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New Technique Zombie Zip Hide Malware In Zip File

A new technique, Zombie Zip, hides malware in an over-the-top Zip file until the anti-virus goes undetected.

Using a zip-type compressed file to misrepresent malware files is one of the most popular ways for hackers to deceive victims to download, decompress, and install malware. This method, if done correctly, reduces the likelihood of detection by anti-malware tools. But the following methods can be called much more insidious and intelligent than the above methods.

According to a report by the website, Cyber News has mentioned that if malware is detected by using a security vulnerability on a Zip file to hide malware code and evade the detection of malware detection tools such as anti-virus software, which, according to the review, allows the file to be detected by 65 out of 66 anti-viruses. Only one Kingsoft anti-virus can be detected. It is called a very potent method. This method is called Zombie Zip, which changes the data in the header or the header of the Zip file. The Metadata repository is used to describe the tool used to decompress the file, how to decompress the file (Extract) or fix the file (Repair). But by converting the value, the tool understands that the file itself is not an uncompressed file. By changing the value of the Compression Mode to STORED in just one byte, it leads to deceiving the anti-virus tool that this file is a normal file. It is safe. The decompressed file does not have to be decompressed to check. It can be avoided.

Fortunately, the tools for loosening popular files such as 7-Zip, unzip, bsdtar, and Python's zipfile cannot be loosened. This means that victims cannot loosen them and install malware as intended by the hackers behind the attack. But this does not mean that the method is harmless or harmless, because a report by the CERT Coordination Center (CERT / CC), a subunit of Carnegie Mellon University, warns that there are many other loosening tools that can loosen Zombie Zip-type files, even if the upper values are changed. Header followed that approach, allowing hackers to also use the Phishing deception method or the trick method to download and install files with a fake error alert (ClickFix) to send malware in the Zombie Zip file format and successfully install malware on the machine.

The associated vulnerability was coded CVE-2026-0866, but it was later brushed off by a team involved in organizing security vulnerability data, as the vulnerability was predicted to be non-new due to its resemblance to one of the security vulnerabilities that was detected during 2004 (2004) or more than 20 years ago, with the vulnerability listed as being able to let Zip files evade detection from antivirus software with the same method of changing values on Header.

# Trending # Lemon 8 Howtoo # lemon 8 diary # freedomhack # ZIP

4/5 Edited to

... Read moreจากประสบการณ์ส่วนตัวในการใช้งานคอมพิวเตอร์และดาวน์โหลดไฟล์จากอินเทอร์เน็ต พบว่าไฟล์ Zip เป็นอีกหนึ่งรูปแบบไฟล์ที่นิยมใช้แชร์ข้อมูลกันมาก แต่ก็มีความเสี่ยงสูงเนื่องจากแฮกเกอร์มักใช้วิธีแอบซ่อนไฟล์มัลแวร์ในไฟล์ Zip ที่ดูเหมือนไม่อันตราย วิธี Zombie Zip ที่กล่าวในบทความนี้ทำให้ไฟล์ Zip หลอกโปรแกรมแอนตี้ไวรัสว่าปลอดภัย เพราะเปลี่ยนค่า Compression Mode ให้ดูเหมือนไม่ได้ถูกบีบอัดจริงๆ จึงไม่ถูกตรวจสอบลึกลงไป ซึ่งผมเคยเจอกรณีแบบนี้จริงๆ ครั้งหนึ่งที่เครื่องติดไวรัสจากไฟล์ Zip ที่ดาวน์โหลดผ่านอีเมลล์ แต่โชคดีที่ใช้โปรแกรมแอนตี้ไวรัสที่มีการอัปเดตฐานข้อมูลไวรัสอย่างสม่ำเสมอ ทำให้แอนตี้ไวรัสสามารถจับสัญญาณผิดปกติได้ก่อนส่งผลเสียหนัก หลังจากอ่านข้อมูลนี้ ผมแนะนำให้ทุกคนระวังมากขึ้นต่อไฟล์ Zip ที่ดาวน์โหลดจากแหล่งที่ไม่น่าเชื่อถือ และไม่ควรคลายไฟล์ด้วยโปรแกรมที่ไม่รู้จักหรือเก่าเกินไป เพราะอาจไม่ตรวจจับเทคนิค Zombie Zip ได้ การอัปเดตโปรแกรมแอนตี้ไวรัสและใช้เครื่องมือคลายไฟล์ยอดนิยม เช่น 7-Zip หรือ Python’s zipfile จะช่วยลดความเสี่ยงได้มาก นอกจากนี้ การเปิดรับไฟล์ Zip ผ่านอีเมลล์ควรแน่ใจว่ามาจากแหล่งที่น่าเชื่อถือ และหากเจอไฟล์ Zip แจ้งเตือนข้อผิดพลาดปลอม (ClickFix) ให้ระมัดระวังเป็นพิเศษ เพราะนั่นอาจเป็นฝีมือของแฮกเกอร์ที่จะชักนำให้ติดตั้งมัลแวร์ การเรียนรู้และติดตามข่าวสารช่องโหว่ความปลอดภัย เช่น CVE-2026-0866 จะช่วยให้เรามีความรู้ป้องกันภัยไซเบอร์ได้ดีขึ้น ในยุคนี้ที่ภัยคุกคามคล่องตัวและซับซ้อนขึ้นทุกวัน การตระหนักรู้คือกุญแจสำคัญในการป้องกันตัวเองและองค์กรไม่ให้ตกเป็นเหยื่อของมัลแวร์แนวใหม่อย่าง Zombie Zip

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