Overview

overview

10

Static

static

10

DCRatB11uild.exe

windows10-2004-x64

10

DCRatB11uild.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    DCRatB11uild.exe
  • Size 3.3MB
  • Sample260822-p399psyzay
  • SHA256 fd669e1388907d25b8039b5ae22804a6b77a96d139c8f8bbff50c15c9968bfa2
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
dcratdiscoveryexecutioninfostealerpersistencerat

Malware Config

Targets

    • Target
      DCRatB11uild.exe
    • Size 3.3MB
    • SHA256 fd669e1388907d25b8039b5ae22804a6b77a96d139c8f8bbff50c15c9968bfa2
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    discoveryexecutiondcratinfostealerpersistencerat

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

      rat

    • Family: DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

      ratinfostealerdcrat

    • Modifies WinLogon for persistence

      persistence

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Executes a VBScript file via the Windows Script Host.

      execution

    • SmartAssembly .NET packer

      Detects SmartAssembly .NET packer.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2
T1059

Visual Basic

1
T1059.005

Windows Command Shell

1
T1059.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks