orcus | 2ad50133104bbae5d82e85737296e39eecbfec15c270afd2a3b6aa981d53215f

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	Watchdog.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	tmp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	plage.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	orc.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	orc.exe

Loads dropped DLL 20 IoCs

pid	Process
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
4848	blmkgrp.exe
3576	orc.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\orc = "\"C:\\Program Files\\orc\\orc.exe\""	orc.exe

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

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	orc.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	orc.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{AA54BA7C-F281-4046-9711-6B54B1E75182}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{1590E1B9-9C67-4CB2-94F5-15A8A0936480}.catalogItem	svchost.exe
File created	C:\Windows\SysWOW64\WindowsInput.exe	orc.exe
File created	C:\Windows\SysWOW64\WindowsInput.exe.config	orc.exe
File created	C:\Windows\SysWOW64\WindowsInput.InstallState	WindowsInput.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files\orc\orc.exe	orc.exe
File opened for modification	C:\Program Files\orc\orc.exe	orc.exe
File created	C:\Program Files\orc\orc.exe.config	orc.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	orc.exe
File created	C:\Windows\assembly\Desktop.ini	orc.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	orc.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svchost.exe

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
3120	schtasks.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	svchost.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2240	powershell.exe
2240	powershell.exe
3576	orc.exe
3576	orc.exe
4968	Watchdog.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe
3576	orc.exe
4968	Watchdog.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2240	powershell.exe
Token: SeDebugPrivilege	3576	orc.exe
Token: SeDebugPrivilege	4888	Watchdog.exe
Token: SeDebugPrivilege	4968	Watchdog.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 2656 wrote to memory of 4216	2656	tmp.exe	77
PID 2656 wrote to memory of 4216	2656	tmp.exe	77
PID 4216 wrote to memory of 4848	4216	blmkgrp.exe	78
PID 4216 wrote to memory of 4848	4216	blmkgrp.exe	78
PID 2656 wrote to memory of 4744	2656	tmp.exe	79
PID 2656 wrote to memory of 4744	2656	tmp.exe	79
PID 2656 wrote to memory of 3940	2656	tmp.exe	80
PID 2656 wrote to memory of 3940	2656	tmp.exe	80
PID 2656 wrote to memory of 3940	2656	tmp.exe	80
PID 3940 wrote to memory of 3120	3940	plage.exe	81
PID 3940 wrote to memory of 3120	3940	plage.exe	81
PID 3940 wrote to memory of 3120	3940	plage.exe	81
PID 3940 wrote to memory of 3220	3940	plage.exe	83
PID 3940 wrote to memory of 3220	3940	plage.exe	83
PID 3940 wrote to memory of 3220	3940	plage.exe	83
PID 4848 wrote to memory of 5044	4848	blmkgrp.exe	85
PID 4848 wrote to memory of 5044	4848	blmkgrp.exe	85
PID 5044 wrote to memory of 4204	5044	cmd.exe	87
PID 5044 wrote to memory of 4204	5044	cmd.exe	87
PID 4204 wrote to memory of 5024	4204	net.exe	88
PID 4204 wrote to memory of 5024	4204	net.exe	88
PID 4848 wrote to memory of 4624	4848	blmkgrp.exe	89
PID 4848 wrote to memory of 4624	4848	blmkgrp.exe	89
PID 4624 wrote to memory of 2240	4624	cmd.exe	91
PID 4624 wrote to memory of 2240	4624	cmd.exe	91
PID 3940 wrote to memory of 2448	3940	plage.exe	92
PID 3940 wrote to memory of 2448	3940	plage.exe	92
PID 3940 wrote to memory of 2448	3940	plage.exe	92
PID 4744 wrote to memory of 540	4744	orc.exe	97
PID 4744 wrote to memory of 540	4744	orc.exe	97
PID 540 wrote to memory of 1984	540	csc.exe	101
PID 540 wrote to memory of 1984	540	csc.exe	101
PID 4744 wrote to memory of 2856	4744	orc.exe	106
PID 4744 wrote to memory of 2856	4744	orc.exe	106
PID 4744 wrote to memory of 3576	4744	orc.exe	111
PID 4744 wrote to memory of 3576	4744	orc.exe	111
PID 3576 wrote to memory of 4888	3576	orc.exe	113
PID 3576 wrote to memory of 4888	3576	orc.exe	113
PID 3576 wrote to memory of 4888	3576	orc.exe	113
PID 4888 wrote to memory of 4968	4888	Watchdog.exe	115
PID 4888 wrote to memory of 4968	4888	Watchdog.exe	115
PID 4888 wrote to memory of 4968	4888	Watchdog.exe	115

