remcos | a1f9dccf3bf17ca1e478456d6deae103abb5b4d09855aa043546376d25313b84

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"	INV20242205.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	INV20242205.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\INV20242205.exe = "0"	INV20242205.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
2392	powershell.exe

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	INV20242205.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	INV20242205.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\INV20242205.exe = "0"	INV20242205.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	INV20242205.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	INV20242205.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2720 set thread context of 3620	2720	INV20242205.exe	82

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2392	powershell.exe
2392	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2392	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3620	wab.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2720 wrote to memory of 2392	2720	INV20242205.exe	77
PID 2720 wrote to memory of 2392	2720	INV20242205.exe	77
PID 2720 wrote to memory of 644	2720	INV20242205.exe	79
PID 2720 wrote to memory of 644	2720	INV20242205.exe	79
PID 2720 wrote to memory of 644	2720	INV20242205.exe	79
PID 2720 wrote to memory of 1108	2720	INV20242205.exe	80
PID 2720 wrote to memory of 1108	2720	INV20242205.exe	80
PID 2720 wrote to memory of 1108	2720	INV20242205.exe	80
PID 2720 wrote to memory of 1108	2720	INV20242205.exe	80
PID 2720 wrote to memory of 1108	2720	INV20242205.exe	80
PID 2720 wrote to memory of 1108	2720	INV20242205.exe	80
PID 2720 wrote to memory of 1108	2720	INV20242205.exe	80
PID 2720 wrote to memory of 1108	2720	INV20242205.exe	80
PID 2720 wrote to memory of 1108	2720	INV20242205.exe	80
PID 2720 wrote to memory of 1108	2720	INV20242205.exe	80
PID 2720 wrote to memory of 4824	2720	INV20242205.exe	81
PID 2720 wrote to memory of 4824	2720	INV20242205.exe	81
PID 2720 wrote to memory of 4824	2720	INV20242205.exe	81
PID 2720 wrote to memory of 4824	2720	INV20242205.exe	81
PID 2720 wrote to memory of 4824	2720	INV20242205.exe	81
PID 2720 wrote to memory of 4824	2720	INV20242205.exe	81
PID 2720 wrote to memory of 4824	2720	INV20242205.exe	81
PID 2720 wrote to memory of 4824	2720	INV20242205.exe	81
PID 2720 wrote to memory of 4824	2720	INV20242205.exe	81
PID 2720 wrote to memory of 4824	2720	INV20242205.exe	81
PID 2720 wrote to memory of 3620	2720	INV20242205.exe	82
PID 2720 wrote to memory of 3620	2720	INV20242205.exe	82
PID 2720 wrote to memory of 3620	2720	INV20242205.exe	82
PID 2720 wrote to memory of 3620	2720	INV20242205.exe	82
PID 2720 wrote to memory of 3620	2720	INV20242205.exe	82
PID 2720 wrote to memory of 3620	2720	INV20242205.exe	82
PID 2720 wrote to memory of 3620	2720	INV20242205.exe	82
PID 2720 wrote to memory of 3620	2720	INV20242205.exe	82
PID 2720 wrote to memory of 3620	2720	INV20242205.exe	82
PID 2720 wrote to memory of 3620	2720	INV20242205.exe	82
PID 2720 wrote to memory of 3620	2720	INV20242205.exe	82
PID 2720 wrote to memory of 3620	2720	INV20242205.exe	82
PID 2720 wrote to memory of 3888	2720	INV20242205.exe	83
PID 2720 wrote to memory of 3888	2720	INV20242205.exe	83
PID 2720 wrote to memory of 3888	2720	INV20242205.exe	83

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"	INV20242205.exe

C:\Users\Admin\AppData\Local\Temp\INV20242205.exe
"C:\Users\Admin\AppData\Local\Temp\INV20242205.exe"
1⤵
- UAC bypass
- Windows security bypass
- Windows security modification
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2720
- 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\INV20242205.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2392
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe"
  2⤵
  PID:644
- C:\Windows\System32\svchost.exe
  "C:\Windows\System32\svchost.exe"
  2⤵
  PID:1108
- C:\Windows\System32\calc.exe
  "C:\Windows\System32\calc.exe"
  2⤵
  PID:4824
- C:\Program Files (x86)\Windows Mail\wab.exe
  "C:\Program Files (x86)\Windows Mail\wab.exe"
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:3620
- C:\Program Files (x86)\Windows Mail\wab.exe
  "C:\Program Files (x86)\Windows Mail\wab.exe"
  2⤵
  PID:3888

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

T1562

Disable or Modify Tools

Modify Registry