General

  • Target

    https://files.catbox.moe/u6ag3a.rar

  • Sample

    250415-rzbm3swjs7

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

jvjv2044duck33.duckdns.org:1604

Mutex

DC_MUTEX-XRPJ1DD

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    pTznB8ghEqA5

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

rc4.plain

Targets

    • Darkcomet

      DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

    • Darkcomet family

    • InfinityLock Ransomware

      Also known as InfinityCrypt. Based on the open-source HiddenTear ransomware.

    • Infinitylock family

    • Modifies WinLogon for persistence

    • Modifies visibility of file extensions in Explorer

    • NanoCore

      NanoCore is a remote access tool (RAT) with a variety of capabilities.

    • Nanocore family

    • Renames multiple (4310) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Disables Task Manager via registry modification

    • Drops file in Drivers directory

    • Sets file to hidden

      Modifies file attributes to stop it showing in Explorer etc.

    • 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.

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Indicator Removal: File Deletion

      Adversaries may delete files left behind by the actions of their intrusion activity.

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Drops file in System32 directory

    • Sets desktop wallpaper using registry

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

MITRE ATT&CK Enterprise v16

Tasks