contains_pe_file.yara

/*
  Version 0.0.1 2014/12/13
  Source code put in public domain by Didier Stevens, no Copyright
  https://DidierStevens.com
  Use at your own risk

  Shortcomings, or todo's ;-) :

  History:
    2014/12/13: start
    2014/12/15: documentation
*/

rule Contains_PE_File
{
    meta:
        author = "Didier Stevens (https://DidierStevens.com)"
        description = "Detect a PE file inside a byte sequence"
        method = "Find string MZ followed by string PE at the correct offset (AddressOfNewExeHeader)"
    strings:
        $a = "MZ"
    condition:
        for any i in (1..#a): (uint32(@a[i] + uint32(@a[i] + 0x3C)) == 0x00004550)
}