General

  • Target

    RustUpdater.exe

  • Size

    2.3MB

  • Sample

    240722-r9l7katard

  • MD5

    50d955b49b2a8878cdd683365c83e183

  • SHA1

    9ce5bc5c6d2d71eacdd88fbdd478dd241bb96244

  • SHA256

    528a09f9d227d34e3ca3ada3286fbf3a651fd651d1028c981f5754f3dfa15d78

  • SHA512

    6ddb253922211164c8a236e733fa80c596fc68e6a9b3cc79f4d0e60fc7b7c01978633dd84151ca85773a0c906d8e288a34ba5d017fef4e50b094a9d808033fb2

  • SSDEEP

    49152:HYcIk1q0oClfViBnxZgY4PVOZovFNf5qcusO4Dmu657stUQ+h:HY1k1boAfVizZLoRvgcgQmubkh

Malware Config

Targets

    • Target

      RustUpdater.exe

    • Size

      2.3MB

    • MD5

      50d955b49b2a8878cdd683365c83e183

    • SHA1

      9ce5bc5c6d2d71eacdd88fbdd478dd241bb96244

    • SHA256

      528a09f9d227d34e3ca3ada3286fbf3a651fd651d1028c981f5754f3dfa15d78

    • SHA512

      6ddb253922211164c8a236e733fa80c596fc68e6a9b3cc79f4d0e60fc7b7c01978633dd84151ca85773a0c906d8e288a34ba5d017fef4e50b094a9d808033fb2

    • SSDEEP

      49152:HYcIk1q0oClfViBnxZgY4PVOZovFNf5qcusO4Dmu657stUQ+h:HY1k1boAfVizZLoRvgcgQmubkh

    • DcRat

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

    • Process spawned unexpected child process

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

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • Command and Scripting Interpreter: PowerShell

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

    • Checks computer location settings

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

    • Executes dropped EXE

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks