global rule isExecutable { meta: author="73mp74710n" description="Yara rule to check for unobfuscated rat created with njrat" strings: $MZ = { 4D 5A 90 00 } $PE = { 50 45 00 00 } condition: $MZ at 0 and $PE } /* rule njRat { strings: $firewallDelete = "firewall delete allowed " wide $firewallAdded = "firewall add" wide /*ftw, ping ??*/ /* $ping = "ping" wide /*regular expressoin to match an ip address*/ /* $regularExp = /([0-9]{1,3}\.){3}[0-9]{1,3}/ wide condition: any of ($firewall*) or $ping or $regularExp } */