remcos | 47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
4312	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4312 set thread context of 4572	4312	remcos.exe	91

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 8 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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe

Modifies registry key 1 TTPs 2 IoCs

Modify Registry

pid	Process
2436	reg.exe
3104	reg.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4312	remcos.exe
4312	remcos.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4312	remcos.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2752 wrote to memory of 216	2752	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe	83
PID 2752 wrote to memory of 216	2752	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe	83
PID 2752 wrote to memory of 216	2752	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe	83
PID 216 wrote to memory of 2436	216	cmd.exe	85
PID 216 wrote to memory of 2436	216	cmd.exe	85
PID 216 wrote to memory of 2436	216	cmd.exe	85
PID 2752 wrote to memory of 4592	2752	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe	86
PID 2752 wrote to memory of 4592	2752	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe	86
PID 2752 wrote to memory of 4592	2752	47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe	86
PID 4592 wrote to memory of 1624	4592	WScript.exe	87
PID 4592 wrote to memory of 1624	4592	WScript.exe	87
PID 4592 wrote to memory of 1624	4592	WScript.exe	87
PID 1624 wrote to memory of 4312	1624	cmd.exe	89
PID 1624 wrote to memory of 4312	1624	cmd.exe	89
PID 1624 wrote to memory of 4312	1624	cmd.exe	89
PID 4312 wrote to memory of 5116	4312	remcos.exe	90
PID 4312 wrote to memory of 5116	4312	remcos.exe	90
PID 4312 wrote to memory of 5116	4312	remcos.exe	90
PID 4312 wrote to memory of 4572	4312	remcos.exe	91
PID 4312 wrote to memory of 4572	4312	remcos.exe	91
PID 4312 wrote to memory of 4572	4312	remcos.exe	91
PID 4312 wrote to memory of 4572	4312	remcos.exe	91
PID 5116 wrote to memory of 3104	5116	cmd.exe	93
PID 5116 wrote to memory of 3104	5116	cmd.exe	93
PID 5116 wrote to memory of 3104	5116	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe
"C:\Users\Admin\AppData\Local\Temp\47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628.exe"
1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2752
- C:\Windows\SysWOW64\cmd.exe
  /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:216
- - C:\Windows\SysWOW64\reg.exe
    C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - UAC bypass
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:2436
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4592
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\remcos.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1624
  - - C:\ProgramData\Remcos\remcos.exe
      C:\ProgramData\Remcos\remcos.exe
      4⤵
      Adds policy Run key to start application
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:4312
    - - C:\Windows\SysWOW64\cmd.exe
        
        /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:5116
      - C:\Windows\SysWOW64\reg.exe
        
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        6⤵
        UAC bypass
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:3104
    - - \??\c:\program files (x86)\internet explorer\iexplore.exe
        
        "c:\program files (x86)\internet explorer\iexplore.exe"
        5⤵
        
        PID:4572

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery