# Sagan vsftpd-correlated.rules
# Copyright (c) 2009-2020. Quadrant Information Security <www.quadrantsec.com>
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# Please submit any custom rules or ideas to sagan-submit@quadrantsec.com or the sagan-sigs mailing list
#
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#*************************************************************

alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[VSFTPD-CORRELATED] Authentication after recon activity"; content: "OK LOGIN"; default_proto: tcp; default_dst_port: $FTP_PORT; classtype: correlated-attack; program: vsftpd; xbits: isset,recon,track ip_src; threshold: type suppress, track by_src, count 5, seconds 3600; reference: url,wiki.quadrantsec.com/bin/view/Main/5003329; sid:5003329; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[VSFTPD-CORRELATED] Authentication after honeypot activity"; content: "OK LOGIN"; default_proto: tcp; default_dst_port: $FTP_PORT; classtype: correlated-attack; program: vsftpd; xbits: isset,honeypot,track ip_src; threshold: type suppress, track by_src, count 5, seconds 3600; reference: url,wiki.quadrantsec.com/bin/view/Main/5003330; sid:5003330; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[VSFTPD-CORRELATED] Authentication after exploit attempt"; content: "OK LOGIN"; default_proto: tcp; default_dst_port: $FTP_PORT; classtype: correlated-attack; program: vsftpd; xbits: isset,exploit_attempt,track ip_src; threshold: type suppress, track by_src, count 5, seconds 3600; reference: url,wiki.quadrantsec.com/bin/view/Main/5003331; sid:5003331; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[VSFTPD-CORRELATED] Authentication after brute force activity"; content: "OK LOGIN"; default_proto: tcp; default_dst_port: $FTP_PORT; classtype: correlated-attack; program: vsftpd; xbits: isset,brute_force,track ip_src; threshold: type suppress, track by_src, count 5, seconds 3600; reference: url,wiki.quadrantsec.com/bin/view/Main/5003332; sid:5003332; rev:3;)

alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[VSFTPD-CORRELATED] File uploaded after recon activity"; content: "OK UPLOAD"; default_proto: tcp; default_dst_port: $FTP_PORT; classtype: correlated-attack; xbits: isset,recon,track ip_src; program: vsftpd; threshold: type suppress, track by_src, count 5, seconds 3600; reference: url,wiki.quadrantsec.com/bin/view/Main/5003333; sid:5003333; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[VSFTPD-CORRELATED] File uploaded after honeypot activity"; content: "OK UPLOAD"; default_proto: tcp; default_dst_port: $FTP_PORT; classtype: correlated-attack; xbits: isset,honeypot,track ip_src; program: vsftpd; threshold: type suppress, track by_src, count 5, seconds 3600; reference: url,wiki.quadrantsec.com/bin/view/Main/5003334; sid:5003334; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[VSFTPD-CORRELATED] File uploaded after exploit attempt"; content: "OK UPLOAD"; default_proto: tcp; default_dst_port: $FTP_PORT; classtype: correlated-attack; xbits: isset,exploit_attempt,track ip_src; program: vsftpd; threshold: type suppress, track by_src, count 5, seconds 3600; reference: url,wiki.quadrantsec.com/bin/view/Main/5003335; sid:5003335; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[VSFTPD-CORRELATED] File uploaded after brute force activity"; content: "OK UPLOAD"; default_proto: tcp; default_dst_port: $FTP_PORT; classtype: correlated-attack; xbits: isset,brute_force,track ip_src; program: vsftpd; threshold: type suppress, track by_src, count 5, seconds 3600; reference: url,wiki.quadrantsec.com/bin/view/Main/5003336; sid:5003336; rev:3;)