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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\INV20242205.exe = "0"	INV20242205.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	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
1920	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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	INV20242205.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 1768 set thread context of 2920	1768	INV20242205.exe	112

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
1664	2920	WerFault.exe	112

Runs regedit.exe 1 IoCs

pid	Process
4988	regedit.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1920	powershell.exe
1920	powershell.exe
1920	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1920	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1768 wrote to memory of 1920	1768	INV20242205.exe	100
PID 1768 wrote to memory of 1920	1768	INV20242205.exe	100
PID 1768 wrote to memory of 4528	1768	INV20242205.exe	101
PID 1768 wrote to memory of 4528	1768	INV20242205.exe	101
PID 1768 wrote to memory of 4528	1768	INV20242205.exe	101
PID 1768 wrote to memory of 3140	1768	INV20242205.exe	104
PID 1768 wrote to memory of 3140	1768	INV20242205.exe	104
PID 1768 wrote to memory of 3140	1768	INV20242205.exe	104
PID 1768 wrote to memory of 3140	1768	INV20242205.exe	104
PID 1768 wrote to memory of 3140	1768	INV20242205.exe	104
PID 1768 wrote to memory of 3140	1768	INV20242205.exe	104
PID 1768 wrote to memory of 3140	1768	INV20242205.exe	104
PID 1768 wrote to memory of 3140	1768	INV20242205.exe	104
PID 1768 wrote to memory of 3140	1768	INV20242205.exe	104
PID 1768 wrote to memory of 3140	1768	INV20242205.exe	104
PID 1768 wrote to memory of 3648	1768	INV20242205.exe	105
PID 1768 wrote to memory of 3648	1768	INV20242205.exe	105
PID 1768 wrote to memory of 3648	1768	INV20242205.exe	105
PID 1768 wrote to memory of 5040	1768	INV20242205.exe	106
PID 1768 wrote to memory of 5040	1768	INV20242205.exe	106
PID 1768 wrote to memory of 5040	1768	INV20242205.exe	106
PID 1768 wrote to memory of 5040	1768	INV20242205.exe	106
PID 1768 wrote to memory of 5040	1768	INV20242205.exe	106
PID 1768 wrote to memory of 5040	1768	INV20242205.exe	106
PID 1768 wrote to memory of 5040	1768	INV20242205.exe	106
PID 1768 wrote to memory of 5040	1768	INV20242205.exe	106
PID 1768 wrote to memory of 5040	1768	INV20242205.exe	106
PID 1768 wrote to memory of 5040	1768	INV20242205.exe	106
PID 1768 wrote to memory of 4988	1768	INV20242205.exe	108
PID 1768 wrote to memory of 4988	1768	INV20242205.exe	108
PID 1768 wrote to memory of 4988	1768	INV20242205.exe	108
PID 1768 wrote to memory of 4988	1768	INV20242205.exe	108
PID 1768 wrote to memory of 4988	1768	INV20242205.exe	108
PID 1768 wrote to memory of 4988	1768	INV20242205.exe	108
PID 1768 wrote to memory of 4988	1768	INV20242205.exe	108
PID 1768 wrote to memory of 4988	1768	INV20242205.exe	108
PID 1768 wrote to memory of 4988	1768	INV20242205.exe	108
PID 1768 wrote to memory of 4988	1768	INV20242205.exe	108
PID 1768 wrote to memory of 2572	1768	INV20242205.exe	109
PID 1768 wrote to memory of 2572	1768	INV20242205.exe	109
PID 1768 wrote to memory of 2572	1768	INV20242205.exe	109
PID 1768 wrote to memory of 4344	1768	INV20242205.exe	110
PID 1768 wrote to memory of 4344	1768	INV20242205.exe	110
PID 1768 wrote to memory of 4344	1768	INV20242205.exe	110
PID 1768 wrote to memory of 4344	1768	INV20242205.exe	110
PID 1768 wrote to memory of 4344	1768	INV20242205.exe	110
PID 1768 wrote to memory of 4344	1768	INV20242205.exe	110
PID 1768 wrote to memory of 4344	1768	INV20242205.exe	110
PID 1768 wrote to memory of 4344	1768	INV20242205.exe	110
PID 1768 wrote to memory of 4344	1768	INV20242205.exe	110
PID 1768 wrote to memory of 4344	1768	INV20242205.exe	110
PID 1768 wrote to memory of 4512	1768	INV20242205.exe	111
PID 1768 wrote to memory of 4512	1768	INV20242205.exe	111
PID 1768 wrote to memory of 4512	1768	INV20242205.exe	111
PID 1768 wrote to memory of 4512	1768	INV20242205.exe	111
PID 1768 wrote to memory of 4512	1768	INV20242205.exe	111
PID 1768 wrote to memory of 4512	1768	INV20242205.exe	111
PID 1768 wrote to memory of 4512	1768	INV20242205.exe	111
PID 1768 wrote to memory of 4512	1768	INV20242205.exe	111
PID 1768 wrote to memory of 4512	1768	INV20242205.exe	111
PID 1768 wrote to memory of 4512	1768	INV20242205.exe	111
PID 1768 wrote to memory of 2920	1768	INV20242205.exe	112
PID 1768 wrote to memory of 2920	1768	INV20242205.exe	112
PID 1768 wrote to memory of 2920	1768	INV20242205.exe	112

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
- Checks computer location settings
- Windows security modification
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1768
- 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:1920
- C:\Program Files (x86)\Windows Media Player\wmplayer.exe
  "C:\Program Files (x86)\Windows Media Player\wmplayer.exe"
  2⤵
  PID:4528
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe"
  2⤵
  PID:3140
- C:\Program Files (x86)\Windows Mail\wab.exe
  "C:\Program Files (x86)\Windows Mail\wab.exe"
  2⤵
  PID:3648
- C:\Windows\System32\notepad.exe
  "C:\Windows\System32\notepad.exe"
  2⤵
  PID:5040
- C:\Windows\regedit.exe
  "C:\Windows\regedit.exe"
  2⤵
  - Runs regedit.exe
  PID:4988
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe"
  2⤵
  PID:2572
- C:\Windows\System32\svchost.exe
  "C:\Windows\System32\svchost.exe"
  2⤵
  PID:4344
- C:\Windows\System32\calc.exe
  "C:\Windows\System32\calc.exe"
  2⤵
  PID:4512
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe"
  2⤵
  PID:2920
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2920 -s 12
    3⤵
    - Program crash
    PID:1664
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe"
  2⤵
  PID:4328

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4404,i,16710585221322798697,8586257254049248207,262144 --variations-seed-version --mojo-platform-channel-handle=4604 /prefetch:8
1⤵
PID:636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 2920 -ip 2920
1⤵
PID:4936

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