remcos | 4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a

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"	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.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	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe = "0"	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.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
1268	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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.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	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe = "0"	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.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	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4884 set thread context of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89

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
1268	powershell.exe
1268	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4520	csc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe
Token: SeDebugPrivilege	1268	powershell.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4884 wrote to memory of 1268	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	87
PID 4884 wrote to memory of 1268	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	87
PID 4884 wrote to memory of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89
PID 4884 wrote to memory of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89
PID 4884 wrote to memory of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89
PID 4884 wrote to memory of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89
PID 4884 wrote to memory of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89
PID 4884 wrote to memory of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89
PID 4884 wrote to memory of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89
PID 4884 wrote to memory of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89
PID 4884 wrote to memory of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89
PID 4884 wrote to memory of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89
PID 4884 wrote to memory of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89
PID 4884 wrote to memory of 4520	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	89
PID 4884 wrote to memory of 1996	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	90
PID 4884 wrote to memory of 1996	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	90
PID 4884 wrote to memory of 1996	4884	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe	90

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"	4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe

C:\Users\Admin\AppData\Local\Temp\4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe
"C:\Users\Admin\AppData\Local\Temp\4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.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 AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:4884
- 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\4dd999541cc08d5040453656aa214c147f2021a00a1bdded8f7dfb9a699c6a6a.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1268
- 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 behavior: GetForegroundWindowSpam
  PID:4520
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
  2⤵
  PID:1996

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

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

3

T1082

System Location Discovery

T1614

System Language Discovery