remcos | 828f73827b587c784fad02d7bc4fdd7466845e028eba5c1fcb17d46a44a8acd7

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3181990009-820930284-137514597-1000\Control Panel\International\Geo\Nation	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3181990009-820930284-137514597-1000\Control Panel\International\Geo\Nation	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3181990009-820930284-137514597-1000\Control Panel\International\Geo\Nation	Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3181990009-820930284-137514597-1000\Control Panel\International\Geo\Nation	Synaptics.exe

Executes dropped EXE 5 IoCs

pid	Process
3164	._cache_2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
4288	Synaptics.exe
3812	Synaptics.exe
4452	Synaptics.exe
2096	._cache_Synaptics.exe

Adds Run key to start application 2 TTPs 1 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\Run\Synaptics Pointing Device Driver = "C:\\ProgramData\\Synaptics\\Synaptics.exe"	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1132 set thread context of 4492	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	95
PID 4288 set thread context of 4452	4288	Synaptics.exe	109

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 12 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	._cache_2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Synaptics.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	._cache_Synaptics.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Synaptics.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

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	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	Synaptics.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

pid	Process
1012	schtasks.exe
3288	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
876	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
3780	powershell.exe
1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
1784	powershell.exe
1784	powershell.exe
3780	powershell.exe
4288	Synaptics.exe
4288	Synaptics.exe
4288	Synaptics.exe
4288	Synaptics.exe
1212	powershell.exe
1512	powershell.exe
4288	Synaptics.exe
4288	Synaptics.exe
4288	Synaptics.exe
1212	powershell.exe
1512	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
Token: SeDebugPrivilege	3780	powershell.exe
Token: SeDebugPrivilege	1784	powershell.exe
Token: SeDebugPrivilege	4288	Synaptics.exe
Token: SeDebugPrivilege	1212	powershell.exe
Token: SeDebugPrivilege	1512	powershell.exe

Suspicious use of SetWindowsHookEx 7 IoCs

pid	Process
3164	._cache_2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
876	EXCEL.EXE
876	EXCEL.EXE
876	EXCEL.EXE
876	EXCEL.EXE
876	EXCEL.EXE
876	EXCEL.EXE

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 1132 wrote to memory of 3780	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	89
PID 1132 wrote to memory of 3780	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	89
PID 1132 wrote to memory of 3780	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	89
PID 1132 wrote to memory of 1784	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	91
PID 1132 wrote to memory of 1784	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	91
PID 1132 wrote to memory of 1784	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	91
PID 1132 wrote to memory of 3288	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	93
PID 1132 wrote to memory of 3288	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	93
PID 1132 wrote to memory of 3288	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	93
PID 1132 wrote to memory of 4492	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	95
PID 1132 wrote to memory of 4492	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	95
PID 1132 wrote to memory of 4492	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	95
PID 1132 wrote to memory of 4492	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	95
PID 1132 wrote to memory of 4492	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	95
PID 1132 wrote to memory of 4492	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	95
PID 1132 wrote to memory of 4492	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	95
PID 1132 wrote to memory of 4492	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	95
PID 1132 wrote to memory of 4492	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	95
PID 1132 wrote to memory of 4492	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	95
PID 1132 wrote to memory of 4492	1132	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	95
PID 4492 wrote to memory of 3164	4492	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	96
PID 4492 wrote to memory of 3164	4492	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	96
PID 4492 wrote to memory of 3164	4492	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	96
PID 4492 wrote to memory of 4288	4492	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	97
PID 4492 wrote to memory of 4288	4492	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	97
PID 4492 wrote to memory of 4288	4492	2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe	97
PID 4288 wrote to memory of 1212	4288	Synaptics.exe	102
PID 4288 wrote to memory of 1212	4288	Synaptics.exe	102
PID 4288 wrote to memory of 1212	4288	Synaptics.exe	102
PID 4288 wrote to memory of 1512	4288	Synaptics.exe	104
PID 4288 wrote to memory of 1512	4288	Synaptics.exe	104
PID 4288 wrote to memory of 1512	4288	Synaptics.exe	104
PID 4288 wrote to memory of 1012	4288	Synaptics.exe	106
PID 4288 wrote to memory of 1012	4288	Synaptics.exe	106
PID 4288 wrote to memory of 1012	4288	Synaptics.exe	106
PID 4288 wrote to memory of 3812	4288	Synaptics.exe	108
PID 4288 wrote to memory of 3812	4288	Synaptics.exe	108
PID 4288 wrote to memory of 3812	4288	Synaptics.exe	108
PID 4288 wrote to memory of 4452	4288	Synaptics.exe	109
PID 4288 wrote to memory of 4452	4288	Synaptics.exe	109
PID 4288 wrote to memory of 4452	4288	Synaptics.exe	109
PID 4288 wrote to memory of 4452	4288	Synaptics.exe	109
PID 4288 wrote to memory of 4452	4288	Synaptics.exe	109
PID 4288 wrote to memory of 4452	4288	Synaptics.exe	109
PID 4288 wrote to memory of 4452	4288	Synaptics.exe	109
PID 4288 wrote to memory of 4452	4288	Synaptics.exe	109
PID 4288 wrote to memory of 4452	4288	Synaptics.exe	109
PID 4288 wrote to memory of 4452	4288	Synaptics.exe	109
PID 4288 wrote to memory of 4452	4288	Synaptics.exe	109
PID 4452 wrote to memory of 2096	4452	Synaptics.exe	110
PID 4452 wrote to memory of 2096	4452	Synaptics.exe	110
PID 4452 wrote to memory of 2096	4452	Synaptics.exe	110

C:\Users\Admin\AppData\Local\Temp\2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1132
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3780
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\BLznCuyzwk.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1784
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BLznCuyzwk" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFCFD.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3288
- C:\Users\Admin\AppData\Local\Temp\2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
  "C:\Users\Admin\AppData\Local\Temp\2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:4492
- - C:\Users\Admin\AppData\Local\Temp\._cache_2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe
    "C:\Users\Admin\AppData\Local\Temp\._cache_2025-02-23_313ffe2d1d737e2f1deec4ade563f405_avoslocker_formbook_hijackloader_luca-stealer.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:3164
- - C:\ProgramData\Synaptics\Synaptics.exe
    "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4288
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\ProgramData\Synaptics\Synaptics.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1212
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\BLznCuyzwk.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1512
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BLznCuyzwk" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5966.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1012
  - - C:\ProgramData\Synaptics\Synaptics.exe
      "C:\ProgramData\Synaptics\Synaptics.exe"
      4⤵
      Executes dropped EXE
      PID:3812
  - - C:\ProgramData\Synaptics\Synaptics.exe
      "C:\ProgramData\Synaptics\Synaptics.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Modifies registry class
      Suspicious use of WriteProcessMemory
      PID:4452
    - - C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe
        
        "C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        
        PID:2096

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" /automation -Embedding
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:876

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

Modify Registry

T1112

Credential Access

Discovery

Query Registry

System Information Discovery