""ET WEB_CLIENT Download of PDF With Uncompressed Flash Content flowbit set""

SID: 2012906

Revision: 5

Class Type: misc-activity

Metadata: affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2011_05_31, deployment Perimeter, signature_severity Major, tag Web_Client_Attacks, updated_at 2018_02_02

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "stream"

  • Value: "|0a|FWS"

Within: 5

PCRE: "/stream(\x0D\x0A|\x0A)FWS/"

Special Options:

  • fast_pattern

source