Overview

overview

10

Static

static

3

CUROS-App.exe

windows10-2004-x64

10

CUROS-App.exe

windows11-ltsc_2024-x64

3

Sharing

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General

  • Target
    CUROS-App.exe
  • Size 50.9MB
  • Sample260714-1n2jsset2n
  • SHA256 c1c3bd10ead52c313c17572846ab7b282f305f9b4d434a9726fa446fd05fceee
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defense_evasiondiscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Targets

    • Target
      CUROS-App.exe
    • Size 50.9MB
    • SHA256 c1c3bd10ead52c313c17572846ab7b282f305f9b4d434a9726fa446fd05fceee
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasiondiscoveryevasionexecutionpersistenceprivilege_escalationtrojan

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Modifies Windows Defender DisableAntiSpyware settings

      evasiontrojan

    • Modifies Windows Defender Real-time Protection settings

      defense_evasiontrojan

    • Modifies Windows Defender notification settings

      defense_evasiontrojan

    • Modifies firewall policy service

      defense_evasion

    • Modifies security service

      defense_evasion

    • UAC bypass

      defense_evasiontrojan

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

      defense_evasion

    • Identifies Xen via ACPI registry values (likely anti-VM)

      defense_evasion

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

      execution

    • Disables Task Manager via registry modification

      defense_evasion

    • Disables use of System Restore points

      defense_evasion

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Windows security modification

      defense_evasiontrojan

    • Checks whether UAC is enabled

      defense_evasiontrojan

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Indicator Removal: File Deletion

      Adversaries may delete files left behind by the actions of their intrusion activity.

      defense_evasion

    • Modifies Security services

      Modifies the startup behavior of a security service.

      defense_evasion

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Persistence

Create or Modify System Process

5
T1543

Windows Service

5
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Create or Modify System Process

5
T1543

Windows Service

5
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

File and Directory Permissions Modification

1
T1222

Hide Artifacts

2
T1564

Hidden Files and Directories

1
T1564.001

Ignore Process Interrupts

1
T1564.011

Impair Defenses

8
T1562

Disable or Modify System Firewall

1
T1562.004

Disable or Modify Tools

6
T1562.001

Indicator Removal

1
T1070

File Deletion

1
T1070.004

Modify Registry

10
T1112

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Discovery

Peripheral Device Discovery

1
T1120

Query Registry

7
T1012

System Information Discovery

7
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Virtualization/Sandbox Evasion

2
T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

1
T1490

Tasks