remcos | b120a5a4ec9d40696f7823fbf1044b4c4a6e2793ba336917bd9246a6beea9385

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	Synaptics.exe

Executes dropped EXE 5 IoCs

pid	Process
3428	._cache_2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
4684	Synaptics.exe
2648	Synaptics.exe
1540	Synaptics.exe
400	._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"	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2536 set thread context of 2524	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	103
PID 4684 set thread context of 1540	4684	Synaptics.exe	117

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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Synaptics.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	._cache_2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	._cache_Synaptics.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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\	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_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
3636	schtasks.exe
1944	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2800	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
60	powershell.exe
2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
3156	powershell.exe
60	powershell.exe
3156	powershell.exe
4684	Synaptics.exe
4684	Synaptics.exe
4684	Synaptics.exe
4684	Synaptics.exe
2168	powershell.exe
4684	Synaptics.exe
4684	Synaptics.exe
3080	powershell.exe
4684	Synaptics.exe
2168	powershell.exe
3080	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
Token: SeDebugPrivilege	60	powershell.exe
Token: SeDebugPrivilege	3156	powershell.exe
Token: SeDebugPrivilege	4684	Synaptics.exe
Token: SeDebugPrivilege	2168	powershell.exe
Token: SeDebugPrivilege	3080	powershell.exe

Suspicious use of SetWindowsHookEx 9 IoCs

pid	Process
3428	._cache_2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE
2800	EXCEL.EXE

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 60	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	97
PID 2536 wrote to memory of 60	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	97
PID 2536 wrote to memory of 60	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	97
PID 2536 wrote to memory of 3156	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	99
PID 2536 wrote to memory of 3156	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	99
PID 2536 wrote to memory of 3156	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	99
PID 2536 wrote to memory of 3636	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	101
PID 2536 wrote to memory of 3636	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	101
PID 2536 wrote to memory of 3636	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	101
PID 2536 wrote to memory of 2524	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	103
PID 2536 wrote to memory of 2524	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	103
PID 2536 wrote to memory of 2524	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	103
PID 2536 wrote to memory of 2524	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	103
PID 2536 wrote to memory of 2524	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	103
PID 2536 wrote to memory of 2524	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	103
PID 2536 wrote to memory of 2524	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	103
PID 2536 wrote to memory of 2524	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	103
PID 2536 wrote to memory of 2524	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	103
PID 2536 wrote to memory of 2524	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	103
PID 2536 wrote to memory of 2524	2536	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	103
PID 2524 wrote to memory of 3428	2524	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	104
PID 2524 wrote to memory of 3428	2524	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	104
PID 2524 wrote to memory of 3428	2524	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	104
PID 2524 wrote to memory of 4684	2524	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	105
PID 2524 wrote to memory of 4684	2524	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	105
PID 2524 wrote to memory of 4684	2524	2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe	105
PID 4684 wrote to memory of 2168	4684	Synaptics.exe	110
PID 4684 wrote to memory of 2168	4684	Synaptics.exe	110
PID 4684 wrote to memory of 2168	4684	Synaptics.exe	110
PID 4684 wrote to memory of 3080	4684	Synaptics.exe	112
PID 4684 wrote to memory of 3080	4684	Synaptics.exe	112
PID 4684 wrote to memory of 3080	4684	Synaptics.exe	112
PID 4684 wrote to memory of 1944	4684	Synaptics.exe	114
PID 4684 wrote to memory of 1944	4684	Synaptics.exe	114
PID 4684 wrote to memory of 1944	4684	Synaptics.exe	114
PID 4684 wrote to memory of 2648	4684	Synaptics.exe	116
PID 4684 wrote to memory of 2648	4684	Synaptics.exe	116
PID 4684 wrote to memory of 2648	4684	Synaptics.exe	116
PID 4684 wrote to memory of 1540	4684	Synaptics.exe	117
PID 4684 wrote to memory of 1540	4684	Synaptics.exe	117
PID 4684 wrote to memory of 1540	4684	Synaptics.exe	117
PID 4684 wrote to memory of 1540	4684	Synaptics.exe	117
PID 4684 wrote to memory of 1540	4684	Synaptics.exe	117
PID 4684 wrote to memory of 1540	4684	Synaptics.exe	117
PID 4684 wrote to memory of 1540	4684	Synaptics.exe	117
PID 4684 wrote to memory of 1540	4684	Synaptics.exe	117
PID 4684 wrote to memory of 1540	4684	Synaptics.exe	117
PID 4684 wrote to memory of 1540	4684	Synaptics.exe	117
PID 4684 wrote to memory of 1540	4684	Synaptics.exe	117
PID 1540 wrote to memory of 400	1540	Synaptics.exe	118
PID 1540 wrote to memory of 400	1540	Synaptics.exe	118
PID 1540 wrote to memory of 400	1540	Synaptics.exe	118

C:\Users\Admin\AppData\Local\Temp\2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
"C:\Users\Admin\AppData\Local\Temp\2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_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:2536
- 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\2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_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:60
- 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:3156
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BLznCuyzwk" /XML "C:\Users\Admin\AppData\Local\Temp\tmp961.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3636
- C:\Users\Admin\AppData\Local\Temp\2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
  "C:\Users\Admin\AppData\Local\Temp\2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_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:2524
- - C:\Users\Admin\AppData\Local\Temp\._cache_2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe
    "C:\Users\Admin\AppData\Local\Temp\._cache_2024-11-19_8d832c37b858dc1a58a07208d1aeabe9_avoslocker_formbook_hijackloader_luca-stealer.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:3428
- - 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:4684
  - - 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:2168
  - - 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:3080
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BLznCuyzwk" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7654.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1944
  - - C:\ProgramData\Synaptics\Synaptics.exe
      "C:\ProgramData\Synaptics\Synaptics.exe"
      4⤵
      Executes dropped EXE
      PID:2648
  - - 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:1540
    - - 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:400

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:2800

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