Re: Snort-users digest, Vol 1 #951 - 16 msgs

["Mike Klinke" <LSOMike () telocity com>]

I'd guess one possiblility is that you have a user who's mailer is
configured to pick up mail once a minute from a pop3 server and either she
has someone pumping messages to her that are tripping your IDS or there's
one message that isn't getting deleted from the mail server after it's being
picked up and is constantly being re-sent whenever her mailer re-connects.
How's her disk space?

Regards, Mike Klinke

> From: john.ruff () us abb com
> To: snort-users () lists sourceforge net
> Date: Mon, 20 Aug 2001 11:23:59 -0400
> Subject: [Snort-users] Possible scr worm
>
>
>
> Any idea what might be causing this aler tot be generated?  I realize it's
POP3
> traffic (probably someone's internet mail acct.), but is there something
new out
> there generating these alerts?  I've actually got about 3600 of these
alerts
> which just started Saturday(8/18/01).  Need more info let me know.
>
> [**] [1:729:1] Virus - Possible scr Worm [**]
> 08/20-10:04:45.515817 216.136.173.10:110 -> 130.110.93.68:4062
> TCP TTL:49 TOS:0x0 ID:2259 IpLen:20 DgmLen:1500 DF
> ***A**** Seq: 0x878CAF66  Ack: 0x2AE6A993  Win: 0x4470  TcpLen: 20
>
> ***One thing additional...the source is the same IP  address, the
destination is
> an user pc on my network but the TCP ports on the destination are
increasing
> incrementally with each attack (now up to 3700).  View sample from
alert_fast
> log:
>
> 08/20-03:55:25.262609  [**] [1:729:1] Virus - Possible scr Worm [**] {TCP}
> 216.136.173.10:110 -> 130.110.93.68:3501
> 08/20-03:56:28.128075  [**] [1:729:1] Virus - Possible scr Worm [**] {TCP}
> 216.136.173.10:110 -> 130.110.93.68:3502
> 08/20-03:57:31.278385  [**] [1:729:1] Virus - Possible scr Worm [**] {TCP}
>
> Regards,
> John Ruff
>
> "Shortcuts make for long delays." - J.R.R. Tolken



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