Cybercriminals are impersonating (opens in new tab) CircleCI to try and steal GitHub accounts, both companies have confirmed.
According to the two firms, criminals are currently distributing a phishing email, in which they impersonate the continuous integration and delivery platform, CircleCI.
The email is being sent to GitHub users, and warns them that CircleCI’s user terms and privacy policy have changed, and that they need to sign into their GitHub accounts to accept the new terms.
GitHub warning
As you might expect, there is a link at the email’s bottom that the recipients can click to “accept” the changes. Those that do, risk having their GitHub account credentials, as well as two-factor (2FA) authentication codes stolen, as the attackers relay this information through reverse proxies. According to BleepingComputer, users with hardware security keys are not vulnerable.
“While GitHub itself was not affected, the campaign has impacted many victim organizations,” GitHub said in its warning.
Multiple attack domains
CircleCI has also published an announcement on its forums, warning users of the ongoing attack, and reiterating that the company will never ask users to enter any credentials to view ToS changes.
“Any emails from CircleCI should only include links to circleci.com or its sub-domains,” the company stressed.
So far, multiple domains distributing the phishing email have been confirmed:
- circle-ci[.]com
- emails-circleci[.]com
- circle-cl[.]com
- email-circleci[.]com
The attackers are after GitHub developer (opens in new tab) accounts, and if they manage to get into one, the next thing they’ll do is create personal access tokens (PATs), authorize OAuth apps, and even add SSH keys to the account, to make sure they retain the access even after the owners change the password.
After that, GitHub added, they’ll take data from private repositories. The company has since blocked a number of accounts, confirmed to have been compromised. All potentially impacted users have had their account passwords reset.
Via: BleepingComputer (opens in new tab)
English
Arabic
Belarusian
Bengali
Bosnian
Bulgarian
Chinese (Simplified)
Croatian
Czech
Danish
Dutch
Estonian
Filipino
Finnish
French
Georgian
German
Greek
Gujarati
Hausa
Hebrew
Hindi
Hmong
Hungarian
Igbo
Indonesian
Italian
Japanese
Javanese
Kazakh
Korean
Kurdish (Kurmanji)
Kyrgyz
Lao
Latvian
Lithuanian
Macedonian
Malagasy
Norwegian
Persian
Polish
Portuguese
Punjabi
Romanian
Russian
Serbian
Slovak
Slovenian
Spanish
Swedish
Thai
Turkish
Ukrainian
Vietnamese
Yoruba