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2656
- C:\Users\Admin\AppData\Local\Temp\blmkgrp.exe
  "C:\Users\Admin\AppData\Local\Temp\blmkgrp.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:4216
- - C:\Users\Admin\AppData\Local\Temp\blmkgrp.exe
    "C:\Users\Admin\AppData\Local\Temp\blmkgrp.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:4848
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c "net session"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:5044
    - - C:\Windows\system32\net.exe
        
        net session
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4204
      - C:\Windows\system32\net1.exe
        
        C:\Windows\system32\net1 session
        6⤵
        
        PID:5024
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c "powershell Set-MpPreference -DisableRealtimeMonitoring $true && netsh Advfirewall set allprofiles state off"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4624
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        powershell Set-MpPreference -DisableRealtimeMonitoring $true
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2240
- C:\Users\Admin\AppData\Local\Temp\orc.exe
  "C:\Users\Admin\AppData\Local\Temp\orc.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Drops desktop.ini file(s)
  - Drops file in System32 directory
  - Drops file in Program Files directory
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4744
- - C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe
    "C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\bur7ng2v.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:540
  - - C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
      C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES1CC0.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC1CBF.tmp"
      4⤵
      PID:1984
- - C:\Windows\SysWOW64\WindowsInput.exe
    "C:\Windows\SysWOW64\WindowsInput.exe" --install
    3⤵
    - Executes dropped EXE
    - Drops file in System32 directory
    PID:2856
- - C:\Program Files\orc\orc.exe
    "C:\Program Files\orc\orc.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Loads dropped DLL
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3576
  - - C:\Users\Admin\AppData\Roaming\Watchdog.exe
      "C:\Users\Admin\AppData\Roaming\Watchdog.exe" /launchSelfAndExit "C:\Program Files\orc\orc.exe" 3576 /protectFile
      4⤵
      Executes dropped EXE
      Checks computer location settings
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4888
    - - C:\Users\Admin\AppData\Roaming\Watchdog.exe
        
        "C:\Users\Admin\AppData\Roaming\Watchdog.exe" /watchProcess "C:\Program Files\orc\orc.exe" 3576 "/protectFile"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4968
- C:\Users\Admin\Downloads\plage.exe
  "C:\Users\Admin\Downloads\plage.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:3940
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /Create /TN "WinManager" /XML "C:\Users\Admin\AppData\Local\Temp\NewTask.xml"
    3⤵
    - Creates scheduled task(s)
    PID:3120
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /Query /FO "LIST" /TN "WinManager"
    3⤵
    PID:3220
- - C:\Users\Admin\AppData\Roaming\discordnitro\winmgr.exe
    "C:\Users\Admin\AppData\Roaming\discordnitro\winmgr.exe" /wait
    3⤵
    - Executes dropped EXE
    PID:2448

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p
1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
PID:2472

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe"
1⤵
- Executes dropped EXE
PID:456

C:\Program Files\orc\orc.exe
"C:\Program Files\orc\orc.exe"
1⤵
- Executes dropped EXE
PID:2140

C:\Users\Admin\AppData\Roaming\discordnitro\winmgr.exe
C:\Users\Admin\AppData\Roaming\discordnitro\winmgr.exe
1⤵
- Executes dropped EXE
PID:1764

C:\Users\Admin\AppData\Roaming\discordnitro\winmgr.exe
C:\Users\Admin\AppData\Roaming\discordnitro\winmgr.exe
1⤵
- Executes dropped EXE
PID:1508

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

Privilege Escalation

Scheduled Task

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

System Information Discovery