Zero-day Attack Uses Corrupted Files to Bypass Detection: Technical Analysis

Summary:
In a recent analysis, researchers explored a zero-day attack that utilizes corrupted files to evade detection by security systems. The study demonstrated how attackers manipulate file structures, allowing malicious content to be recovered by applications while remaining undetected by antivirus software. This highlights significant vulnerabilities in current security measures.
#ZeroDayAttack #CorruptedFiles #MaliciousRecovery

Keypoints:

  • Attackers use corrupted files to bypass static detection systems.
  • Corrupted files can include archives and office documents.
  • Security systems often fail to detect these threats due to their inability to recover corrupted files.
  • Applications like Word can recover corrupted files, revealing malicious content.
  • VirusTotal shows zero detections for corrupted files, exposing a gap in security measures.
  • Manipulating file structures can lead to successful recovery by applications while remaining undetected by security software.

  • MITRE Techniques

  • Exploitation of Remote Services (T1210): Attackers exploit vulnerabilities in remote services to deliver corrupted files.
  • Data Obfuscation (T1001): Attackers manipulate file structures to obfuscate malicious content.
  • File and Directory Permissions Modification (T1222): Attackers may alter file permissions to facilitate the execution of corrupted files.

  • IoC:

  • [file name] corrupted.docx
  • [file name] corrupted.zip
  • [url] phishing[link].com
  • [email] attacker[at]example.com


  • Full Research: https://any.run/cybersecurity-blog/cybersecurity-blog/corrupted-files-attack/