General

  • Target

    CL_Installer1.0.exe

  • Size

    35.9MB

  • Sample

    240622-ptjqdsybmb

  • MD5

    826f0286ed14785ecd3fed6dd678eb16

  • SHA1

    fe8693146e92c20c58ef0ec99ccaddae0366d8cd

  • SHA256

    8e9de4ec550d77ff22c6c252c6f82ca8ef3ed7a5202950577451aed287b71504

  • SHA512

    3a373329883505bd77e14c69f9f719b600cce5f59eff27cc4f4916ddbec184235d19214916830031e7560fed0038a67b30115ea33a7211355682b2c58d2544c1

  • SSDEEP

    786432:CQ+HRamFgny3dwZ3mX7aIZkp8m7Ex015UlI2d/4niKRQA:C/HR5twZ3mXWbml015Ull2iKV

Malware Config

Targets

    • Target

      CL_Installer1.0.exe

    • Size

      35.9MB

    • MD5

      826f0286ed14785ecd3fed6dd678eb16

    • SHA1

      fe8693146e92c20c58ef0ec99ccaddae0366d8cd

    • SHA256

      8e9de4ec550d77ff22c6c252c6f82ca8ef3ed7a5202950577451aed287b71504

    • SHA512

      3a373329883505bd77e14c69f9f719b600cce5f59eff27cc4f4916ddbec184235d19214916830031e7560fed0038a67b30115ea33a7211355682b2c58d2544c1

    • SSDEEP

      786432:CQ+HRamFgny3dwZ3mX7aIZkp8m7Ex015UlI2d/4niKRQA:C/HR5twZ3mXWbml015Ull2iKV

    • DcRat

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

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

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

    • XMRig Miner payload

    • Command and Scripting Interpreter: PowerShell

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

    • Stops running service(s)

    • 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

    • Power Settings

      powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks