Overview

overview

10

Static

static

10

4b1967b040...05.exe

windows7-x64

10

4b1967b040...05.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    4b1967b04039c9b7a23651043b38c895cca2eb560de30a960368f82549079605.exe
  • Size 855KB
  • Sample241104-csbl6s1cmd
  • SHA256 4b1967b04039c9b7a23651043b38c895cca2eb560de30a960368f82549079605
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
dcratdiscoveryinfostealerpersistenceratspywarestealer

Malware Config

Targets

    • Target
      4b1967b04039c9b7a23651043b38c895cca2eb560de30a960368f82549079605.exe
    • Size 855KB
    • SHA256 4b1967b04039c9b7a23651043b38c895cca2eb560de30a960368f82549079605
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    dcratinfostealerpersistenceratspywarestealerdiscovery

    • DcRat

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

      ratinfostealerdcrat

    • Dcrat family

      dcrat

    • 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

      rat

    • Checks computer location settings

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

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer

    • 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

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

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

2
T1012

Remote System Discovery

1
T1018

System Information Discovery

2
T1082

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Tasks