c77d02ff3c121a9b6f1363abc64e6daeb1f183df47f3e95802092c0712a988a4

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	svchost.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 5 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	spoolsv.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	1997ce14984d4934d8de66cffd04ae80N.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

Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

description	ioc	Process
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	explorer.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.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\VideoBiosVersion	spoolsv.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	1997ce14984d4934d8de66cffd04ae80N.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	spoolsv.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	1997ce14984d4934d8de66cffd04ae80N.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\SystemBiosVersion	spoolsv.exe

Executes dropped EXE 4 IoCs

pid	Process
2780	explorer.exe
2436	spoolsv.exe
2068	svchost.exe
320	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-1-5-21-3502430532-24693940-2469786940-1000\Software\Wine	1997ce14984d4934d8de66cffd04ae80N.exe
Key opened	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Wine	explorer.exe
Key opened	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Wine	spoolsv.exe
Key opened	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Wine	svchost.exe
Key opened	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Wine	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
1424	1997ce14984d4934d8de66cffd04ae80N.exe
1424	1997ce14984d4934d8de66cffd04ae80N.exe
2780	explorer.exe
2780	explorer.exe
2436	spoolsv.exe
2436	spoolsv.exe
2068	svchost.exe
2068	svchost.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

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

Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs

pid	Process
1424	1997ce14984d4934d8de66cffd04ae80N.exe
2780	explorer.exe
2436	spoolsv.exe
2068	svchost.exe
320	spoolsv.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.exe
File opened for modification	\??\c:\windows\system\explorer.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system\udsys.exe	explorer.exe
File opened for modification	\??\c:\windows\system\explorer.exe	1997ce14984d4934d8de66cffd04ae80N.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 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	1997ce14984d4934d8de66cffd04ae80N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
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	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1424	1997ce14984d4934d8de66cffd04ae80N.exe
1424	1997ce14984d4934d8de66cffd04ae80N.exe
2780	explorer.exe
2436	spoolsv.exe
2068	svchost.exe
320	spoolsv.exe
2780	explorer.exe
2780	explorer.exe
2780	explorer.exe
2780	explorer.exe
2068	svchost.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe
2780	explorer.exe
2068	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2780	explorer.exe
2068	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1424	1997ce14984d4934d8de66cffd04ae80N.exe
1424	1997ce14984d4934d8de66cffd04ae80N.exe
2780	explorer.exe
2780	explorer.exe
2436	spoolsv.exe
2436	spoolsv.exe
2068	svchost.exe
2068	svchost.exe
320	spoolsv.exe
320	spoolsv.exe
2780	explorer.exe
2780	explorer.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1424 wrote to memory of 2780	1424	1997ce14984d4934d8de66cffd04ae80N.exe	31
PID 1424 wrote to memory of 2780	1424	1997ce14984d4934d8de66cffd04ae80N.exe	31
PID 1424 wrote to memory of 2780	1424	1997ce14984d4934d8de66cffd04ae80N.exe	31
PID 1424 wrote to memory of 2780	1424	1997ce14984d4934d8de66cffd04ae80N.exe	31
PID 2780 wrote to memory of 2436	2780	explorer.exe	32
PID 2780 wrote to memory of 2436	2780	explorer.exe	32
PID 2780 wrote to memory of 2436	2780	explorer.exe	32
PID 2780 wrote to memory of 2436	2780	explorer.exe	32
PID 2436 wrote to memory of 2068	2436	spoolsv.exe	33
PID 2436 wrote to memory of 2068	2436	spoolsv.exe	33
PID 2436 wrote to memory of 2068	2436	spoolsv.exe	33
PID 2436 wrote to memory of 2068	2436	spoolsv.exe	33
PID 2068 wrote to memory of 320	2068	svchost.exe	34
PID 2068 wrote to memory of 320	2068	svchost.exe	34
PID 2068 wrote to memory of 320	2068	svchost.exe	34
PID 2068 wrote to memory of 320	2068	svchost.exe	34
PID 2068 wrote to memory of 2220	2068	svchost.exe	35
PID 2068 wrote to memory of 2220	2068	svchost.exe	35
PID 2068 wrote to memory of 2220	2068	svchost.exe	35
PID 2068 wrote to memory of 2220	2068	svchost.exe	35
PID 2068 wrote to memory of 960	2068	svchost.exe	37
PID 2068 wrote to memory of 960	2068	svchost.exe	37
PID 2068 wrote to memory of 960	2068	svchost.exe	37
PID 2068 wrote to memory of 960	2068	svchost.exe	37

C:\Users\Admin\AppData\Local\Temp\1997ce14984d4934d8de66cffd04ae80N.exe
"C:\Users\Admin\AppData\Local\Temp\1997ce14984d4934d8de66cffd04ae80N.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:1424
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Boot or Logon Autostart Execution: Active Setup
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Identifies Wine through registry keys
  - Loads dropped DLL
  - Adds Run key to start application
  - 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:2780
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\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:2436
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Identifies VirtualBox via ACPI registry values (likely anti-VM)
      Boot or Logon Autostart Execution: Active Setup
      Checks BIOS information in registry
      Executes dropped EXE
      Identifies Wine through registry keys
      Loads dropped DLL
      Adds Run key to start application
      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:2068
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\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:320
    - - C:\Windows\SysWOW64\at.exe
        
        at 18:11 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2220
    - - C:\Windows\SysWOW64\at.exe
        
        at 18:12 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:960

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

Virtualization/Sandbox Evasion

Credential Access

Discovery

Query Registry

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion