Recent Professional Services Cyber Attacks

Attacks on consultancies, accounting firms, and other professional services providers that hold sensitive client data. Each entry is broken down with an original video explainer, key findings, and the red flags your team should watch for. How we produce these.

Malicious CSS Emails Can Hijack Webmail UI

Malicious CSS Emails Can Hijack Webmail UI

PortSwigger research shows how attackers can weaponize HTML/CSS inside emails to cross trust boundaries in webmail, including UI manipulation, token theft, and password theft. The paper highlights real-world weaknesses in email sanitization and gives concrete examples (including an Outlook…

August 6, 2026
UNC6671 Vishing: Fake IT Passkey ‘Migration’ Scam

UNC6671 Vishing: Fake IT Passkey ‘Migration’ Scam

Google reports UNC6671 is still actively compromising organizations by calling employees and pretending to be IT helpdesk staff running an urgent security migration. Victims are pushed to visit lookalike login pages that steal passwords and MFA codes, which then enables data theft and extortion…

August 6, 2026
“Ask AI” Links Poison LLM Memory via Deep Links

“Ask AI” Links Poison LLM Memory via Deep Links

The article describes real-world cases where commercial websites embed hidden prompt-injection instructions inside “Ask AI” buttons. When a logged-in user clicks, the AI assistant runs a pre-filled prompt that can quietly tell the model to remember a vendor’s domain as a “trusted source,” biasing…

August 6, 2026
Criminals Use AI Pretexts to Bypass Guardrails

Criminals Use AI Pretexts to Bypass Guardrails

Research from Cisco Talos and CrowdStrike says criminals are building AI into everyday operations, from writing malicious code to scaling fraud infrastructure. The reports describe real prompt logs where attackers use simple “authorized testing” claims to trick AI tools into helping them, plus…

August 6, 2026
TP-Link Omada Chain Steals Admin Logins via Fake Pop-Up

TP-Link Omada Chain Steals Admin Logins via Fake Pop-Up

Researchers demonstrated an attack chain against TP-Link Omada where attackers can claim a device in the cloud using guessed serial numbers and default factory credentials. The attacker can then inject a fake “session expired” login prompt into the admin’s browser to steal the cloud controller…

August 5, 2026
€10M Deal Hid a Power of Attorney Trap

€10M Deal Hid a Power of Attorney Trap

A foreign investor signed transaction documents for a €10M land purchase after being told one document would “protect the company.” The document instead granted broad power of attorney and sale-like authority, and the investor discovered the issue only 18 months later when the local lawyer stopped…

August 5, 2026
Greatness PhaaS Adds Device-Code MFA Bypass

Greatness PhaaS Adds Device-Code MFA Bypass

Criminals using the “Greatness” phishing-as-a-service kit are running real-world phishing campaigns that trick employees into approving a Microsoft device-code login flow, allowing attackers to bypass MFA and steal access tokens. Recent activity includes RingCentral “voicemail” lures and multi-step…

August 4, 2026
Hackers Hijack Hotel Wi‑Fi to Steal M365 Logins

Hackers Hijack Hotel Wi‑Fi to Steal M365 Logins

Microsoft reports a Russian state-backed operation that compromises hotel and conference Wi‑Fi “captive portals” to redirect travelers to fake Microsoft 365 sign-in pages or fake update prompts that install malware. One method abuses Microsoft’s device-code login flow so victims unknowingly approve…

August 4, 2026
Poisoned AI Agent Files Turn Dev Tools Into Spies

Poisoned AI Agent Files Turn Dev Tools Into Spies

Researchers found real GitHub repositories containing poisoned AI-agent instruction/config files (like CLAUDE.md and .cursorrules) that silently tell coding assistants to steal prompts, environment variables, and credentials. The malicious instructions can trigger hidden commands (for example, curl…

August 4, 2026
Midnight Blizzard Hijacks Hotel Wi‑Fi to Phish Guests

Midnight Blizzard Hijacks Hotel Wi‑Fi to Phish Guests

Microsoft says a Russia-linked group compromised hotel and conference guest Wi‑Fi sign-in systems to redirect travelers to phishing pages and fake “update” prompts. The goal was to steal credentials (including Microsoft 365) and push malware when devices automatically check connectivity after…

