""ET WEB_CLIENT eval String.fromCharCode String Which May Be Malicious""

SID: 2012173

Revision: 3

Class Type: bad-unknown

Metadata: affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2011_01_12, deployment Perimeter, performance_impact Significant, signature_severity Major, tag Web_Client_Attacks, updated_at 2024_04_09

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

• Value: "eval|28|"

• Value: "String.fromCharCode|28|"

Within: 40

PCRE: "/eval\x28(String\x2EfromCharCode\x28|[a-z,0-9]{1,20}\x28String\x2EfromCharCode\x28)/i"

Special Options:

• fast_pattern

• nocase

• nocase

source