General

  • Target
    aec009724ba208376f91cbfafd60db1e965f9016f17f14bfb3b074dde1f6ae28.exe
  • Size 19.8MB
  • Sample240518-brk9jsdd57
  • SHA256 aec009724ba208376f91cbfafd60db1e965f9016f17f14bfb3b074dde1f6ae28
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • umbral

C2
  • https://discord.com/api/webhooks/1221847080373584144/7stbODqa-C2IH_V1s7-AaD6fECqR68YLov_s341xewFGvFGlgl7fRFcAsV3CtRNlSgzQ

Extracted

Family
  • xworm

C2
  • 127.0.0.1:30683

  • operating-niger.gl.at.ply.gg:30683:30683

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

Targets

    • Target
      aec009724ba208376f91cbfafd60db1e965f9016f17f14bfb3b074dde1f6ae28.exe
    • Size 19.8MB
    • SHA256 aec009724ba208376f91cbfafd60db1e965f9016f17f14bfb3b074dde1f6ae28
    • MD5 SHA1 SHA512 SSDEEP
    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Detect Umbral payload

    • Detect Xworm Payload

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Xworm

      Xworm is a remote access trojan written in C#.

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • Detects Windows executables referencing non-Windows User-Agents

    • Detects executables attemping to enumerate video devices using WMI

    • Detects executables containing possible sandbox analysis VM names

    • Detects executables containing possible sandbox analysis VM usernames

    • Detects executables containing possible sandbox system UUIDs

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Drops startup file

    • 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.

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

MITRE ATT&CK Enterprise v15

Tasks