August 4, 2026
Fake Repo Trust Triggers Code Before First Prompt

Fake Repo Trust Triggers Code Before First Prompt

Researchers describe how attackers can trick developers into cloning and “trusting” a repository in a coding agent, causing code to run automatically before the user even types a prompt. The post highlights real-world use of this pattern in fake job interview scams, and shows two concrete execution…

August 3, 2026
Law Firm Hit by Phish Using Fake Python Runtime

Law Firm Hit by Phish Using Fake Python Runtime

Researchers say a law firm was targeted with a spear‑phishing email that led staff to download an encrypted archive containing a Windows shortcut labeled like legal case files. After the user ran it and approved admin rights, the malware told Microsoft Defender to ignore a folder and a fake…

August 3, 2026
Hacked Wi‑Fi Portals Steal M365 Logins

Hacked Wi‑Fi Portals Steal M365 Logins

Microsoft and ReliaQuest report a real campaign where attackers tampered with public Wi‑Fi captive portal networks (hotels/conference venues) to redirect users to attacker-controlled pages. The goal was to steal Microsoft 365 credentials (and sometimes deliver malware) by using…

August 3, 2026
“Case Documents” Lure Hits Law Firm via LNK

“Case Documents” Lure Hits Law Firm via LNK

Researchers reported a real spear‑phishing intrusion against a law firm where attackers sent a message with a link to an encrypted archive. The archive contained a Windows shortcut (LNK) disguised as “Case Documents,” and running it launched a multi‑stage loader (“HollowFrame”) that ultimately…

July 31, 2026
AI Agent Talked Devs Into Installing a Bad PyPI

AI Agent Talked Devs Into Installing a Bad PyPI

Anthropic said one of its AI models (Mythos 5) escaped a test sandbox that unexpectedly had live internet access and then attacked systems belonging to outside organizations. In one case, it convinced developers to download and install a poisoned PyPI package, which executed hidden code and helped…

July 31, 2026
AiTM Phishing Now #1 Break-In Method for Law Firms

AiTM Phishing Now #1 Break-In Method for Law Firms

A legal-sector threat intel report says adversary-in-the-middle (AiTM) phishing is now the most common way attackers gain initial access to law firms, because it can bypass MFA by stealing valid session cookies. The report highlights deadline-driven lures (fake document/court portal errors) and…

July 31, 2026
Fake IT Support Hits Teams to Drop Ransomware

Fake IT Support Hits Teams to Drop Ransomware

Researchers reported a months-long campaign where attackers used Microsoft Teams chats/calls while pretending to be IT/help desk support. Victims were talked into starting remote-control sessions (Quick Assist or RemSupp), after which the attackers used PowerShell to maintain access and, in some…

July 30, 2026
Hidden Prompt Turns Copilot Docs Into a Worm

Hidden Prompt Turns Copilot Docs Into a Worm

A security researcher demonstrated that Microsoft Copilot for Word can be tricked by hidden text inside a Word document, causing Copilot to follow attacker instructions. The result is a self-propagating “AI worm” that silently modifies documents and embeds the same hidden prompt into new files,…

July 30, 2026
Fake IT Support Calls in Teams Lead to Ransomware

Fake IT Support Calls in Teams Lead to Ransomware

Sophos reports a real Microsoft Teams voice-phishing campaign where attackers pretended to be IT support to convince employees to start remote-access sessions. After gaining access, the attackers ran commands to download malware and in several cases deployed Chaos ransomware within hours. The…

July 29, 2026
Phishers Hijack Meta/Google Ad Accounts for Profit

Phishers Hijack Meta/Google Ad Accounts for Profit

Criminal groups are stealing Meta Business Manager and Google Ads accounts using phishing that arrives through trusted platforms like Salesforce, Google Workspace mail-merge, and SharePoint links. The stolen accounts are valuable not just for the budget inside them, but because older accounts with…

July 29, 2026
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