Admin\AppData\Local\Temp\3b692ec6fca3e494145a9884da1f7470N.exe
"C:\Users\Admin\AppData\Local\Temp\3b692ec6fca3e494145a9884da1f7470N.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2516
- \??\c:\windows\resources\themes\explorer.exe
  c:\windows\resources\themes\explorer.exe
  2⤵
  - Modifies visiblity of hidden/system files in Explorer
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Identifies Wine through registry keys
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2628
- - \??\c:\windows\resources\spoolsv.exe
    c:\windows\resources\spoolsv.exe SE
    3⤵
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Identifies Wine through registry keys
    - Loads dropped DLL
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1384
  - - \??\c:\windows\resources\svchost.exe
      c:\windows\resources\svchost.exe
      4⤵
      Modifies visiblity of hidden/system files in Explorer
      Identifies VirtualBox via ACPI registry values (likely anti-VM)
      Checks BIOS information in registry
      Executes dropped EXE
      Identifies Wine through registry keys
      Loads dropped DLL
      Adds Run key to start application
      Drops file in System32 directory
      Suspicious use of NtSetInformationThreadHideFromDebugger
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:1704
    - - \??\c:\windows\resources\spoolsv.exe
        
        c:\windows\resources\spoolsv.exe PR
        5⤵
        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
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of SetWindowsHookEx
        
        PID:1940
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 08:35 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2492
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 08:36 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1644
- - C:\Windows\Explorer.exe
    C:\Windows\Explorer.exe
    3⤵
    PID:2304

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Virtualization/Sandbox Evasion

Credential Access

Discovery

Query Registry

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion