Hackers may be building a more powerful botnet for subsequent, larger attacks 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.“As I type these words, there is an on-going and highly-distributed, global attack on WordPress installations across virtually every web host in existence,” HostGator said in a post. “This attack is well organized and again very, very distributed; we have seen over 90,000 IP addresses involved in this attack,” it said.It advised anyone with WordPress installation to update their password immediately to one that meets the requirements on the WordPress website.The attack gathered steam last week, died off somewhat and picked up again Thursday morning, it said. Symptoms of the attack are slow back-end performance or an inability to log in. In some cases sites may be inaccessible for a short time, it said.HostGator said it was trying to mitigate the attack through its server farm but that it could only do so much.There was no mention of the attack on the WordPress blog or its Twitter account Friday evening.James Niccolai covers data centers and general technology news for IDG News Service. Follow James on Twitter at @jniccolai. James’s e-mail address is james_niccolai@idg.com Related content feature Cybersecurity startups to watch for in 2023 These startups are jumping in where most established security vendors have yet to go. By CSO Staff Sep 29, 2023 19 mins CSO and CISO CSO and CISO C-Suite news analysis Companies are already feeling the pressure from upcoming US SEC cyber rules New Securities and Exchange Commission cyber incident reporting rules don't kick in until December, but experts say they highlight the need for greater collaboration between CISOs and the C-suite By Cynthia Brumfield Sep 28, 2023 6 mins Regulation Data Breach Financial Services Industry news UK data regulator warns that data breaches put abuse victims’ lives at risk The UK Information Commissioner’s Office has reprimanded seven organizations in the past 14 months for data breaches affecting victims of domestic abuse. By Michael Hill Sep 28, 2023 3 mins Electronic Health Records Data Breach Government news EchoMark releases watermarking solution to secure private communications, detect insider threats Enterprise-grade software embeds AI-driven, forensic watermarking in emails and documents to pinpoint potential insider risks By Michael Hill Sep 28, 2023 4 mins Communications Security Threat and Vulnerability Management Security Software Podcasts Videos Resources Events SUBSCRIBE TO OUR NEWSLETTER From our editors straight to your inbox Get started by entering your email address below. Please enter a valid email address Subscribe