Phishing Campaigns Abuse Trusted Platforms and Legitimate Workflows to Evade Detection
Multiple campaigns are abusing legitimate cloud and platform workflows to make phishing and fraud harder to detect. Attackers are generating real Apple and PayPal invoice/dispute emails and embedding scam phone numbers in user-controlled fields (e.g., “seller notes”), resulting in messages that carry valid DKIM signatures and originate from high-reputation domains; this “DKIM replay” style abuse bypasses many email controls because authentication validates the sender domain, not the safety of the embedded content. In parallel, threat actors are leveraging free Google Firebase developer accounts to host brand-mimicking phishing pages on trusted firebaseapp.com / web.app subdomains, increasing delivery and click-through rates by exploiting domain reputation and common allowlisting of Google infrastructure.
A separate but related social-engineering technique targets Telegram users by manipulating Telegram’s official authentication workflows to obtain fully authorized sessions rather than simply stealing passwords. Victims are lured to Telegram-lookalike pages (often on ephemeral domains) that prompt QR scanning or phone-number entry; user interaction triggers a real login attempt initiated by the attacker, and once the victim approves the authorization prompt on their device, the attacker gains persistent account access and can pivot to follow-on attacks via the victim’s contacts. These incidents collectively highlight a shift toward “living off trusted services,” where adversaries avoid compromising vendors and instead weaponize legitimate features, trusted domains, and sanctioned authentication flows to reduce detection and increase victim compliance.
Timeline
Feb 9, 2026
Researchers disclose phishing via legitimate Apple and PayPal invoice emails
Kaseya reported a campaign in which attackers abused real Apple and PayPal invoicing or dispute workflows to send digitally signed emails containing scam phone numbers in user-controlled fields. The messages could pass DKIM/DMARC checks and be replayed or forwarded to victims while retaining trust signals from the original sender domains.
Feb 9, 2026
Technical details published on Telegram campaign's reusable framework
Researchers disclosed that the Telegram operation used a centralized, configuration-driven phishing framework with runtime instructions fetched from a server, attacker-controlled Telegram API credentials, multilingual support, and rapid domain rotation. The design enabled high-volume deployment and quick replacement of blocked lookalike domains.
Feb 9, 2026
Telegram phishing campaign re-emerges abusing real authorization flows
CYFIRMA reported a renewed Telegram phishing operation that tricked users into approving legitimate login requests from attacker-controlled devices via fake Telegram-branded pages. Instead of stealing passwords, the campaign obtained persistent authorized sessions after victims approved in-app prompts or QR-based logins.
Feb 1, 2026
Surge observed in Firebase-hosted phishing campaigns
In early February 2026, analysts observed an increase in phishing activity using abused Firebase projects, with attackers rapidly creating replacement projects when prior ones were suspended. The lures used urgent fraud alerts and free-item offers to drive credential theft.
Feb 1, 2026
Analysts identify phishing campaign abusing free Firebase hosting
Unit 42 reported identifying a phishing operation in early February 2026 that used free Google Firebase developer accounts to host brand-impersonation login pages on trusted firebaseapp.com and web.app subdomains. The campaign benefited from Google-hosted domain reputation to evade some email and web security filtering.
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Threat Actors Abuse Trusted Cloud and Ad Platforms for Multi-Stage Phishing and Scam Delivery
Threat actors are increasingly using **trusted platforms**—including cloud hosting and major ad networks—to deliver multi-stage phishing and scam campaigns that evade traditional URL and domain reputation controls. Recent activity includes a **three-step malvertising chain** delivered via **Facebook paid ads** that redirects victims through a decoy site (e.g., a fake Italian restaurant page) before landing on a **tech support scam (TSS) kit** hosted on **Microsoft Azure** infrastructure (including `web.core.windows.net`). Researchers reported rapid infrastructure churn, with **100+ domains rotated in seven days**, and targeting focused on **U.S. users** with activity concentrated on weekdays. Parallel enterprise-focused campaigns are hosting phishing infrastructure on **Microsoft Azure Blob Storage**, **Google Firebase**, and **AWS CloudFront**, using **redirect chains, CAPTCHA gates, and QR codes** to bypass automated analysis and email defenses. Analysis highlighted the use of **Adversary-in-the-Middle (AiTM)** phishing-as-a-service kits—**Tycoon2FA**, **Sneaky2FA**, and **EvilProxy**—to steal credentials and **session tokens** even when MFA is enabled. Separately, researchers documented a “clean email” approach to steal **Dropbox** credentials: benign-looking procurement-themed emails deliver **PDF attachments** that hide clickable elements (e.g., via *AcroForms* and `FlateDecode`), which then route victims to a second-stage file hosted on **Vercel Blob** and ultimately to a fake Dropbox login page that captures credentials and collects victim telemetry (IP address, location, and device details).
