remcos | a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d

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	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Solara2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	Solara2.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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	WScript.exe

Deletes itself 1 IoCs

pid	Process
3828	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
2740	Solara2.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-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	Solara2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	Solara2.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Health\Solara2.exe	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe
File opened for modification	C:\Windows\SysWOW64\Health\Solara2.exe	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe
File opened for modification	C:\Windows\SysWOW64\Health	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2740 set thread context of 3156	2740	Solara2.exe	92

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	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Solara2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000_Classes\Local Settings	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe

Modifies registry key 1 TTPs 2 IoCs

Modify Registry

pid	Process
3568	reg.exe
3652	reg.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2740	Solara2.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 4764 wrote to memory of 1224	4764	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe	83
PID 4764 wrote to memory of 1224	4764	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe	83
PID 4764 wrote to memory of 1224	4764	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe	83
PID 1224 wrote to memory of 3568	1224	cmd.exe	85
PID 1224 wrote to memory of 3568	1224	cmd.exe	85
PID 1224 wrote to memory of 3568	1224	cmd.exe	85
PID 4764 wrote to memory of 3828	4764	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe	86
PID 4764 wrote to memory of 3828	4764	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe	86
PID 4764 wrote to memory of 3828	4764	a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe	86
PID 3828 wrote to memory of 1144	3828	WScript.exe	87
PID 3828 wrote to memory of 1144	3828	WScript.exe	87
PID 3828 wrote to memory of 1144	3828	WScript.exe	87
PID 1144 wrote to memory of 2740	1144	cmd.exe	89
PID 1144 wrote to memory of 2740	1144	cmd.exe	89
PID 1144 wrote to memory of 2740	1144	cmd.exe	89
PID 2740 wrote to memory of 1252	2740	Solara2.exe	90
PID 2740 wrote to memory of 1252	2740	Solara2.exe	90
PID 2740 wrote to memory of 1252	2740	Solara2.exe	90
PID 2740 wrote to memory of 3156	2740	Solara2.exe	92
PID 2740 wrote to memory of 3156	2740	Solara2.exe	92
PID 2740 wrote to memory of 3156	2740	Solara2.exe	92
PID 2740 wrote to memory of 3156	2740	Solara2.exe	92
PID 1252 wrote to memory of 3652	1252	cmd.exe	93
PID 1252 wrote to memory of 3652	1252	cmd.exe	93
PID 1252 wrote to memory of 3652	1252	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe
"C:\Users\Admin\AppData\Local\Temp\a5f81a6aab1ec4f11a07c8f5c1a981363017341eddcd7f8a7569acb3856ce78d.exe"
1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4764
- 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:1224
- - 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:3568
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3828
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\Health\Solara2.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1144
  - - C:\Windows\SysWOW64\Health\Solara2.exe
      C:\Windows\SysWOW64\Health\Solara2.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: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:2740
    - - 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:1252
      - 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:3652
    - - \??\c:\program files (x86)\internet explorer\iexplore.exe
        
        "c:\program files (x86)\internet explorer\iexplore.exe"
        5⤵
        
        PID:3156

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