Extracted

• • Target

    TasNET 6.4.2.exe

  • Size

    11.0MB

  • MD5

    98680a096ea18299b58b5edc02c32fe3

  • SHA1

    16a15c4d9cd2d0b06d5a562652674015984a4069

  • SHA256

    31cadbe69cb9aa413846173101ab221115ca248d2154343fe27ecb2190597134

  • SHA512

    712e55650066520045fff13ad0326d871a7d4bc6c68c7e6ee0174259fa7a357ce93bdafb18cfbb682fbd2c0f1d28cdeed883c5c729238576210715b6f4d17e30

  • SSDEEP

    196608:PpBZ9P7gzj9Pjnt8unJQfPngNQJdVilMG9/bpsBJKtJF1yP3hYjsB:fZlcNCunmf4NUE/tYK1yvU

  Score

  10^/10

  dcratxwormdiscoveryexecutioninfostealerpersistenceratspywarestealertrojanransomware

  • DcRat

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

    ratinfostealerdcrat

  • Dcrat family

    dcrat

  • Detect Xworm Payload

  • Modifies WinLogon for persistence

    persistence

  • Process spawned unexpected child process

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

  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm

  • Xworm family

    xworm

  • Command and Scripting Interpreter: PowerShell

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

    execution

  • Downloads MZ/PE file

  • Checks computer location settings

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

  • Deletes itself

  • 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.

    spywarestealer

  • Adds Run key to start application

    persistence

  • 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.

  • Drops file in System32 directory

  • Sets desktop wallpaper using registry

    ransomware
  behavioral1behavioral2