b6d43405e5d36e6e74de2ff2d22d864edb0db18f9db4e928def7155054b4e252

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Oracle\VirtualBox Guest Additions	loader.exe

Looks for VMWare Tools registry key 2 TTPs 1 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\VMware, Inc.\VMware Tools	loader.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

T1082

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

Executes dropped EXE 6 IoCs

pid	Process
2348	loader.exe
2688	icsys.icn.exe
2804	explorer.exe
1036	spoolsv.exe
2764	svchost.exe
2624	spoolsv.exe

Loads dropped DLL 11 IoCs

pid	Process
1976	Loader.exe
1976	Loader.exe
2688	icsys.icn.exe
2804	explorer.exe
1036	spoolsv.exe
2764	svchost.exe
2192	WerFault.exe
2192	WerFault.exe
2192	WerFault.exe
2192	WerFault.exe
2192	WerFault.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

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	loader.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	loader.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

Drops file in Windows directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Resources\tjud.exe	explorer.exe
File opened for modification	C:\Windows\Resources\Themes\icsys.icn.exe	Loader.exe
File opened for modification	\??\c:\windows\resources\themes\explorer.exe	icsys.icn.exe
File opened for modification	\??\c:\windows\resources\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\resources\svchost.exe	spoolsv.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2192	2348	WerFault.exe	29

System Location Discovery: System Language Discovery 1 TTPs 10 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Loader.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	loader.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icsys.icn.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

persistence execution

Scheduled Task

pid	Process
1524	schtasks.exe
440	schtasks.exe
1960	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
1976	Loader.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2804	explorer.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe
2764	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2804	explorer.exe
2764	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2348	loader.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1976	Loader.exe
1976	Loader.exe
2688	icsys.icn.exe
2688	icsys.icn.exe
2804	explorer.exe
2804	explorer.exe
1036	spoolsv.exe
1036	spoolsv.exe
2764	svchost.exe
2764	svchost.exe
2624	spoolsv.exe
2624	spoolsv.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 2348	1976	Loader.exe	29
PID 1976 wrote to memory of 2348	1976	Loader.exe	29
PID 1976 wrote to memory of 2348	1976	Loader.exe	29
PID 1976 wrote to memory of 2348	1976	Loader.exe	29
PID 1976 wrote to memory of 2688	1976	Loader.exe	30
PID 1976 wrote to memory of 2688	1976	Loader.exe	30
PID 1976 wrote to memory of 2688	1976	Loader.exe	30
PID 1976 wrote to memory of 2688	1976	Loader.exe	30
PID 2688 wrote to memory of 2804	2688	icsys.icn.exe	31
PID 2688 wrote to memory of 2804	2688	icsys.icn.exe	31
PID 2688 wrote to memory of 2804	2688	icsys.icn.exe	31
PID 2688 wrote to memory of 2804	2688	icsys.icn.exe	31
PID 2804 wrote to memory of 1036	2804	explorer.exe	33
PID 2804 wrote to memory of 1036	2804	explorer.exe	33
PID 2804 wrote to memory of 1036	2804	explorer.exe	33
PID 2804 wrote to memory of 1036	2804	explorer.exe	33
PID 1036 wrote to memory of 2764	1036	spoolsv.exe	34
PID 1036 wrote to memory of 2764	1036	spoolsv.exe	34
PID 1036 wrote to memory of 2764	1036	spoolsv.exe	34
PID 1036 wrote to memory of 2764	1036	spoolsv.exe	34
PID 2764 wrote to memory of 2624	2764	svchost.exe	35
PID 2764 wrote to memory of 2624	2764	svchost.exe	35
PID 2764 wrote to memory of 2624	2764	svchost.exe	35
PID 2764 wrote to memory of 2624	2764	svchost.exe	35
PID 2804 wrote to memory of 2220	2804	explorer.exe	36
PID 2804 wrote to memory of 2220	2804	explorer.exe	36
PID 2804 wrote to memory of 2220	2804	explorer.exe	36
PID 2804 wrote to memory of 2220	2804	explorer.exe	36
PID 2764 wrote to memory of 1524	2764	svchost.exe	37
PID 2764 wrote to memory of 1524	2764	svchost.exe	37
PID 2764 wrote to memory of 1524	2764	svchost.exe	37
PID 2764 wrote to memory of 1524	2764	svchost.exe	37
PID 2348 wrote to memory of 2192	2348	loader.exe	39
PID 2348 wrote to memory of 2192	2348	loader.exe	39
PID 2348 wrote to memory of 2192	2348	loader.exe	39
PID 2348 wrote to memory of 2192	2348	loader.exe	39
PID 2764 wrote to memory of 440	2764	svchost.exe	41
PID 2764 wrote to memory of 440	2764	svchost.exe	41
PID 2764 wrote to memory of 440	2764	svchost.exe	41
PID 2764 wrote to memory of 440	2764	svchost.exe	41
PID 2764 wrote to memory of 1960	2764	svchost.exe	44
PID 2764 wrote to memory of 1960	2764	svchost.exe	44
PID 2764 wrote to memory of 1960	2764	svchost.exe	44
PID 2764 wrote to memory of 1960	2764	svchost.exe	44

C:\Users\Admin\AppData\Local\Temp\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1976
- \??\c:\users\admin\appdata\local\temp\loader.exe
  c:\users\admin\appdata\local\temp\loader.exe
  2⤵
  - Looks for VirtualBox Guest Additions in registry
  - Looks for VMWare Tools registry key
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Maps connected drives based on registry
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2348
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2348 -s 16380
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2192
- C:\Windows\Resources\Themes\icsys.icn.exe
  C:\Windows\Resources\Themes\icsys.icn.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2688
- - \??\c:\windows\resources\themes\explorer.exe
    c:\windows\resources\themes\explorer.exe
    3⤵
    - Modifies visiblity of hidden/system files in Explorer
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - Drops file in System32 directory
    - 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:2804
  - - \??\c:\windows\resources\spoolsv.exe
      c:\windows\resources\spoolsv.exe SE
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:1036
    - - \??\c:\windows\resources\svchost.exe
        
        c:\windows\resources\svchost.exe
        5⤵
        Modifies visiblity of hidden/system files in Explorer
        Executes dropped EXE
        Loads dropped DLL
        Adds Run key to start application
        Drops file in System32 directory
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2764
      - \??\c:\windows\resources\spoolsv.exe
        
        c:\windows\resources\spoolsv.exe PR
        6⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2624
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 06:29 /f
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1524
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 06:30 /f
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:440
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 06:31 /f
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1960
  - - C:\Windows\Explorer.exe
      C:\Windows\Explorer.exe
      4⤵
      PID:2220

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

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion