Overview

overview

10

Static

static

10

EB71BD542C...9E.exe

windows10-2004-x64

10

EB71BD542C...9E.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    EB71BD542C88DEE476937C64F685729E.exe
  • Size 3.4MB
  • Sample251008-1p5b3seq8w
  • SHA256 e7cf9ae73751f92a53dbbc41b4939510e23352bf3a942e86b269c72b80cdb63c
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
dcratdefense_evasiondiscoveryexecutioninfostealerpersistencerattrojan

Malware Config

Targets

    • Target
      EB71BD542C88DEE476937C64F685729E.exe
    • Size 3.4MB
    • SHA256 e7cf9ae73751f92a53dbbc41b4939510e23352bf3a942e86b269c72b80cdb63c
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    defense_evasionexecutiondcratinfostealerpersistencerattrojandiscovery

    • 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.

    • UAC bypass

      defense_evasiontrojan

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

      rat

    • Checks computer location settings

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

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Checks whether UAC is enabled

      defense_evasiontrojan

    • Network Share Discovery

      Attempt to gather information on host network.

      discovery

    • SmartAssembly .NET packer

      Detects SmartAssembly .NET packer.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

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

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

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

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

4
T1112

Credential Access

Discovery

Network Share Discovery

1
T1135

Query Registry

2
T1012

System Information Discovery

3
T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks