Linux Malware Analysis — Why Homebrew Encryption is Bad by Jacob Pimental

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Linux is one of my favorite operating systems, but you seldom see malware for it, so I was pretty interested when Linux Malware was caught by my honeypot. This article will be my analysis of the sample, particularly the decryption function that was used throughout it. It’s a good example of why using your own encryption algorithm isn’t very secure. Like with any analysis, I first toss the file into VirusTotal to see what is going on: VirusTotal Analysis of our Malware  We can see here that only 34 out of 59 vendors identified this malware, not very surprising given that it’s a Linux binary. The binary is not packed and there isn’t anything extremely interesting in the VirusTotal analysis. The next thing to do is run it through rabin2 to get some basic information about it. arch x86 binsz 646674 bintype elf bits 32 canary false class ELF32 crypto false....

January 29, 2019
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