General

  • Target
    SolaraBootstrapper.exe
  • Size 2.3MB
  • Sample240629-rtj29ssdpq
  • SHA256 902f94aa7222739a873f8f2805428e89822fc34842a0d731828ca0d6fce69dd6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • xworm

C2
  • football-emily.gl.at.ply.gg:39625

Attributes
  • Install_directory

    %AppData%

  • install_file

    Registry.exe

Targets

    • Target
      SolaraBootstrapper.exe
    • Size 2.3MB
    • SHA256 902f94aa7222739a873f8f2805428e89822fc34842a0d731828ca0d6fce69dd6
    • MD5 SHA1 SHA512 SSDEEP
    • DcRat

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

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Command and Scripting Interpreter: PowerShell

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

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • 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.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks