remcos | b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe = "0"	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe

Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4240	powershell.exe

Looks for VMWare Tools registry key 2 TTPs 1 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe

Checks BIOS information in registry 2 TTPs 2 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	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe

Windows security modification 2 TTPs 3 IoCs

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe = "0"	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4856 set thread context of 944	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	93

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 1 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	csc.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4240	powershell.exe
4240	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe
Token: SeDebugPrivilege	4240	powershell.exe
Token: 33	3976	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	3976	AUDIODG.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
944	csc.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
944	csc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
944	csc.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4856 wrote to memory of 4240	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	88
PID 4856 wrote to memory of 4240	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	88
PID 4856 wrote to memory of 4940	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	89
PID 4856 wrote to memory of 4940	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	89
PID 4856 wrote to memory of 4940	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	89
PID 4856 wrote to memory of 3504	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	92
PID 4856 wrote to memory of 3504	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	92
PID 4856 wrote to memory of 3504	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	92
PID 4856 wrote to memory of 3504	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	92
PID 4856 wrote to memory of 3504	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	92
PID 4856 wrote to memory of 3504	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	92
PID 4856 wrote to memory of 3504	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	92
PID 4856 wrote to memory of 3504	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	92
PID 4856 wrote to memory of 944	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	93
PID 4856 wrote to memory of 944	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	93
PID 4856 wrote to memory of 944	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	93
PID 4856 wrote to memory of 944	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	93
PID 4856 wrote to memory of 944	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	93
PID 4856 wrote to memory of 944	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	93
PID 4856 wrote to memory of 944	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	93
PID 4856 wrote to memory of 944	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	93
PID 4856 wrote to memory of 944	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	93
PID 4856 wrote to memory of 944	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	93
PID 4856 wrote to memory of 2124	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	94
PID 4856 wrote to memory of 2124	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	94
PID 4856 wrote to memory of 2124	4856	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe	94

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe

C:\Users\Admin\AppData\Local\Temp\b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe
"C:\Users\Admin\AppData\Local\Temp\b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe"
1⤵
- UAC bypass
- Windows security bypass
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Checks computer location settings
- Windows security modification
- Checks whether UAC is enabled
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:4856
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4240
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe"
  2⤵
  PID:4940
- C:\Windows\System32\calc.exe
  "C:\Windows\System32\calc.exe"
  2⤵
  PID:3504
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:944
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
  2⤵
  PID:2124

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x414 0x4e8
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3976

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

3

T1562

Disable or Modify Tools

Modify Registry

Virtualization/Sandbox Evasion

2

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

5

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

2