SCAN: Cybercop SMTP expn
This signature detects attempts to scan the system using CyberCop Scanner. Attackers can be attempting to use the command "expn" to access additional user information from the SMTP port (EXPN identifies the delivery addresses of mail aliases and mailing lists).
Extended Description
Scanning tools are often used by hackers to determine which networks they may be able to break into.
Short Name
SCAN:CYBERCOP:SMTP-EXPN
Severity
Warning
Recommended
False
Recommended Action
None
Category
SCAN
Keywords
CVE-1999-0531 Cybercop SMTP expn
Release Date
04/22/2003
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3375
False Positive
Unknown