In a recent survey, 61 percent of IT professionals said they can't deter or respond to insider attacks.
The company hasn't yet determined how many locations may be affected.
The hackers stole gigabytes of sensitive data, though it's not clear whether the attacks were aimed at financial gain or cyber espionage.
A DHS advisory urges companies to work with IT, anti-virus vendors, managed service providers and PoS system vendors to check for vulnerabilities.
27 million names, resident registration numbers, account names and passwords were allegedly accessed by a Chinese hacker.
'We have seen no evidence ... of any unauthorized access to users' personal information,' the company stated.
Recent research by Venafi found that 97 percent of Global 2000 organizations' public servers remain vulnerable to Heartbleed.
According to a recent BitSight report, the higher education sector is less secure than retail or healthcare.
Customer names, mailing addresses, email addresses and payment card information may have been accessed at 51 stores in 24 states.
Experts say increased automation and better analytics will help security teams overwhelmed by Big Data.
At least two of the attacks were launched from overseas.
The hackers stole about 4.5 patients' names, addresses, birthdates, phone numbers and Social Security numbers.
Potentially affected stores include Acme Markets, Cub Foods, Farm Fresh, Horbacher's, Jewel-Osco, Shaw's, Shop 'n Save, Shoppers and Star Markets.
Hackers stole the funds from TEC Industrial in 55 separate ACH drafts on May 10, 2012.
A data center outage left the popular password management service inaccessible for several hours.
Unencrypted computers containing the data were stolen from three different medical facilities.
More than 175 million customers records were stolen in the second quarter of the year, according to SafeNet.
The company says the breach 'has all the markings of a state-sponsored attack.'
More than 2,000 current and former patients may be affected.
649,055 customers' names, user names, mailing addresses, email addresses, phone numbers and birthdates were exposed.
A Russian gang of fewer than a dozen hackers has collected more than 4.5 billion user records from over 400,000 websites and FTP sites.
A data sanitization process failed for 30 days, exposing 76,000 email addresses and 4,000 encrypted passwords.
The malware appears to have been responsible for several recent high-profile breaches, including those at Target, Neiman Marcus and Goodwill.
The NRC says it'll take a year to develop a new secure IT infrastructure.
'Users who operated or accessed hidden services from early February through July 4 should assume they were affected,' says the project's co-founder.
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