remcos | f5277278370d2ba066b6c402183d0c4204a6367a6f92ef261e18b1c40484b92c

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	winmap.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	svchost.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\winmap = "\"C:\\Users\\Admin\\AppData\\Roaming\\winmap\\winmap.exe\""	winmap.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\winmap = "\"C:\\Users\\Admin\\AppData\\Roaming\\winmap\\winmap.exe\""	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	winmap.exe

Checks BIOS information in registry 2 TTPs 6 IoCs

BIOS 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\SystemBiosVersion	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	winmap.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	winmap.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	svchost.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	WScript.exe

Deletes itself 1 IoCs

pid	Process
4324	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
3896	winmap.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winmap = "\"C:\\Users\\Admin\\AppData\\Roaming\\winmap\\winmap.exe\""	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\winmap = "\"C:\\Users\\Admin\\AppData\\Roaming\\winmap\\winmap.exe\""	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winmap = "\"C:\\Users\\Admin\\AppData\\Roaming\\winmap\\winmap.exe\""	winmap.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\winmap = "\"C:\\Users\\Admin\\AppData\\Roaming\\winmap\\winmap.exe\""	winmap.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	winmap.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs

pid	Process
544	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
3896	winmap.exe
3652	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3896 set thread context of 3652	3896	winmap.exe	91

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 5 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	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.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	winmap.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000_Classes\Local Settings	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
544	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
544	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
3896	winmap.exe
3896	winmap.exe
3652	svchost.exe
3652	svchost.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 544 wrote to memory of 4324	544	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe	87
PID 544 wrote to memory of 4324	544	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe	87
PID 544 wrote to memory of 4324	544	499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe	87
PID 4324 wrote to memory of 4988	4324	WScript.exe	88
PID 4324 wrote to memory of 4988	4324	WScript.exe	88
PID 4324 wrote to memory of 4988	4324	WScript.exe	88
PID 4988 wrote to memory of 3896	4988	cmd.exe	90
PID 4988 wrote to memory of 3896	4988	cmd.exe	90
PID 4988 wrote to memory of 3896	4988	cmd.exe	90
PID 3896 wrote to memory of 3652	3896	winmap.exe	91
PID 3896 wrote to memory of 3652	3896	winmap.exe	91
PID 3896 wrote to memory of 3652	3896	winmap.exe	91
PID 3896 wrote to memory of 3652	3896	winmap.exe	91
PID 3896 wrote to memory of 3652	3896	winmap.exe	91
PID 3896 wrote to memory of 3652	3896	winmap.exe	91
PID 3896 wrote to memory of 3652	3896	winmap.exe	91
PID 3896 wrote to memory of 3652	3896	winmap.exe	91
PID 3896 wrote to memory of 3652	3896	winmap.exe	91

C:\Users\Admin\AppData\Local\Temp\499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe
"C:\Users\Admin\AppData\Local\Temp\499a3eb429ceb358c7a3433fb11bee99f32f0c443444eb0001e405da42c75c30.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Adds policy Run key to start application
- Checks BIOS information in registry
- Checks computer location settings
- Adds Run key to start application
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:544
- 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:4324
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\winmap\winmap.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4988
  - - C:\Users\Admin\AppData\Roaming\winmap\winmap.exe
      C:\Users\Admin\AppData\Roaming\winmap\winmap.exe
      4⤵
      Identifies VirtualBox via ACPI registry values (likely anti-VM)
      Adds policy Run key to start application
      Checks BIOS information in registry
      Executes dropped EXE
      Adds Run key to start application
      Checks whether UAC is enabled
      Suspicious use of NtSetInformationThreadHideFromDebugger
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:3896
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        5⤵
        Identifies VirtualBox via ACPI registry values (likely anti-VM)
        Checks BIOS information in registry
        Suspicious use of NtSetInformationThreadHideFromDebugger
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        
        PID:3652

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

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Defense Evasion

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

System Information Discovery