Microsoft 365 - Security Ticks

‘EchoLeak’ AI Attack Enabled Theft of Sensitive Data via Microsoft 365 Copilot

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‘EchoLeak’ AI Attack Enabled Theft of Sensitive Data via Microsoft 365 Copilot 2025-06-12 at 14:21 By Eduard Kovacs Microsoft recently patched CVE-2025-32711, a vulnerability that could have been used for zero-click attacks to steal data from Copilot. The post ‘EchoLeak’ AI Attack Enabled Theft of Sensitive Data via Microsoft 365 Copilot appeared first on SecurityWeek. […]

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Proofpoint to Acquire Hornetsecurity in Reported $1 Billion Deal

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Proofpoint to Acquire Hornetsecurity in Reported $1 Billion Deal 2025-05-15 at 15:24 By Eduard Kovacs Enterprise cybersecurity giant Proofpoint is buying Germany-based Microsoft 365 security solutions provider Hornetsecurity. The post Proofpoint to Acquire Hornetsecurity in Reported $1 Billion Deal appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original Source React to

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Attackers phish OAuth codes, take over Microsoft 365 accounts

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Attackers phish OAuth codes, take over Microsoft 365 accounts 2025-04-23 at 13:36 By Zeljka Zorz Suspected Russian threat actors are using OAuth-based phishing attacks to get targets to grant them access to their Microsoft 365 (M365) accounts. “The primary tactics observed involve the attacker requesting victim’s supply Microsoft Authorization codes, which grant the attacker with

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Microsoft 365 Targeted in New Phishing, Account Takeover Attacks

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Microsoft 365 Targeted in New Phishing, Account Takeover Attacks 2025-03-17 at 15:02 By Ionut Arghire Threat actors are abusing Microsoft 365 infrastructure in a BEC campaign, and target its users in two brand impersonation campaigns. The post Microsoft 365 Targeted in New Phishing, Account Takeover Attacks appeared first on SecurityWeek. This article is an excerpt

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Knostic Secures $11 Million to Rein in Enterprise AI Data Leakage, Oversharing

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Knostic Secures $11 Million to Rein in Enterprise AI Data Leakage, Oversharing 2025-03-05 at 13:02 By Ryan Naraine Knostic provides a “need-to-know” filter on the answers generated by enterprise large language models (LLM) tools. The post Knostic Secures $11 Million to Rein in Enterprise AI Data Leakage, Oversharing appeared first on SecurityWeek. This article is

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Chinese Botnet Powered by 130,000 Devices Targets Microsoft 365 Accounts

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Chinese Botnet Powered by 130,000 Devices Targets Microsoft 365 Accounts 2025-02-25 at 19:11 By Eduard Kovacs A China-linked botnet powered by 130,000 hacked devices has targeted Microsoft 365 accounts with password spraying attacks. The post Chinese Botnet Powered by 130,000 Devices Targets Microsoft 365 Accounts appeared first on SecurityWeek. This article is an excerpt from

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Massive botnet hits Microsoft 365 accounts

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Massive botnet hits Microsoft 365 accounts 2025-02-24 at 15:16 By Help Net Security A recently discovered botnet of over 130,000 compromised devices is launching coordinated password-spraying attacks against Microsoft 365 (M365) accounts. Security researchers at SecurityScorecard are examining possible connections to China-affiliated threat actors, citing evidence of infrastructure linked to CDS Global Cloud and UCLOUD

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Threat actors are using legitimate Microsoft feature to compromise M365 accounts

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Threat actors are using legitimate Microsoft feature to compromise M365 accounts 2025-02-14 at 16:23 By Zeljka Zorz Suspected Russian threat actors have been taking advantage of Microsoft Device Code Authentication to trick targets into granting them access to their Microsoft 365 (M365) accounts. “While Device Code Authentication attacks are not new, they appear to have

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Ransomware attackers are “vishing” organizations via Microsoft Teams

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Ransomware attackers are “vishing” organizations via Microsoft Teams 2025-01-21 at 14:10 By Zeljka Zorz The “email bombing + posing as tech support via Microsoft Teams” combination is proving fruitful for two threat actors looking to deliver ransomware to organizations, and they seem to be ramping up their efforts. “Sophos MDR has observed more than 15

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CISA orders federal agencies to secure their Microsoft cloud environments

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CISA orders federal agencies to secure their Microsoft cloud environments 2024-12-19 at 15:04 By Zeljka Zorz The US Cybersecurity and Infrastructure Security Agency (CISA) has issued a binding operational directive (BOD 25-01) requiring federal civilian agencies to secure their (Microsoft) cloud environments. About the CISA BOD 25-01 directive The Implementing Secure Practices for Cloud Services

