remcos | 871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2278412438-3475196406-3686434223-1000\Control Panel\International\Geo\Nation	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2278412438-3475196406-3686434223-1000\Control Panel\International\Geo\Nation	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2278412438-3475196406-3686434223-1000\Control Panel\International\Geo\Nation	Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2278412438-3475196406-3686434223-1000\Control Panel\International\Geo\Nation	Synaptics.exe

Executes dropped EXE 4 IoCs

pid	Process
1564	._cache_871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
2020	Synaptics.exe
4840	Synaptics.exe
2680	._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"	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 468 set thread context of 1076	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	93
PID 2020 set thread context of 4840	2020	Synaptics.exe	105

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	Synaptics.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	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	._cache_871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.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
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	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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\	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.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
3612	schtasks.exe
4664	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3064	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
3324	powershell.exe
3240	powershell.exe
468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
3240	powershell.exe
468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
3324	powershell.exe
2020	Synaptics.exe
2020	Synaptics.exe
2020	Synaptics.exe
2020	Synaptics.exe
2836	powershell.exe
4808	powershell.exe
2020	Synaptics.exe
4808	powershell.exe
2836	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
Token: SeDebugPrivilege	3324	powershell.exe
Token: SeDebugPrivilege	3240	powershell.exe
Token: SeDebugPrivilege	2020	Synaptics.exe
Token: SeDebugPrivilege	4808	powershell.exe
Token: SeDebugPrivilege	2836	powershell.exe

Suspicious use of SetWindowsHookEx 9 IoCs

pid	Process
1564	._cache_871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
3064	EXCEL.EXE
3064	EXCEL.EXE
3064	EXCEL.EXE
3064	EXCEL.EXE
3064	EXCEL.EXE
3064	EXCEL.EXE
3064	EXCEL.EXE
3064	EXCEL.EXE

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 468 wrote to memory of 3324	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	86
PID 468 wrote to memory of 3324	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	86
PID 468 wrote to memory of 3324	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	86
PID 468 wrote to memory of 3240	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	88
PID 468 wrote to memory of 3240	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	88
PID 468 wrote to memory of 3240	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	88
PID 468 wrote to memory of 3612	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	90
PID 468 wrote to memory of 3612	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	90
PID 468 wrote to memory of 3612	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	90
PID 468 wrote to memory of 984	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	92
PID 468 wrote to memory of 984	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	92
PID 468 wrote to memory of 984	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	92
PID 468 wrote to memory of 1076	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	93
PID 468 wrote to memory of 1076	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	93
PID 468 wrote to memory of 1076	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	93
PID 468 wrote to memory of 1076	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	93
PID 468 wrote to memory of 1076	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	93
PID 468 wrote to memory of 1076	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	93
PID 468 wrote to memory of 1076	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	93
PID 468 wrote to memory of 1076	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	93
PID 468 wrote to memory of 1076	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	93
PID 468 wrote to memory of 1076	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	93
PID 468 wrote to memory of 1076	468	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	93
PID 1076 wrote to memory of 1564	1076	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	94
PID 1076 wrote to memory of 1564	1076	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	94
PID 1076 wrote to memory of 1564	1076	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	94
PID 1076 wrote to memory of 2020	1076	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	95
PID 1076 wrote to memory of 2020	1076	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	95
PID 1076 wrote to memory of 2020	1076	871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe	95
PID 2020 wrote to memory of 4808	2020	Synaptics.exe	99
PID 2020 wrote to memory of 4808	2020	Synaptics.exe	99
PID 2020 wrote to memory of 4808	2020	Synaptics.exe	99
PID 2020 wrote to memory of 2836	2020	Synaptics.exe	101
PID 2020 wrote to memory of 2836	2020	Synaptics.exe	101
PID 2020 wrote to memory of 2836	2020	Synaptics.exe	101
PID 2020 wrote to memory of 4664	2020	Synaptics.exe	103
PID 2020 wrote to memory of 4664	2020	Synaptics.exe	103
PID 2020 wrote to memory of 4664	2020	Synaptics.exe	103
PID 2020 wrote to memory of 4840	2020	Synaptics.exe	105
PID 2020 wrote to memory of 4840	2020	Synaptics.exe	105
PID 2020 wrote to memory of 4840	2020	Synaptics.exe	105
PID 2020 wrote to memory of 4840	2020	Synaptics.exe	105
PID 2020 wrote to memory of 4840	2020	Synaptics.exe	105
PID 2020 wrote to memory of 4840	2020	Synaptics.exe	105
PID 2020 wrote to memory of 4840	2020	Synaptics.exe	105
PID 2020 wrote to memory of 4840	2020	Synaptics.exe	105
PID 2020 wrote to memory of 4840	2020	Synaptics.exe	105
PID 2020 wrote to memory of 4840	2020	Synaptics.exe	105
PID 2020 wrote to memory of 4840	2020	Synaptics.exe	105
PID 4840 wrote to memory of 2680	4840	Synaptics.exe	106
PID 4840 wrote to memory of 2680	4840	Synaptics.exe	106
PID 4840 wrote to memory of 2680	4840	Synaptics.exe	106

C:\Users\Admin\AppData\Local\Temp\871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
"C:\Users\Admin\AppData\Local\Temp\871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.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:468
- 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\871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3324
- 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:3240
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BLznCuyzwk" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC8ED.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3612
- C:\Users\Admin\AppData\Local\Temp\871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
  "C:\Users\Admin\AppData\Local\Temp\871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe"
  2⤵
  PID:984
- C:\Users\Admin\AppData\Local\Temp\871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
  "C:\Users\Admin\AppData\Local\Temp\871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.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:1076
- - C:\Users\Admin\AppData\Local\Temp\._cache_871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe
    "C:\Users\Admin\AppData\Local\Temp\._cache_871287a31efe88db587b63f1b4fa92fae14cc63c8146c48e0492e46530e00951.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:1564
- - 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:2020
  - - 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:4808
  - - 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:2836
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BLznCuyzwk" /XML "C:\Users\Admin\AppData\Local\Temp\tmp270B.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:4664
  - - 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:4840
    - - 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:2680

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:3064

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