P.K. SHARMA

Cyber security intelligence, AI governance, practitioner analysis

Infoblox links 20,000 Cloudflare Pages domains to Help TDS; a browser scare becomes a remote-access lure

Infoblox’s 15 October report describes an affiliate traffic network that routes users into fake Microsoft support warnings. Its researchers followed a call through to an UltraViewer installation request. Domain counts and customer exposure are not counts of infected devices.

By Parminder Kumar Sharma · · 4 min read

Infoblox-published example of a fraudulent Microsoft-themed support warning over a browser, with a fake support number. This is a scam example, not a real Microsoft alert.

The important transition is from a warning to access

Infoblox’s 15 October 2026 report says it detected more than 20,000 Cloudflare Pages domains over six months associated with Help TDS. It assesses that the Russian-language affiliate programme Hotejka operates the network. That is vendor attribution, not a finding about a state sponsor. Infoblox report.

The article’s practical question is what a frightened browser user is induced to do next. A page that appears to lock a computer can be a route to a conversation, and that conversation can become a request for remote access. Security controls need to cover that human transition as well as the destination URL.

Infoblox says its researchers called a number in the lure and were asked to install UltraViewer. The documented test is an installation request in that interaction; it does not establish how many victims granted access. Traffic can arrive through compromised sites, advertising, social posts and spam. Researcher account.

Feature image: Scam example from Infoblox’s 15 October report. The displayed warning and contact number are fraudulent; do not use them. Credit: Infoblox Threat Intel.

Read the unit before the headline number

All campaign measurements below are Infoblox claims, with different units and windows.

Reported measureWhat it countsWhat it does not count
More than 20,000 domains / six monthsDomains detected in the vendor’s tracking20,000 infected devices
Up to 4% in one dayExposure within its cloud customer population4% of all internet users
Around seven daysReported advance detection before useA guarantee for every future domain

These are useful measurements with limited denominators. Infoblox does not publish a global victim total or an independently reproducible accuracy dataset in the reviewed report. Measurement context.

Assessment: domain churn makes a list of yesterday’s addresses an incomplete control. Conversely, belonging to a heavily used hosting platform is not enough to identify a malicious site. A defensible block needs evidence attached to the specific destination, with a way to review false positives and legitimate business impact.

The help desk needs a trusted route

Microsoft says genuine error and warning messages do not include phone numbers, and it does not make unsolicited calls offering technical support. It warns that scammers can use full-screen pages and persistent pop-ups to make a browser appear locked. Microsoft guidance.

For an organisation, publish a help-desk contact that staff can find independently of the device displaying the warning. A trusted contact route is much less useful if it is buried in a document that the frightened user cannot open. Include contractors, reception staff and shared-device users in the explanation.

The remote-access approval process should ask who initiated the session, how the support person was verified, which device is involved and what access is being requested. A familiar tool name does not answer those questions. A legitimate remote-desktop product can be misused; its presence alone is not proof of malicious activity.

Take this with you

If a support warning appears

  • Do not use the number shown in the warning or install a tool at that caller’s request. Contact your known help desk through an independent route.
  • Record the time and visible address if safe. Avoid interacting further with the page merely to collect evidence.
  • If remote access was granted, tell the security team promptly and follow its containment process. Record the tool and account involved.
  • If credentials or payment details were shared, use trusted recovery channels and tell the relevant provider. Preserve the sequence of events.
  • Report a suspicious website to the NCSC. Treat suspected fraud or a compromised device as a separate incident, not as resolved by a URL report.

UK reporting and evidence limits

The NCSC reporting page accepts suspicious website reports and advises against clicking further links or entering personal information. Its page directs fraud or cyber-crime victims in England, Wales and Northern Ireland to Report Fraud, and those in Scotland to Police Scotland. A website report is not itself a crime report.

Microsoft’s recovery advice includes removing applications the scammer requested, scanning the device, changing passwords and considering a reset after remote access was granted. On an employer-managed device, involve the security team so containment and evidence preservation are coordinated. Microsoft recovery advice.

What would change this assessment? Confirmed incident accounts, independently checked operator evidence and measurements that disclose their population, outcome and false-positive method. The immediate control remains simple: verify the support relationship before granting access.

Sources

  1. PrimaryInside Help TDS: Hotejka, Cloudflare Pages, and Predictive DetectionInfobloxaccessed 2026-10-15
  2. PrimaryProtect yourself from tech support scamsMicrosoftaccessed 2026-10-15
  3. PrimaryReport a scam website and UK reporting routesNCSCaccessed 2026-10-15

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