SHELLCODE: X86 PexAlphaNum Encoder Routine Over TCP-CTS
This signature detects payloads being transferred over network that have been using x86 PexAlphaNum Encoder Routine. This may be an indication of someone trying to evade anti-virus/IPS solutions and possibly drop malicious code.
Extended Description
Use of the Metasploit PEX encoder to obfuscate executable code can enable an attacker to evade string-matching intrusion detection systems.
References
Short Name
SHELLCODE:MSF:PEXALPHANUM-CTS
Severity
Minor
Recommended
False
Recommended Action
Drop
Category
SHELLCODE
Keywords
Encoder Over PexAlphaNum Routine TCP-CTS X86
Release Date
03/23/2005
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
3324
Port
TCP/0-79,81-442,444-3127,3129-7999,8001-8079,8081-65535
False Positive
Unknown