""ET TROJAN FakeAV Check-in purporting to be MSIE with invalid terse HTTP headers""

SID: 2012627

Revision: 1

Class Type: trojan-activity

Metadata: created_at 2011_04_04, updated_at 2011_04_04

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "HTTP/1.1|0d 0a|Accept|3a 20|/|0d 0a|Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|Host|3a 20|"

  • Value: "|0d 0a|User-Agent|3a 20|Mozilla/4.0|20|(compatible|3b 20|MSIE|20|"

  • Value: ")|0d 0a|Content-Length"

  • Value: "|0d 0a 0d 0a|data="

Within:

PCRE:

Special Options:

  • fast_pattern

source