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Security Intelligence Center
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Short Name

POP3:EXT:DOT-INF

Severity

Medium

Recommended

No

Category

POP3

Keywords

.inf e-mail attachment

Release Date

2004/07/28

Update Number

1213

Supported Platforms

di-5.3+, idp-4.0+, isg-3.0+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+

POP3: .INF


This signature detects e-mail attachments that have the extension .inf and were received through POP3. Because .INFs (Setup Information) files contain scripts, this can indicate an incoming e-mail virus. Attackers can create malicious scripts, tricking users into executing the file and infecting the system.

Extended Description

The impact on the target system is dependent on the instructions contained in the malicious .inf file.

References

  • URL: http://www.cknow.com/vtutor/FileExtensions.html
  • URL: http://www.novatone.net/mag/mailsec.htm
  • URL: http://support.microsoft.com/?kbid=235309

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