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Failures in Twitter’s Two-Factor Authentication System

Schneier on Security

Twitter is having intermittent problems with its two-factor authentication system: Not all users are having problems receiving SMS authentication codes, and those who rely on an authenticator app or physical authentication token to secure their Twitter account may not have reason to test the mechanism.

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A large botnet targets M365 accounts with password spraying attacks

Security Affairs

A botnet of 130,000+ devices is attacking Microsoft 365 accounts via password-spraying, bypassing MFA by exploiting basic authentication. SecurityScorecard researchers discovered a botnet of over 130,000 devices that is conducting password-spray attacks against Microsoft 365 (M365) accounts worldwide.

Passwords 119
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Change Healthcare Breach Hits 100M Americans

Krebs on Security

The chief information security officer for a large academic healthcare system affected by the breach told KrebsOnSecurity they participated in a call with the FBI and were told a third party partner managed to recover at least four terabytes of data that was exfiltrated from Change by the cybercriminal group. .”

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Attackers exploited SonicWall SMA appliances since January 2025

Security Affairs

A remote authenticated attacker can exploit the flaw to inject arbitrary commands as a nobody user, which could potentially lead to arbitrary code execution. Threat actors were spotted exploiting the default super admin account (admin@LocalDomain), which often still uses the weak default password password. ” reads the advisory.

Passwords 105
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Not All MFA is Equal, and the Differences Matter a Lot

Daniel Miessler

People are starting to get the fact that texts (SMS) are a weak form of multi-factor authentication (MFA). In that post we talked about 8 levels of password security, starting from using shared and weak passwords and going all the way up to passwordless. It completely changes how authentication is done.

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Japan ’s FSA warns of unauthorized trades via stolen credentials from fake security firms’ sites

Security Affairs

Japan s Financial Services Agency (FSA) warns of hundreds of millions in unauthorized trades linked to hacked brokerage accounts. from fake websites (phishing sites) disguised as websites of real securities companies.” Avoid password reuse, choose complex passwords, and check account activity often.

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Storm-2372 used the device code phishing technique since August 2024

Security Affairs

The attackers employ a phishing technique called device code phishing, which tricks users into logging into productivity apps while capturing login tokens that can be used to take over compromised accounts. ” Device code phishing attacks exploit authentication flows to steal tokens, granting attackers access to accounts and data.

Phishing 113