Overview

overview

10

Static

static

10

DCRatBuild.exe

windows7-x64

10

DCRatBuild.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    DCRatBuild.exe

  • Size

    1.2MB

  • Sample

    250116-t8c9dayrat

  • MD5

    1c4d40bb27938ee8ccbe1b09a8a76ba6

  • SHA1

    dc2266dc5b7b265221c7c9315267067c8fe76d92

  • SHA256

    ee930b7c7d01783de8fb24c9f40924a4e9da49033951a450c63d046f2a2ce3ee

  • SHA512

    7cb63784b5eeaf73941c2f425d3bcdea4200510929f2e9ba4ff4e6c3983e61fc4514d3a66a5405b8b1c052d07a8cd9784693a4ed26a0656c7d6b7b80121d1daa

  • SSDEEP

    24576:GTbBv5rU8/38TnIPZKN9OJMA+53iE0n3g6s:4BtMTnIPkNomA+53KO

Score
10/10
dcratdiscoveryevasioninfostealerpersistenceratspywarestealer

Malware Config

Targets

    • Target

      DCRatBuild.exe

    • Size

      1.2MB

    • MD5

      1c4d40bb27938ee8ccbe1b09a8a76ba6

    • SHA1

      dc2266dc5b7b265221c7c9315267067c8fe76d92

    • SHA256

      ee930b7c7d01783de8fb24c9f40924a4e9da49033951a450c63d046f2a2ce3ee

    • SHA512

      7cb63784b5eeaf73941c2f425d3bcdea4200510929f2e9ba4ff4e6c3983e61fc4514d3a66a5405b8b1c052d07a8cd9784693a4ed26a0656c7d6b7b80121d1daa

    • SSDEEP

      24576:GTbBv5rU8/38TnIPZKN9OJMA+53iE0n3g6s:4BtMTnIPkNomA+53KO

    Score
    10/10
    dcratdiscoveryevasioninfostealerpersistenceratspywarestealer

    • 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

    • 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

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

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

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Tasks

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