remcos | 7a422ffa32fcdb0ca5698ef80ea3a7bed96b3fc42e008b0458256f4c680bd395

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"	tmp9vrynm_c.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	tmp9vrynm_c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\tmp9vrynm_c.exe = "0"	tmp9vrynm_c.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
3532	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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	tmp9vrynm_c.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

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	tmp9vrynm_c.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	tmp9vrynm_c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\tmp9vrynm_c.exe = "0"	tmp9vrynm_c.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	tmp9vrynm_c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	tmp9vrynm_c.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3364 set thread context of 4372	3364	tmp9vrynm_c.exe	87

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
3088	4372	WerFault.exe	87

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3532	powershell.exe
3532	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3532	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3364 wrote to memory of 3532	3364	tmp9vrynm_c.exe	86
PID 3364 wrote to memory of 3532	3364	tmp9vrynm_c.exe	86
PID 3364 wrote to memory of 4372	3364	tmp9vrynm_c.exe	87
PID 3364 wrote to memory of 4372	3364	tmp9vrynm_c.exe	87
PID 3364 wrote to memory of 4372	3364	tmp9vrynm_c.exe	87
PID 3364 wrote to memory of 4372	3364	tmp9vrynm_c.exe	87
PID 3364 wrote to memory of 4372	3364	tmp9vrynm_c.exe	87
PID 3364 wrote to memory of 4372	3364	tmp9vrynm_c.exe	87
PID 3364 wrote to memory of 4372	3364	tmp9vrynm_c.exe	87
PID 3364 wrote to memory of 4372	3364	tmp9vrynm_c.exe	87
PID 3364 wrote to memory of 4372	3364	tmp9vrynm_c.exe	87
PID 3364 wrote to memory of 4372	3364	tmp9vrynm_c.exe	87
PID 3364 wrote to memory of 2848	3364	tmp9vrynm_c.exe	89
PID 3364 wrote to memory of 2848	3364	tmp9vrynm_c.exe	89
PID 3364 wrote to memory of 2848	3364	tmp9vrynm_c.exe	89

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"	tmp9vrynm_c.exe

C:\Users\Admin\AppData\Local\Temp\tmp9vrynm_c.exe
"C:\Users\Admin\AppData\Local\Temp\tmp9vrynm_c.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:3364
- 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\tmp9vrynm_c.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3532
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  PID:4372
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4372 -s 12
    3⤵
    - Program crash
    PID:3088
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  PID:2848

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4372 -ip 4372
1⤵
PID:1476

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2

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