Security News > 2021 > November > Microsoft warns of surge in HTML smuggling phishing attacks
Microsoft has seen a surge in malware campaigns using HTML smuggling to distribute banking malware and remote access trojans.
While HTML smuggling is not a new technique, Microsoft is seeing it increasingly used by threat actors to evade detection, including the Nobelium hacking group behind the SolarWinds attacks.
HTML smuggling is a technique used in phishing campaigns that use HTML5 and JavaScript to hide malicious payloads in encoded strings in an HTML attachment or webpage.
A phishing HTML attachment could include a harmless link to a known website, thus not being seen as malicious.
The attacks usually start with a phishing email containing an HTML link in the body of the message or a malicious HTML file as an attachment.
If either is clicked, a ZIP file is dropped using HTML smuggling.
News URL
Related news
- Microsoft: Hackers steal emails in device code phishing attacks (source)
- CISA tags Microsoft .NET and Apache OFBiz bugs as exploited in attacks (source)
- Critical RCE bug in Microsoft Outlook now exploited in attacks (source)
- Microsoft Identifies 3,000 Leaked ASP.NET Keys Enabling Code Injection Attacks (source)
- Microsoft Uncovers Sandworm Subgroup's Global Cyber Attacks Spanning 15+ Countries (source)
- Microsoft: Russian-Linked Hackers Using 'Device Code Phishing' to Hijack Accounts (source)
- Darktrace: 96% of Phishing Attacks in 2024 Exploited Trusted Domains Including SharePoint & Zoom Docs (source)
- Phishing attack hides JavaScript using invisible Unicode trick (source)
- Microsoft fixes Power Pages zero-day bug exploited in attacks (source)
- Botnet targets Basic Auth in Microsoft 365 password spray attacks (source)