Beware the Sneaky Script: Python Malware’s Syscall Shenanigans!
This weekend’s malware discovery features a “simple” Python script dropper with a twist: direct use of syscall obfuscation technique! It’s like finding a magician who skips the wand and goes straight for the rabbit. This proof-of-concept targets Linux systems with a Base64 payload that encrypts files using a 1-byte XOR key.
Hot Take:
Ah, another weekend, another bit of malware to keep the cyber detectives busy. It seems like this new malware is less a villain and more an aspiring stage actor, still working on its craft with a proof-of-concept performance. With its flair for the dramatic, our malware friend uses syscall() like a Shakespearean actor breaking the fourth wall. Bravo, malware, bravo! A round of applause for making the simple act of obfuscation slightly more entertaining!
Key Points:
- The malware dropper is a Python script with a low detection rate on VirusTotal.
- It employs syscall() directly instead of more common functions to execute its payload.
- The second-stage payload is an ELF file targeting Linux systems.
- The ELF file encrypts files using a simple 1-byte XOR key.
- syscall 319, “memfd_create,” is used to create a file descriptor in memory.