rule Generic_Dropper { meta: description = "Detects Dropper PDB string in file" license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE" author = "Florian Roth (Nextron Systems)" reference = "https://goo.gl/JAHZVL" date = "2018-03-03" id = "60ce6a5c-2e12-515b-b8cb-8c87500cb37b" strings: $s1 = "\\Release\\Dropper.pdb" $s2 = "\\Release\\dropper.pdb" $s3 = "\\Debug\\Dropper.pdb" $s4 = "\\Debug\\dropper.pdb" condition: uint16(0) == 0x5a4d and filesize < 900KB and 1 of them }