remcos | 3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe

Executes dropped EXE 6 IoCs

pid	Process
2416	._cache_3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
4728	Synaptics.exe
1016	Synaptics.exe
2620	Synaptics.exe
396	Synaptics.exe
3364	._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"	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1388 set thread context of 4680	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	103
PID 4728 set thread context of 2620	4728	Synaptics.exe	118

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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.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	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	._cache_3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.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	Synaptics.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	._cache_Synaptics.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\	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.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
2488	schtasks.exe
932	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1708	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
4660	powershell.exe
1920	powershell.exe
1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
4660	powershell.exe
1920	powershell.exe
4728	Synaptics.exe
4728	Synaptics.exe
4728	Synaptics.exe
4728	Synaptics.exe
4512	powershell.exe
4248	powershell.exe
4728	Synaptics.exe
4728	Synaptics.exe
4728	Synaptics.exe
4728	Synaptics.exe
4512	powershell.exe
4728	Synaptics.exe
4248	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
Token: SeDebugPrivilege	1920	powershell.exe
Token: SeDebugPrivilege	4660	powershell.exe
Token: SeDebugPrivilege	4728	Synaptics.exe
Token: SeDebugPrivilege	4512	powershell.exe
Token: SeDebugPrivilege	4248	powershell.exe

Suspicious use of SetWindowsHookEx 9 IoCs

pid	Process
2416	._cache_3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
1708	EXCEL.EXE
1708	EXCEL.EXE
1708	EXCEL.EXE
1708	EXCEL.EXE
1708	EXCEL.EXE
1708	EXCEL.EXE
1708	EXCEL.EXE
1708	EXCEL.EXE

Suspicious use of WriteProcessMemory 55 IoCs

description	pid	Process	procid_target
PID 1388 wrote to memory of 1920	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	97
PID 1388 wrote to memory of 1920	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	97
PID 1388 wrote to memory of 1920	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	97
PID 1388 wrote to memory of 4660	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	99
PID 1388 wrote to memory of 4660	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	99
PID 1388 wrote to memory of 4660	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	99
PID 1388 wrote to memory of 2488	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	101
PID 1388 wrote to memory of 2488	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	101
PID 1388 wrote to memory of 2488	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	101
PID 1388 wrote to memory of 4680	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	103
PID 1388 wrote to memory of 4680	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	103
PID 1388 wrote to memory of 4680	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	103
PID 1388 wrote to memory of 4680	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	103
PID 1388 wrote to memory of 4680	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	103
PID 1388 wrote to memory of 4680	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	103
PID 1388 wrote to memory of 4680	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	103
PID 1388 wrote to memory of 4680	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	103
PID 1388 wrote to memory of 4680	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	103
PID 1388 wrote to memory of 4680	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	103
PID 1388 wrote to memory of 4680	1388	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	103
PID 4680 wrote to memory of 2416	4680	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	104
PID 4680 wrote to memory of 2416	4680	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	104
PID 4680 wrote to memory of 2416	4680	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	104
PID 4680 wrote to memory of 4728	4680	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	105
PID 4680 wrote to memory of 4728	4680	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	105
PID 4680 wrote to memory of 4728	4680	3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe	105
PID 4728 wrote to memory of 4512	4728	Synaptics.exe	110
PID 4728 wrote to memory of 4512	4728	Synaptics.exe	110
PID 4728 wrote to memory of 4512	4728	Synaptics.exe	110
PID 4728 wrote to memory of 4248	4728	Synaptics.exe	112
PID 4728 wrote to memory of 4248	4728	Synaptics.exe	112
PID 4728 wrote to memory of 4248	4728	Synaptics.exe	112
PID 4728 wrote to memory of 932	4728	Synaptics.exe	113
PID 4728 wrote to memory of 932	4728	Synaptics.exe	113
PID 4728 wrote to memory of 932	4728	Synaptics.exe	113
PID 4728 wrote to memory of 1016	4728	Synaptics.exe	116
PID 4728 wrote to memory of 1016	4728	Synaptics.exe	116
PID 4728 wrote to memory of 1016	4728	Synaptics.exe	116
PID 4728 wrote to memory of 396	4728	Synaptics.exe	117
PID 4728 wrote to memory of 396	4728	Synaptics.exe	117
PID 4728 wrote to memory of 396	4728	Synaptics.exe	117
PID 4728 wrote to memory of 2620	4728	Synaptics.exe	118
PID 4728 wrote to memory of 2620	4728	Synaptics.exe	118
PID 4728 wrote to memory of 2620	4728	Synaptics.exe	118
PID 4728 wrote to memory of 2620	4728	Synaptics.exe	118
PID 4728 wrote to memory of 2620	4728	Synaptics.exe	118
PID 4728 wrote to memory of 2620	4728	Synaptics.exe	118
PID 4728 wrote to memory of 2620	4728	Synaptics.exe	118
PID 4728 wrote to memory of 2620	4728	Synaptics.exe	118
PID 4728 wrote to memory of 2620	4728	Synaptics.exe	118
PID 4728 wrote to memory of 2620	4728	Synaptics.exe	118
PID 4728 wrote to memory of 2620	4728	Synaptics.exe	118
PID 2620 wrote to memory of 3364	2620	Synaptics.exe	119
PID 2620 wrote to memory of 3364	2620	Synaptics.exe	119
PID 2620 wrote to memory of 3364	2620	Synaptics.exe	119

C:\Users\Admin\AppData\Local\Temp\3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
"C:\Users\Admin\AppData\Local\Temp\3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.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:1388
- 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\3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1920
- 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:4660
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BLznCuyzwk" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF00D.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2488
- C:\Users\Admin\AppData\Local\Temp\3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
  "C:\Users\Admin\AppData\Local\Temp\3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.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:4680
- - C:\Users\Admin\AppData\Local\Temp\._cache_3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe
    "C:\Users\Admin\AppData\Local\Temp\._cache_3b98425cc4732681763f213523a28baa42b54f13782854b735ba086f8d5ce2d7N.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2416
- - 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:4728
  - - 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:4512
  - - 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:4248
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BLznCuyzwk" /XML "C:\Users\Admin\AppData\Local\Temp\tmp51F3.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:932
  - - C:\ProgramData\Synaptics\Synaptics.exe
      "C:\ProgramData\Synaptics\Synaptics.exe"
      4⤵
      Executes dropped EXE
      PID:1016
  - - C:\ProgramData\Synaptics\Synaptics.exe
      "C:\ProgramData\Synaptics\Synaptics.exe"
      4⤵
      Executes dropped EXE
      PID:396
  - - 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:2620
    - - 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:3364

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:1708

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