Overview

overview

10

Static

static

10

DCRatBuild.exe

windows10-ltsc 2021-x64

10

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General

  • Target

    DCRatBuild.exe

  • Size

    3.1MB

  • Sample

    241103-ajxryaypas

  • MD5

    8f648fc108316e4b8ff2ce7cfb010834

  • SHA1

    1f5ce63997b036dd7b192eedb67fa92d16737484

  • SHA256

    47efd687dcfd8b5db64bfa28f8d5479bca12c000d2a50d054698055bb4497028

  • SHA512

    a404333c593e9ab0d5b5d969e6a94a6b6cfae9c87e8a6bf971891def42336986df3fcd4f6b489b00f0f75e3a309b496554d5c895b5916ae44580f5b829a4f247

  • SSDEEP

    49152:ubA3jsc787INQ481IA7o/wJZts4rhwxz+UCShrMAbYV5jSa:ubdcg7IrU/ZtZrmz+fArzb+5jSa

Score
10/10
dcratdiscoveryevasionexecutioninfostealerratspywarestealertrojan

Malware Config

Targets

    • Target

      DCRatBuild.exe

    • Size

      3.1MB

    • MD5

      8f648fc108316e4b8ff2ce7cfb010834

    • SHA1

      1f5ce63997b036dd7b192eedb67fa92d16737484

    • SHA256

      47efd687dcfd8b5db64bfa28f8d5479bca12c000d2a50d054698055bb4497028

    • SHA512

      a404333c593e9ab0d5b5d969e6a94a6b6cfae9c87e8a6bf971891def42336986df3fcd4f6b489b00f0f75e3a309b496554d5c895b5916ae44580f5b829a4f247

    • SSDEEP

      49152:ubA3jsc787INQ481IA7o/wJZts4rhwxz+UCShrMAbYV5jSa:ubdcg7IrU/ZtZrmz+fArzb+5jSa

    Score
    10/10
    dcratdiscoveryevasionexecutioninfostealerratspywarestealertrojan

    • DcRat

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

      ratinfostealerdcrat

    • Dcrat family

      dcrat

    • Process spawned unexpected child process

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

    • UAC bypass

      evasiontrojan

    • 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

    • Disables Task Manager via registry modification

      evasion

    • Drops file in Drivers directory

    • 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

    • Checks whether UAC is enabled

      evasiontrojan
    behavioral1

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

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

3
T1112

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

Browser Information Discovery

1
T1217

Query Registry

3
T1012

System Information Discovery

4
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Tasks