IDG News Service – Unidentified hackers are said to have have launched a large-scale attack against WordPress blogs and any hosts using weak passwords are urged to update them immediately.
Security firms have been tracking an escalating number of “brute force” attacks against WordPress installations, which have been trying out logins such as “admin” and then running through thousands of commonly-used passwords to try to break in.
“One of the concerns of an attack like this is that the attacker is using a relatively weak botnet of home PCs in order to build a much larger botnet of beefy servers in preparation for a future attack,” security and website performance firm CloudFlare said in a post Friday.
Security firm Incapsula told security blog KrebsOnSecurity that infected sites are seeded with a backdoor that gives the attackers remote control of the site. “The infected sites then are conscripted into the attacking server botnet, and forced to launch password-guessing attacks against other sites running WordPress,” the site reported.
Hosting site HostGator also warned of the attack.