A threat actor has been abusing link wrapping services from reputed technology companies to mask malicious links leading to Microsoft 365 phishing pages that collect login credentials.

The attacker exploited the URL security feature from cybersecurity company Proofpoint and cloud communications firm Intermedia in campaigns from June through July.

Some email security services include a link wrapping feature that rewrites the URLs in the message to a trusted domain and passes them through a scanning server designed to block malicious destinations.

Mozilla has warned browser extension developers of an active phishing campaign targeting accounts on its official AMO (addons.mozilla.org) repository.

Mozilla’s add-on platform hosts over 60,000 browser extensions and more than 500,000 themes used by tens of millions of users worldwide.

According to Mozilla’s advisory, these phishing emails are impersonating the AMO team and claim that the targeted developer accounts require updates to maintain access to development features.

Storm-2603 exploits Microsoft SharePoint flaws to deploy dual ransomware in APAC and Latin America.

Russian APT Secret Blizzard uses ISP-level AitM attacks to deploy ApolloShadow malware on embassy devices in Moscow.

A third variation of these attacks impersonates Teams in emails, claiming that they have unread messages and that they can click on the “Reply in Teams” button embedded in the messages to redirect them to credential harvesting pages.

“By cloaking malicious destinations with legitimate urldefense[.]proofpoint[.]com and url[.]emailprotection URLs, these phishing campaigns’ abuse of trusted link wrapping services significantly increases the likelihood of a successful attack,” Cloudflare said.

When contacted by The Hacker News for comment, Proofpoint said it’s aware of threat actors abusing URL redirects and URL protection in ongoing phishing campaigns, and that it’s a technique the company has observed from multiple security service providers who provide similar email protection or URL rewrite solutions, such as Cisco and Sophos.

The Python Software Foundation warned users this week that threat actors are trying to steal their credentials in phishing attacks using a fake Python Package Index (PyPI) website.

PyPI is a repository for Python packages, accessible at pypi.org, that offers a centralized platform for developers to distribute and install third-party software libraries. It hosts hundreds of thousands of packages and is the default source for Python’s package management tools.

“PyPI has not been hacked, but users are being targeted by a phishing attack that attempts to trick them into logging in to a fake PyPI site. Over the past few days, users who have published projects on PyPI with their email in package metadata may have received an email titled ‘[PyPI] Email verification’ from the email address [email protected],” the PyPI admin Mike Fiedler cautioned.

“We recommend reading and following Apple’s advice if you run into these issues.”

Cybersecurity professional Taha Ex also warns that some Kali use cases that require hardware passthrough will not work due to the container being isolated from hardware.