In case of application filtering capability embedded inside IDS solutions such as SnortIDS, BroIDS or Prelude...PCRE format should be able to detect such payload signature (if constant). However, in terms of complexity of a threat, one should workout on Dynamic plug-ins to stabilize the detection problems.
Regards, ------ Shakeel Ali Information Security Evangelist Location:\x75\x6B\x2E\x75\x73\x2E\x70\x6B\x2E\x63\x6E\x2E\x63\x61\x2E\x75\x61\x65
