BMC Patrol component, when installed with Compaq Insight Management Agent 4.23 and earlier, or Management Agents for Servers 4.40 and earlier, creates a PFCUser account with a default password and potentially dangerous privileges.
https://exchange.xforce.ibmcloud.com/vulnerabilities/3231
http://www.compaq.com/products/servers/management/advisory.html
http://marc.info/?l=ntbugtraq&m=94183795025294&w=2
http://marc.info/?l=ntbugtraq&m=93759822430801&w=2