remcos | 777c342842ebb22a72ce1d893c4ed78637911578c7b3593893effbc12ef5600f

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"	PO-11880-SP08576-Order-11-2024.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\PO-11880-SP08576-Order-11-2024.exe = "0"	PO-11880-SP08576-Order-11-2024.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	PO-11880-SP08576-Order-11-2024.exe

Detected Nirsoft tools 3 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/3468-39-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4964-41-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3348-40-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4964-41-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3348-40-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

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
2196	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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	PO-11880-SP08576-Order-11-2024.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	PO-11880-SP08576-Order-11-2024.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	PO-11880-SP08576-Order-11-2024.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\PO-11880-SP08576-Order-11-2024.exe = "0"	PO-11880-SP08576-Order-11-2024.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	wmplayer.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	PO-11880-SP08576-Order-11-2024.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	PO-11880-SP08576-Order-11-2024.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3920 set thread context of 4992	3920	PO-11880-SP08576-Order-11-2024.exe	91
PID 4992 set thread context of 3348	4992	wmplayer.exe	100
PID 4992 set thread context of 4964	4992	wmplayer.exe	101
PID 4992 set thread context of 3468	4992	wmplayer.exe	102

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 4 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	wmplayer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmplayer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmplayer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmplayer.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2196	powershell.exe
2196	powershell.exe
3348	wmplayer.exe
3348	wmplayer.exe
3468	wmplayer.exe
3468	wmplayer.exe
3348	wmplayer.exe
3348	wmplayer.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
4992	wmplayer.exe
4992	wmplayer.exe
4992	wmplayer.exe
4992	wmplayer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2196	powershell.exe
Token: SeDebugPrivilege	3468	wmplayer.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3920 wrote to memory of 2196	3920	PO-11880-SP08576-Order-11-2024.exe	89
PID 3920 wrote to memory of 2196	3920	PO-11880-SP08576-Order-11-2024.exe	89
PID 3920 wrote to memory of 4992	3920	PO-11880-SP08576-Order-11-2024.exe	91
PID 3920 wrote to memory of 4992	3920	PO-11880-SP08576-Order-11-2024.exe	91
PID 3920 wrote to memory of 4992	3920	PO-11880-SP08576-Order-11-2024.exe	91
PID 3920 wrote to memory of 4992	3920	PO-11880-SP08576-Order-11-2024.exe	91
PID 3920 wrote to memory of 4992	3920	PO-11880-SP08576-Order-11-2024.exe	91
PID 3920 wrote to memory of 4992	3920	PO-11880-SP08576-Order-11-2024.exe	91
PID 3920 wrote to memory of 4992	3920	PO-11880-SP08576-Order-11-2024.exe	91
PID 3920 wrote to memory of 4992	3920	PO-11880-SP08576-Order-11-2024.exe	91
PID 3920 wrote to memory of 4992	3920	PO-11880-SP08576-Order-11-2024.exe	91
PID 3920 wrote to memory of 4992	3920	PO-11880-SP08576-Order-11-2024.exe	91
PID 3920 wrote to memory of 2996	3920	PO-11880-SP08576-Order-11-2024.exe	92
PID 3920 wrote to memory of 2996	3920	PO-11880-SP08576-Order-11-2024.exe	92
PID 3920 wrote to memory of 2996	3920	PO-11880-SP08576-Order-11-2024.exe	92
PID 4992 wrote to memory of 4524	4992	wmplayer.exe	99
PID 4992 wrote to memory of 4524	4992	wmplayer.exe	99
PID 4992 wrote to memory of 4524	4992	wmplayer.exe	99
PID 4992 wrote to memory of 3348	4992	wmplayer.exe	100
PID 4992 wrote to memory of 3348	4992	wmplayer.exe	100
PID 4992 wrote to memory of 3348	4992	wmplayer.exe	100
PID 4992 wrote to memory of 3348	4992	wmplayer.exe	100
PID 4992 wrote to memory of 4964	4992	wmplayer.exe	101
PID 4992 wrote to memory of 4964	4992	wmplayer.exe	101
PID 4992 wrote to memory of 4964	4992	wmplayer.exe	101
PID 4992 wrote to memory of 4964	4992	wmplayer.exe	101
PID 4992 wrote to memory of 3468	4992	wmplayer.exe	102
PID 4992 wrote to memory of 3468	4992	wmplayer.exe	102
PID 4992 wrote to memory of 3468	4992	wmplayer.exe	102
PID 4992 wrote to memory of 3468	4992	wmplayer.exe	102

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"	PO-11880-SP08576-Order-11-2024.exe

C:\Users\Admin\AppData\Local\Temp\PO-11880-SP08576-Order-11-2024.exe
"C:\Users\Admin\AppData\Local\Temp\PO-11880-SP08576-Order-11-2024.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:3920
- 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\PO-11880-SP08576-Order-11-2024.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2196
- C:\Program Files (x86)\Windows Media Player\wmplayer.exe
  "C:\Program Files (x86)\Windows Media Player\wmplayer.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4992
- - C:\Program Files (x86)\Windows Media Player\wmplayer.exe
    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\vgzxllwgbebbndk"
    3⤵
    PID:4524
- - C:\Program Files (x86)\Windows Media Player\wmplayer.exe
    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\vgzxllwgbebbndk"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:3348
- - C:\Program Files (x86)\Windows Media Player\wmplayer.exe
    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\famhmdhixmtgqrgtvw"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:4964
- - C:\Program Files (x86)\Windows Media Player\wmplayer.exe
    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\icsamwsblulkaxuxehdvq"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3468
- C:\Program Files (x86)\Windows Media Player\wmplayer.exe
  "C:\Program Files (x86)\Windows Media Player\wmplayer.exe"
  2⤵
  PID:2996

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