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Ashley Madison data breach

2015 leak of personal data from an online dating service

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Through Affair, Personal data and Email

Because of the site's lack of adequate security and practice of not deleting personal information from its database – including real names, home addresses, search history and credit card transaction records – many users feared being publicly shamed.

On 18 and 20 August, more than 60 gigabytes of additional data was publicly released, including user details. This included personal information about users who had paid the site to delete their personal information, showing that the data was not deleted.

Timeline

The Impact Team announced the attack on 19 July 2015 and threatened to expose the identities of Ashley Madison's users if its parent company, Avid Life Media, did not shut down Ashley Madison and its sister site, "Established Men".

On 20 July 2015, the Ashley Madison website put up three statements under its "Media" section addressing the breach. The website's normally busy Twitter account fell silent apart from posting the press statements. One statement read:

At this time, we have been able to secure our sites, and close the unauthorized access points. We are working with law enforcement agencies, which are investigating this criminal act. Any and all parties responsible for this act of cyber-terrorism will be held responsible. Using the Digital Millennium Copyright Act (DMCA), our team has now successfully removed the posts related to this incident as well as all Personally Identifiable Information (PII) about our users published online.

The site also offered to waive its account deletion charge.

More than 2,500 customer records were released by "The Impact Team" on 21 July. Initially, Ashley Madison customer service representatives denied that its main database was insecure and had been hacked. However, Noel Biderman, the CEO of Avid Life Media, said: "We’re not denying this happened." He added that the hack was "a criminal act."

More than 60 gigabytes of additional data was released on 18 August and was confirmed to be valid. The information was released on BitTorrent in the form of a 10 gigabyte compressed archive; the link to it was posted on a dark web site only accessible via the anonymity network Tor. The data was cryptographically signed with a PGP key. In its message, the group blamed Avid Life Media, accusing the company of deceptive practices: "We have explained the fraud, deceit, and stupidity of ALM and their members. Now everyone gets to see their data ... Too bad for ALM, you promised secrecy but didn't deliver." In response, Avid Life Media released a statement that the company was working with authorities to investigate, and said the hackers were not "hacktivists" but criminals.

Yet another data dump occurred on 20 August 2015, the largest file of which comprised 12.7 gigabytes of corporate emails, including Biderman's.

In July 2017, Avid Life Media (renamed Ruby Corporation) agreed to settle two dozen lawsuits stemming from the breach for $11.2 million.

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