remcos | 0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396

Bypass User Account Control

T1548.002

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe = "0"	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 1 IoCs

resource	yara_rule
behavioral2/memory/876-18-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

Detects executables packed with or use KoiVM 1 IoCs

resource	yara_rule
behavioral2/memory/3412-4-0x0000016CE2B30000-0x0000016CE2C02000-memory.dmp	INDICATOR_EXE_Packed_KoiVM

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
2116	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Windows security modification 2 TTPs 3 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe = "0"	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3412 set thread context of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1920	876	WerFault.exe	100

Runs regedit.exe 1 IoCs

pid	Process
2944	regedit.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2116	powershell.exe
2116	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2116	powershell.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3412 wrote to memory of 2116	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	96
PID 3412 wrote to memory of 2116	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	96
PID 3412 wrote to memory of 2944	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	98
PID 3412 wrote to memory of 2944	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	98
PID 3412 wrote to memory of 2944	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	98
PID 3412 wrote to memory of 2944	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	98
PID 3412 wrote to memory of 2944	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	98
PID 3412 wrote to memory of 2944	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	98
PID 3412 wrote to memory of 2944	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	98
PID 3412 wrote to memory of 2944	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	98
PID 3412 wrote to memory of 2944	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	98
PID 3412 wrote to memory of 2944	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	98
PID 3412 wrote to memory of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100
PID 3412 wrote to memory of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100
PID 3412 wrote to memory of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100
PID 3412 wrote to memory of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100
PID 3412 wrote to memory of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100
PID 3412 wrote to memory of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100
PID 3412 wrote to memory of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100
PID 3412 wrote to memory of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100
PID 3412 wrote to memory of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100
PID 3412 wrote to memory of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100
PID 3412 wrote to memory of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100
PID 3412 wrote to memory of 876	3412	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe	100

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"	0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe

C:\Users\Admin\AppData\Local\Temp\0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe
"C:\Users\Admin\AppData\Local\Temp\0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe"
1⤵
- UAC bypass
- Windows security bypass
- Checks computer location settings
- Windows security modification
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
PID:3412
- 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\0c31fc86850da72595f728c90d79881a5e8e8c80369bd5e9e4a16f73f6c15396.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2116
- C:\Windows\regedit.exe
  "C:\Windows\regedit.exe"
  2⤵
  - Runs regedit.exe
  PID:2944
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  PID:876
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 876 -s 16
    3⤵
    - Program crash
    PID:1920

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 876 -ip 876
1⤵
PID:1368

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scripting

T1064

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

T1562

Disable or Modify Tools

Modify Registry