Overview

overview

10

Static

static

10

4A3BF58E23...67.exe

windows7-x64

10

4A3BF58E23...67.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    4A3BF58E23A86EA73D2F1D8BA04E7467.exe
  • Size 518KB
  • Sample241024-n33desveja
  • SHA256 ba30eaf70b11268accb528ce65cea53a3ec811d2e368e4a3d19ebdfaf02cc233
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
dcratexecutioninfostealerpersistencerat

Malware Config

Targets

    • Target
      4A3BF58E23A86EA73D2F1D8BA04E7467.exe
    • Size 518KB
    • SHA256 ba30eaf70b11268accb528ce65cea53a3ec811d2e368e4a3d19ebdfaf02cc233
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    dcratexecutioninfostealerpersistencerat

    • 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.

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

      rat

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

      execution

    • Checks computer location settings

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

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

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

3
T1112

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks