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:
1295
--
Summary:
This event is generated when traffic containing the RICHED20.DLL file is
detected. This may indicate Nimda worm activity.
--
Impact:
Possible infection by the Nimda virus.
--
Detailed Information:
Nimda spreads by file infection, mass emailer, file share, or IIS unicode exploit
to attack unpatched systems.
--
Affected Systems:
Windows 95
Windows 98
Windows ME
Windows 2000
--
Attack Scenarios:
An unpatched server is connected to the internet and is infected or
an infected email is opened. Once infected the worm spreads itself.
--
Ease of Attack:
Simple
--
False Positives:
Application/User may access the Microsoft RichEdit control across the
network causing a false positive.
--
False Negatives:
None known
--
Corrective Action:
Check the suspect host for signs of infection. Apply patches
or upgrade the operating system
--
Contributors:
Snort documentation contributed by Timothy Vienneau
Sourcefire Research Team
Brian Caswell <bmc@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>
--
Additional References:
Microsoft:
http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/topics/virus/nimda.asp
F-Secure:
http://www.f-secure.com/v-descs/nimda.shtml
Microsoft:
http://msdn.microsoft.com/library/en-us/vclib/html/vclrfafxinitrichedit2.asp
--
|
