Overview

overview

10

Static

static

3

DCRatBuild.exe

windows10-ltsc_2021-x64

10

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General

  • Target

    DCRatBuild.exe

  • Size

    2.1MB

  • Sample

    250328-vmz2pa1jw5

  • MD5

    fa7058193e55dcf22576be1d81ee4ec9

  • SHA1

    7ac5c2aeff7da77ea0ea71e9e4244dec68ee7a18

  • SHA256

    27beae1aeb07d9aa24f6f4f13d247c7f69d8c412ed9150ac0e13c36de80d159a

  • SHA512

    fbb538fa4d26bd3c554f9e837b134c119a6acff43b0a8cc0b805bcb9a0acfa54d4b0ca18d745f7f167ba9bc9642d8e14e783c38ad7207d55389d8ea7dd1af74e

  • SSDEEP

    49152:IBJnuqJN5zhadFAfdQhkGdf8v0d4RHP5Hx7:yxuqVMdFPCgfydRHBHx

Score
10/10
dcratdiscoveryexecutioninfostealerpersistenceratspywarestealer

Malware Config

Targets

    • Target

      DCRatBuild.exe

    • Size

      2.1MB

    • MD5

      fa7058193e55dcf22576be1d81ee4ec9

    • SHA1

      7ac5c2aeff7da77ea0ea71e9e4244dec68ee7a18

    • SHA256

      27beae1aeb07d9aa24f6f4f13d247c7f69d8c412ed9150ac0e13c36de80d159a

    • SHA512

      fbb538fa4d26bd3c554f9e837b134c119a6acff43b0a8cc0b805bcb9a0acfa54d4b0ca18d745f7f167ba9bc9642d8e14e783c38ad7207d55389d8ea7dd1af74e

    • SSDEEP

      49152:IBJnuqJN5zhadFAfdQhkGdf8v0d4RHP5Hx7:yxuqVMdFPCgfydRHBHx

    Score
    10/10
    dcratdiscoveryexecutioninfostealerpersistenceratspywarestealer

    • 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

    • 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

    • Drops file in System32 directory

    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

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

2
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

Peripheral Device Discovery

1
T1120

Query Registry

3
T1012

System Information Discovery

3
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