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feat: syn/tcpconnect flood / dos détection

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Oxbian
2024-11-20 21:38:37 -05:00
parent a1dcee53a1
commit d64f7283de
12 changed files with 147 additions and 18 deletions
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6
idps/rules/TCP/Scan/ackscan.py
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@ -16,7 +16,11 @@ def rule(packet, tcp_packets, db):
rule.time_window = db.get_key("ackscan_time", 180)
rule.seuil = db.get_key("ackscan_count", 5)
if tcp_packets.count_packet_of_type(["A", "R"], rule.time_window, True) + tcp_packets.count_packet_of_type(["A"], rule.time_window, True) >= rule.seuil:
# Comptage nombre de scan ack acceptés et refusés
ackdeny_count = tcp_packets.count_packet_of_type(["A", "R"], rule.time_window, True)
ackaccept_count = tcp_packets.count_packet_of_type(["A"], rule.time_window, True)
if (ackaccept_count + ackdeny_count >= rule.seuil):
db.send_alert(datetime.now(), 5, None, "ACK scan", packet['IP'].src, packet['IP'].dst, proto="TCP", reason="Détection de nombreux patterns de Ack->Reset et Ack pas de réponse", act="Alerte")
print(f"Alerte, seuil dépassés, risque d'Ack scan")
rule.cooldown = time.time()