signature-base/yara/pup_lightftp.yar

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rule LightFTP_fftp_x86_64 {
meta:
description = "Detects a light FTP server"
license = "https://creativecommons.org/licenses/by-nc/4.0/"
author = "Florian Roth"
reference = "https://github.com/hfiref0x/LightFTP"
date = "2015-05-14"
hash1 = "989525f85abef05581ccab673e81df3f5d50be36"
hash2 = "5884aeca33429830b39eba6d3ddb00680037faf4"
score = 50
strings:
$s1 = "fftp.cfg" fullword wide
$s2 = "220 LightFTP server v1.0 ready" fullword ascii
$s3 = "*FTP thread exit*" fullword wide
$s4 = "PASS->logon successful" fullword ascii
$s5 = "250 Requested file action okay, completed." fullword ascii
condition:
uint16(0) == 0x5a4d and filesize < 250KB and 4 of them
}
rule LightFTP_Config {
meta:
description = "Detects a light FTP server - config file"
license = "https://creativecommons.org/licenses/by-nc/4.0/"
author = "Florian Roth"
reference = "https://github.com/hfiref0x/LightFTP"
date = "2015-05-14"
hash = "ce9821213538d39775af4a48550eefa3908323c5"
strings:
$s2 = "maxusers=" wide
$s6 = "[ftpconfig]" fullword wide
$s8 = "accs=readonly" fullword wide
$s9 = "[anonymous]" fullword wide
$s10 = "accs=" fullword wide
$s11 = "pswd=" fullword wide
condition:
uint16(0) == 0xfeff and filesize < 1KB and all of them
}