Get free DMARC visibility with Valimail Authenticate and Microsoft Office 365

This blog post is part of the Microsoft Intelligent Security Association guest blog series. Learn more about MISA. Phishing and email spoofing not only erode brand trust but also leave recipients vulnerable to financial loss and serious invasions of privacy. These tactics have been around for...

Widespread credential phishing campaign abuses open redirector links

Microsoft has been actively tracking a widespread credential phishing campaign using open redirector links. Attackers combine these links with social engineering baits that impersonate well-known productivity tools and services to lure users into clicking. Doing so leads to a series of...

How to proactively defend against Mozi IoT botnet

Mozi is a peer-to-peer P2P botnet that uses a BitTorrent-like network to infect IoT devices such as network gateways and digital video records DVRs. It works by exploiting weak telnet passwords1 and nearly a dozen unpatched IoT vulnerabilities2 and it’s been used to conduct distributed...

Trend-spotting email techniques: How modern phishing emails hide in plain sight

With the massive volume of emails sent each day, coupled with the many methods that attackers use to blend in, identifying the unusual and malicious is more challenging than ever. An obscure Unicode character in a few emails is innocuous enough, but when a pattern of emails containing this obscur...

How to get Antivirus-related Data from Microsoft Defender for Endpoint using Intune and Graph API

Hello everyone! In this episode, I would like to tell you how I tried to get automatically antivirus-related data current status, engine and signature version, last full scan date from Microsoft Defender for Endpoint using Microsoft Intune and the Graph API. Why is this necessary? You might assum...

Attackers use Morse code, other encryption methods in evasive phishing campaign

Cybercriminals attempt to change tactics as fast as security and protection technologies do. During our year-long investigation of a targeted, invoice-themed XLS.HTML phishing campaign, attackers changed obfuscation and encryption mechanisms every 37 days on average, demonstrating high motivation...

CVE-2021-34471: Improper Privilege Management

Microsoft Defender Elevation of Privilege Vulnerability...

Spotting brand impersonation with Swin transformers and Siamese neural networks

Every day, Microsoft Defender for Office 365 encounters millions of brand impersonation emails. Our security solutions use multiple detection and prevention techniques to help users avoid divulging sensitive information to phishers as attackers continue refining their impersonation tricks. In thi...

Spotting brand impersonation with Swin transformers and Siamese neural networks

Every day, Microsoft Defender for Office 365 encounters millions of brand impersonation emails. Our security solutions use multiple detection and prevention techniques to help users avoid divulging sensitive information to phishers as attackers continue refining their impersonation tricks. In thi...

BazaCall: Phony call centers lead to exfiltration and ransomware

Our continued investigation into BazaCall campaigns, those that use fraudulent call centers that trick unsuspecting users into downloading the BazaLoader malware, shows that this threat is more dangerous than what’s been discussed publicly in other security blogs and covered by the media. Apart...

BazaCall: Phony call centers lead to exfiltration and ransomware

Our continued investigation into BazaCall campaigns, those that use fraudulent call centers that trick unsuspecting users into downloading the BazaLoader malware, shows that this threat is more dangerous than what’s been discussed publicly in other security blogs and covered by the media. Apart...

“Seven or eight” zero-days: The failed race to fix Kaseya VSA, with Victor Gevers, Lock and Code S02E13

Kaseya VSA included at least “seven or eight” privately known zero-day vulnerabilities before it suffered a widespread ransomware attack that impacted hundreds of businesses, said Victor Gevers, chair of the Dutch Institute for Vulnerability Disclosure, or DIVD, a volunteer-run organization that...

CVE-2021-34464

Microsoft Defender Remote Code Execution Vulnerability...

Remote code execution

Microsoft Defender Remote Code Execution Vulnerability...

CVE-2021-34464

Microsoft Defender Remote Code Execution Vulnerability...

CVE-2021-34464

CVE-2021-34464 affects the Microsoft Windows Defender Malware Protection Engine (Windows Defender) and is a remote code execution vulnerability in that engine. The OpenVAS/Nessus entries describe multiple RCE vulnerabilities in the Defender/Malware Protection Engine, with exploitation leading to ...

CVE-2021-34464: Undefined Security Weakness

Microsoft Defender Remote Code Execution Vulnerability...

CVE-2021-34522

Microsoft Defender Remote Code Execution Vulnerability...

Remote code execution

Microsoft Defender Remote Code Execution Vulnerability...

CVE-2021-34522

Microsoft Defender Remote Code Execution Vulnerability...