1 months ago
Multiple Social-Engineering Campaigns Abuse Trusted Platforms (Microsoft Teams, Vendor-Signed Email, Bing Ads/Azure)
Security researchers reported several **social-engineering campaigns** that abuse trusted platforms to increase credibility and bypass controls. One campaign targeted wedding planners and related vendors by hijacking trust in *Microsoft Teams*: attackers used compromised legitimate email threads and impersonated legal professionals (e.g., `czimmerman@craigzlaw[.]com`) to lure victims into clicking a fake Teams meeting link that ultimately redirected to `ussh[.]life/connect/teamsfinal/9/windows`, a site masquerading as a Teams download page. Victims were prompted to download Windows executables consistent with **information-stealer** behavior (credential/browser/session-token theft and C2 exfiltration), enabling follow-on account takeover and additional phishing. Separately, a report highlighted **DKIM replay**-style phishing in which criminals abuse legitimate notification/invoice workflows from **PayPal, Apple, and DocuSign** to generate cryptographically signed emails that pass DKIM/DMARC checks; attackers place scam content (often a fake support phone number and urgency) into user-controlled fields, send the message to themselves to obtain a “clean” vendor-signed email, then forward it to targets. Another campaign used **Bing search ads** to funnel users through a newly registered domain (`highswit[.]space`) to scam pages hosted on **Microsoft Azure Blob Storage** (consistent path pattern including `werrx01USAHTML/index.html` and a phone-number parameter), presenting fake Microsoft security warnings and directing victims to call numbers such as `1-866-520-2041` and `1-833-445-4045`; Netskope observed impact across dozens of US organizations.
1 months ago
Phishing and fraud campaigns abusing trusted infrastructure and communications
Threat actors are increasingly improving phishing success rates by abusing *trusted* channels and infrastructure rather than relying on generic lures. One observed intrusion hijacked an active executive email thread via a compromised contractor account, allowing the attacker to reply inline with a link to a Microsoft 365 lookalike login flow; analysis of detonated samples indicated use of the **EvilProxy** adversary-in-the-middle phishkit, with layered anti-bot gating (e.g., Cloudflare Turnstile) and dynamic HTML/PDF content to capture credentials without exploiting software vulnerabilities. Separately, Rapid7 documented a cloud-abuse incident where attackers used **compromised AWS credentials** to stand up phishing/spam operations using **AWS WorkMail**, leveraging Amazon’s sender reputation and sidestepping typical **SES** anti-abuse controls while generating limited, service-native telemetry that can blend into normal administrative activity. A parallel, large-scale consumer fraud operation aligned with the **“PayTool”** ecosystem was reported targeting Canadian residents through SMS-driven lures (e.g., unpaid fines) that route victims through high-fidelity impersonations of the **Government of Canada**, **Air Canada**, and **Canada Post**, including province-selection workflows designed to mimic legitimate federal-to-provincial service handoffs before directing victims to localized scam domains. In contrast, LevelBlue SpiderLabs’ write-up is broader sector telemetry on education-targeted attacks (e.g., brute force `T1110`, credential dumping `T1003`, Kerberos ticket forgery `T1558`) and does not describe the same specific phishing/fraud campaigns, though it reinforces that credential theft remains a dominant initial access path across industries.
1 months ago