General

  • Target
    540b4b9c6afd6d88d93ea8700c287fac.exe
  • Size 729KB
  • Sample210804-byhf4abtps
  • SHA256 dc6f024b81983ce22d883ccc346b3888d984e360196b3e472c1cce3f79b70fa0
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • vidar

Version
  • 39.9

Botnet
  • 517

C2
  • https://prophefliloc.tumblr.com/

Attributes
  • profile_id

    517

Targets

    • Target
      540b4b9c6afd6d88d93ea8700c287fac.exe
    • Size 729KB
    • SHA256 dc6f024b81983ce22d883ccc346b3888d984e360196b3e472c1cce3f79b70fa0
    • MD5 SHA1 SHA512
    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    • suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

    • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    • Vidar Stealer

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses 2FA software files, possible credential harvesting

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • 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.

    • 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 SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks