Overview

overview

10

Static

static

3

DCRatBuild.exe

windows7-x64

10

DCRatBuild.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    DCRatBuild.exe

  • Size

    1.8MB

  • Sample

    241029-svlg6axncr

  • MD5

    013bc21b187fbf033bdeec699b2263b5

  • SHA1

    78a44777f96bdd338e037fc87c548fe9b6e7f241

  • SHA256

    191d579dcc73daaca18b2442b8411f05d50ad19ea1ba834a0e2c67414edfdaf5

  • SHA512

    332b58b80ed3b88bbaaf59c4b3ab8735af56e6377ed36d8da625fd8c139d5607a7f5de603d85ba155dd78fdaca46e3a456693afd32b5cb1d88567e765a35abf0

  • SSDEEP

    24576:2TbBv5rUyXVuTutB3BpIRgMS/JiVQZph3Ute6XjQ+O34nNRB2PfC0xOhAjKEge1o:IBJuTu3ERX2Ysh30Ep34NKTxOWjKECd

Score
10/10
dcratdiscoveryevasionexecutioninfostealerpersistenceratspywarestealer

Malware Config

Targets

    • Target

      DCRatBuild.exe

    • Size

      1.8MB

    • MD5

      013bc21b187fbf033bdeec699b2263b5

    • SHA1

      78a44777f96bdd338e037fc87c548fe9b6e7f241

    • SHA256

      191d579dcc73daaca18b2442b8411f05d50ad19ea1ba834a0e2c67414edfdaf5

    • SHA512

      332b58b80ed3b88bbaaf59c4b3ab8735af56e6377ed36d8da625fd8c139d5607a7f5de603d85ba155dd78fdaca46e3a456693afd32b5cb1d88567e765a35abf0

    • SSDEEP

      24576:2TbBv5rUyXVuTutB3BpIRgMS/JiVQZph3Ute6XjQ+O34nNRB2PfC0xOhAjKEge1o:IBJuTu3ERX2Ysh30Ep34NKTxOWjKECd

    Score
    10/10
    dcratdiscoveryevasionexecutioninfostealerpersistenceratspywarestealer

    • 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

    • 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

    • 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

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

System Information Discovery

2
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