tofsee | 45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14

Disable or Modify System Firewall

T1562.004

pid	Process
1244	netsh.exe

Sets service image path in registry 3 TTPs 1 IoCs

This determines the executable launched when a service starts. It can be used to establish persistence.

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Windows Service

persistence privilege_escalation

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\iilotd\ImagePath = "C:\\Windows\\SysWOW64\\iilotd\\ryxkssae.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-747854149-4118156852-591593384-1000\Control Panel\International\Geo\Nation	45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
2012	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4236	ryxkssae.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4236 set thread context of 2012	4236	ryxkssae.exe	96

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4484	sc.exe
3288	sc.exe
2924	sc.exe

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

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
5024	cmd.exe
2728	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 9 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	45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ryxkssae.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2068 wrote to memory of 5024	2068	45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14.exe	84
PID 2068 wrote to memory of 2728	2068	45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14.exe	86
PID 2068 wrote to memory of 3288	2068	45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14.exe	88
PID 2068 wrote to memory of 2924	2068	45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14.exe	90
PID 2068 wrote to memory of 4484	2068	45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14.exe	92
PID 4236 wrote to memory of 2012	4236	ryxkssae.exe	96
PID 4236 wrote to memory of 2012	4236	ryxkssae.exe	96
PID 2068 wrote to memory of 1244	2068	45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14.exe	97

C:\Users\Admin\AppData\Local\Temp\45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14.exe
"C:\Users\Admin\AppData\Local\Temp\45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2068
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iilotd\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:5024
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ryxkssae.exe" C:\Windows\SysWOW64\iilotd\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:2728
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create iilotd binPath= "C:\Windows\SysWOW64\iilotd\ryxkssae.exe /d\"C:\Users\Admin\AppData\Local\Temp\45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3288
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description iilotd "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2924
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start iilotd
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4484
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:1244

C:\Windows\SysWOW64\iilotd\ryxkssae.exe
C:\Windows\SysWOW64\iilotd\ryxkssae.exe /d"C:\Users\Admin\AppData\Local\Temp\45dcd961e000d771f97d85be01e00e3eea753fe6fcad74c57893766f7503bc14.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4236
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2012

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Indicator Removal

T1070

File Deletion

Modify Registry

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

2

T1082

System Location Discovery

T1614

System Language Discovery