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CISA Orders Federal Agencies to Secure Microsoft 365 Environments

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CISA Orders Federal Agencies to Secure Microsoft 365 Environments 2024-12-18 at 15:24 By daksh sharma Overview The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has directed the Federal Civilian Executive Branch to implement more than 50 policies to secure Microsoft 365 environments. The new policies, Binding Operational Directive (BOD) 25-01: Implementing Secure Practices for Cloud

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European companies hit with effective DocuSign-themed phishing emails

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European companies hit with effective DocuSign-themed phishing emails 2024-12-18 at 14:07 By Zeljka Zorz A threat actor looking to take over the Microsoft Azure cloud infrastructure of European companies has successfully compromised accounts of multiple victims in different firms, according to Palo Alto Networks’ Unit 42 researchers. The phishing campaign The attack started earlier this

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Unpatched MS Office flaw may leak NTLM hashes to attackers (CVE-2024-38200)

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Unpatched MS Office flaw may leak NTLM hashes to attackers (CVE-2024-38200) 2024-08-12 at 13:31 By Zeljka Zorz A new MS Office zero-day vulnerability (CVE-2024-38200) can be exploited by attackers to grab users’ NTLM hashes, Microsoft has shared late last week. The vulnerability is exploitable remotely and requires no special privileges or user interaction to be

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Microsoft 365 anti-phishing alert “erased” with one simple trick

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Microsoft 365 anti-phishing alert “erased” with one simple trick 2024-08-08 at 16:01 By Zeljka Zorz Attackers looking for a way into organizations using Microsoft 365 can make an alert identifying unsolicited (and thus potential phishing) emails “disappear”. “When an Outlook user receives an e-mail from an address they don’t typically communicate with, Outlook shows an

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Microsoft: DDoS defense error amplified attack on Azure, leading to outage

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Microsoft: DDoS defense error amplified attack on Azure, leading to outage 2024-07-31 at 13:46 By Zeljka Zorz A DDoS attack that started on Tuesday has made a number of Microsoft Azure and Microsoft 365 services temporarily inaccessible, the company has confirmed. Microsoft’s mitigation statement on the Azure status history page Microsoft Azure, 365 outage triggered

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Microsoft 365 users targeted by phishers abusing Microsoft Forms

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Microsoft 365 users targeted by phishers abusing Microsoft Forms 2024-07-29 at 12:16 By Zeljka Zorz There has been an uptick in phishing campaigns leveraging Microsoft Forms this month, aiming to trick targets into sharing their Microsoft 365 login credentials. A malicious Microsoft form (Source: Perception Point) Malicious forms leading to phishing pages impersonating Microsoft 365

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Maximizing productivity with Copilot for Microsoft 365: A security perspective

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Maximizing productivity with Copilot for Microsoft 365: A security perspective 2024-06-13 at 06:31 By Help Net Security In this Help Net Security video, Brian Vecci, Field CTO at Varonis, talks about maximizing the potential of Microsoft Copilot for 365. He highlights its productivity benefits and addresses critical security challenges, providing actionable steps to ensure safe

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Attackers abuse OAuth apps to initiate large-scale cryptomining and spam campaigns

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Attackers abuse OAuth apps to initiate large-scale cryptomining and spam campaigns 13/12/2023 at 16:46 By Helga Labus Attackers are compromising high-privilege Microsoft accounts and abusing OAuth applications to launch a variety of financially-motivated attacks. Abusing OAuth applications OAuth is an open standard authentication protocol that uses tokens to grant applications access to server resources without

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15 free Microsoft 365 security training modules worth your time

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15 free Microsoft 365 security training modules worth your time 11/10/2023 at 07:32 By Help Net Security Microsoft 365 is a cloud-based productivity suite. Beyond just tools like Word and Excel, it integrates productivity applications with cloud functionalities, device administration, and enhanced security, all within a unified experience. Managing Microsoft 365 can be difficult for

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Microsoft 365 email senders urged to implement SPF, DKIM and DMARC

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Microsoft 365 email senders urged to implement SPF, DKIM and DMARC 09/10/2023 at 13:32 By Helga Labus In the wake of Google’s announcement of new rules for bulk senders, Microsoft is urging Microsoft 365 email senders to implement SPF, DKIM and DMARC email authentication methods. “These Domain Name Service (DNS) email authentication records verify that

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