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feat: adding other TCP scan rules

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Oxbian
2024-11-19 22:15:30 -05:00
parent 3e75cb8927
commit 09abb7e20f
7 changed files with 139 additions and 5 deletions
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6
idps/rules/TCP/Scan/synscan.py
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@ -6,7 +6,7 @@ def rule(packet, tcp_packets, db):
"""Règle SYNScan:
Un SYNScan va envoyer des requêtes TCP avec le flag SYN
Si le port est ouvert alors le serveur répondra: Syn ACK, puis le client Reset la connexion
Sinon le port est fermé et le serveur répondera: Reset ACK
Sinon le port est fermé et le serveur répondra: Reset ACK
"""
if (rule.cooldown + rule.time_window > time.time()):
return
@ -16,8 +16,8 @@ def rule(packet, tcp_packets, db):
rule.time_window = db.get_key("synscan_time", 180)
rule.seuil = db.get_key("synscan_count", 5)
if tcp_packets.count_packet_of_type(["S", "RA"], rule.time_window, True) + tcp_packets.count_packet_of_type(["S", "SA", "RA"], rule.time_window, True) >= rule.seuil:
db.send_alert(datetime.now(), 5, None, "Syn scan", packet['IP'].src, packet['IP'].dst, proto="TCP", reason="Détection de nombreux patterns de Syn->SynACK->Reset ACK et Syn->Reset ACK", act="Alerte")
if tcp_packets.count_packet_of_type(["S", "RA"], rule.time_window, True) + tcp_packets.count_packet_of_type(["S", "SA", "R"], rule.time_window, True) >= rule.seuil:
db.send_alert(datetime.now(), 5, None, "Syn scan", packet['IP'].src, packet['IP'].dst, proto="TCP", reason="Détection de nombreux patterns de Syn->SynACK->Reset et Syn->Reset ACK", act="Alerte")
print(f"Alerte, seuil dépassés, risque de SynScan")
rule.cooldown = time.time()