Over 500,000 Zoom accounts are being sold on the dark web and hacker forums for less than a penny each, and in some cases, given away for free.
These credentials are gathered through credential stuffing attacks where threat actors attempt to login to Zoom using accounts leaked in older data breaches. The successful logins are then compiled into lists that are sold to other hackers.
Some of these Zoom accounts are offered for free on hacker forums so that hackers can use them in zoom-bombing pranks and malicious activities. Others are sold for less than a penny each.
Cybersecurity intelligence firm Cyble told BleepingComputer that around April 1st, 2020, they began to see free Zoom accounts being posted on hacker forums to gain an increased reputation in the hacker community.
These accounts are shared via text sharing sites where the threat actors are posting lists of email addresses and password combinations.
In the below example, 290 accounts related to colleges such as the University of Vermont, University of Colorado, Dartmouth, Lafayette, University of Florida, and many more were released for free.
BleepingComputer has contacted random email addresses exposed in these lists and has confirmed that some of the credentials were correct.
One exposed user told BleepingComputer that the listed password was an old one, which indicates that some of these credentials are likely from older credential stuffing attacks.
Accounts sold in bulk
After seeing a seller posting accounts on a hacker forum, Cyble reached out to purchase a large number of accounts in bulk so that they could be used to warn their customers of the potential breach.
Cyble was able to purchase approximately 530,000 Zoom credentials for less than a penny each at $0.0020 per account.
The purchased accounts include a victim’s email address, password, personal meeting URL, and their HostKey.