Overview

overview

10

Static

static

3

DCRatBuild.exe

windows7-x64

10

DCRatBuild.exe

windows10-2004-x64

10

Sharing

Copy URL
Twitter E-mail

General

  • Target

    DCRatBuild.exe

  • Size

    3.7MB

  • Sample

    250111-2m3k5svqap

  • MD5

    072756d824448388227ca413cf9b30fb

  • SHA1

    3774a14ae84e955c57a35f82da833d46cea22ed3

  • SHA256

    0043be0527169c370619ab57df3eefb66f7742e90449cfc952489d70fdbca59a

  • SHA512

    2a3953faddf9b6037a0a34499ac11011e4c22d931ba9e4ab174b0ebd7e1c1bade9546a6b970f6280402905159b42bcdc60c92a91e8dd39cd9ff14ddf73638a4d

  • SSDEEP

    98304:yQpUIa1ishqq/x4XR09rQVkREwySMEX+y:xpUIa0KFl9rnRHPZXF

Score
10/10
dcratdiscoveryevasionexecutioninfostealerpersistencerat

Malware Config

Targets

    • Target

      DCRatBuild.exe

    • Size

      3.7MB

    • MD5

      072756d824448388227ca413cf9b30fb

    • SHA1

      3774a14ae84e955c57a35f82da833d46cea22ed3

    • SHA256

      0043be0527169c370619ab57df3eefb66f7742e90449cfc952489d70fdbca59a

    • SHA512

      2a3953faddf9b6037a0a34499ac11011e4c22d931ba9e4ab174b0ebd7e1c1bade9546a6b970f6280402905159b42bcdc60c92a91e8dd39cd9ff14ddf73638a4d

    • SSDEEP

      98304:yQpUIa1ishqq/x4XR09rQVkREwySMEX+y:xpUIa0KFl9rnRHPZXF

    Score
    10/10
    dcratdiscoveryevasionexecutioninfostealerpersistencerat

    • 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.

    • 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

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • 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

Credential Access

Discovery

Query Registry

2
T1012

Remote System Discovery

1
T1018

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks