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Source code of computer viruses

H2T3 bug fix - Virus for FreeBSD by F0g

Virus for FreeBSD

F0g
Show all viruses by this author

2008-08-07

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Download h2t3_bf.zip (3130 bytes) or browse online

This is very simple infector for the FreeBSD. It infects all files in current directory. The virus appends new segment to the end of file by replacing PT_PHDR entry.

The code of virus consists of two parts: the head and the tail. The head (in assembler) will determine the addresses and sizes of both parts and define a wrapper for the system calls. The head invoke the tail (passing all necessary parameters) and return control to the host program. All other functions: search, read, modification, write etc embodied in tail (in C), using the system call function located in head.


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