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successful dos attack
From: Balla István <balla.bmf () gmail com>
Date: Fri, 10 May 2013 22:58:45 +0200

hey guys,

recently i launched a dos attack which was successful against an ssh server
(it killed the service). I set the preproc and detection rules for ssh and
dos attacks to drop. I used loic and set to simulate 1000 users. I wonder
why it was successful since snort detected the event and relevant rule is
drop.

*(Event)
    sensor id: 0    event id: 451    event second: 1368138414    event
microsecond: 535870
    sig id: 4    gen id: 128    revision: 1     classification: 25
    priority: 2    ip source: 209.100.10.2    ip destination: 10.10.10.2
    src port: 64380    dest port: 22    protocol: 6    impact_flag: 32
blocked: 1

Packet
    sensor id: 0    event id: 451    event second: 1368138414
    packet second: 1368138414    packet microsecond: 535870
    linktype: 1    packet_length: 86
[    0] CA 01 0E 20 00 1C CA 00 0E 20 00 08 08 00 45 00  ... ..... ....E.
[   16] 00 48 55 9E 40 00 7F 06 B6 9F D1 64 0A 02 0A 0A  .HU. ()       d    
[   32] 0A 02 FB 7C 00 16 D9 5D 08 01 BF FA 92 2E 50 18  ...|...]......P.*

I attach the capture file caught on the attacked host.

Attachment: dos_ssh.pcap
Description:

------------------------------------------------------------------------------
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