When Malware Hides in Unicorns: The Cunning ZPAQ Archive

Welcome to the world of exotic malware hiding in ZPAQ archives. This isn’t your everyday virus, but a cunning one that evades detection, wrapped up in a rare archive format. With a sizeable 1GB file and an obfuscated payload, it’s a slippery devil that beats security controls.

Hot Take:

Who needs an exotic vacation when you can have exotic malware! Welcome to the world of ZPAQ archives where malware hides in plain sight. This isn’t your run-of-the-mill, everyday virus; it’s a cunning, slippery little devil that evades detection, wrapped up in an archive format that’s about as common as a unicorn’s sneeze. Oh, and did we mention the whopping 1GB size? Yeah, turns out size does matter when it comes to beating security controls. Strap in folks, we’re going in!

Key Points:

  • The phishing attempt used a ZPAQ archive, a rare file format, to house the malware.
  • The archive contained a large 1GB file intended to bypass many security controls.
  • The malware is a .Net executable that downloads an obfuscated payload from a suspicious link.
  • Due to the unusual format, the malware currently has a zero VirusTotal score.
  • None of the classic security tools on Windows OS were able to decompress the archive.

The Back Channel:

1. "ZPAQ to the Future"

Our story starts with a ZPAQ archive - think of it as the TARDIS of the malware world. It's an open-source command-line archiver for Windows and Linux, ideal for our time-traveling villain to hide in.

2. "A Sizeable Problem"

Our villain isn't just any old malware, it's a heavyweight - a whopping 1GB. That's like the digital equivalent of hiding a whale in a swimming pool. Not easy to miss, right? Wrong! This hefty size actually helps it slip past security controls.

3. "Mission: Impossible to Decompress"

The next twist in our plot? The ZPAQ archive is so unusual that none of the standard security tools on Windows OS could decompress it. It's like trying to open a can of beans with a feather. Not gonna happen!

4. "The Payload Plot"

The malware doesn't just sit there twiddling its digital thumbs; it's a .Net executable that downloads an obfuscated payload from a questionable source. It's the malware equivalent of ordering takeout when the fridge is empty.

5. "The Ghost in the Machine"

And the final twist? Despite all this sneaky behavior, the malware currently has a zero VirusTotal score. It’s like a phantom, lurking in the machine, unnoticed by the digital detectives. The game is afoot, and it's up to us to solve it!
Tags: .Net Executable, Deduplication Algorithm, Exotic Compression Algorithm, malware detection, PeaZip, Phishing Attempt, ZPAQ