File: 231.txt

package info (click to toggle)
snort 2.9.7.0-5
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid, stretch
  • size: 55,000 kB
  • ctags: 38,464
  • sloc: ansic: 266,667; sh: 12,508; makefile: 2,908; yacc: 497; perl: 496; lex: 261; sed: 14
file content (70 lines) | stat: -rw-r--r-- 1,748 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
Rule:
--
Sid:
231

--
Summary:
This event is generated when a pong packet for the Trinoo (aka trin00) 
DDos suite is detected.

--
Impact:
This may indicate a compromised system or be the prelude to a
Distributed Denial of Service (DDoS) attack.

--
Detailed Information:
Once a Trinoo client has been installed on a compromised machine and a master is
ready and listening, the master sends a "png" (ping) command to its drones in 
an attempt to enumerate the drone network. A functioning client will respond to 
port 31335/udp with the text "PONG".

Once a machine becomes part of a trin00 network, a Denial of Service (DoS) 
is typically initiated against one (or more) victim machines.

--
Affected Systems:
 
--
Attack Scenarios:
As part of a large scale attack against a machine or a network, an
attacker will compromise large numbers of machines which will form the
army that the trin00 master daemon will command.  The master daemon
typically instructs the clients to send mass-quantities of packets to
a set of victim hosts.  If the traffic is sufficient, the victim
machines will become resource deprived and thus endure a DoS condition.

--
Ease of Attack:
Simple. Trinoo client and master programs are widely available.

--
False Positives:
None Known

--
False Negatives:
None Known

--
Corrective Action:
Disconnect infected machine(s) from the network immediately.

Use software to determine if a host has been compromised using a
rootkit.

--
Contributors:
Original rule writer unknown
Snort documentation contributed by Jon Hart <warchild@spoofed.org>
Sourcefire Vulnerability Research Team
Nigel Houghton <nigel.houghton@sourcefire.com>

-- 
Additional References:

SANS:
http://www.sans.org/newlook/resources/IDFAQ/trinoo.htm

--