Overview

overview

10

Static

static

3

477DB3DE46...2C.exe

windows7-x64

10

477DB3DE46...2C.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    477DB3DE46B7779B63495A8BDB279F2C.exe

  • Size

    1.6MB

  • Sample

    241106-c3kmtstarc

  • MD5

    477db3de46b7779b63495a8bdb279f2c

  • SHA1

    77dc3f7d83728294c49298db82dd0e668adc3a73

  • SHA256

    8b0b6f7ba3c1c98fdc17ceb74e37057793e104dc92aa4d4319d71411b3e56366

  • SHA512

    4ac940fa7ce3c8a2a646639a5b00c5c8a1dcafcfba460782068446a321455cf5af10e1e6ae4e6753150beab7d2431a7c38192787b32c4e508b73f4b3ac843956

  • SSDEEP

    24576:/KEYWAa5pLMzdFGZWWs5cRtb6kMgmrmtXVdaNjTXf3qtzdzkkJj6:/p1JAz5cjb6k4cFdaNjTXfa/

Score
10/10
dcratdiscoveryexecutioninfostealerpersistencerat

Malware Config

Targets

    • Target

      477DB3DE46B7779B63495A8BDB279F2C.exe

    • Size

      1.6MB

    • MD5

      477db3de46b7779b63495a8bdb279f2c

    • SHA1

      77dc3f7d83728294c49298db82dd0e668adc3a73

    • SHA256

      8b0b6f7ba3c1c98fdc17ceb74e37057793e104dc92aa4d4319d71411b3e56366

    • SHA512

      4ac940fa7ce3c8a2a646639a5b00c5c8a1dcafcfba460782068446a321455cf5af10e1e6ae4e6753150beab7d2431a7c38192787b32c4e508b73f4b3ac843956

    • SSDEEP

      24576:/KEYWAa5pLMzdFGZWWs5cRtb6kMgmrmtXVdaNjTXf3qtzdzkkJj6:/p1JAz5cjb6k4cFdaNjTXfa/

    Score
    10/10
    dcratdiscoveryexecutioninfostealerpersistencerat

    • 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

    • 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

2
T1112

Credential Access

Discovery

Query Registry

2
T1012

Remote System Discovery

1
T1018

System Information Discovery

2
T1082

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks