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Indicator of Compromise

horizon3[.]ai

Domain Seen in 2 reports Watch this →

A domain observed in malicious infrastructure. Block or monitor it in DNS and web proxies. Shown defanged for safe viewing; use Copy live value for the functional form.

Included in the Domains feed (live, machine-readable).

Seen in these reports

Cyber Security Blog · Jun 30, 2026

SimpleHelp Exploitation Shows RMM Is a Credential Control Plane
General CTI · Jan 29, 2026

SolarWinds Fixes Six Critical Web Help Desk Vulnerabilities Including RCE and Auth Bypass

Related indicators

Indicators that appear alongside this one in the same reporting, often shared infrastructure or the same campaign.

blackpointcyber[.]com CVE-2024-28986 CVE-2024-28987 CVE-2024-28988 CVE-2025-26399 CVE-2025-40536 CVE-2025-40537 CVE-2025-40551 CVE-2025-40552 CVE-2025-40553 CVE-2025-40554 CVE-2026-48558 hxxps://blackpointcyber[.]com/blog/a-djinn-in-the-machine-taskweavers-node-js-intrusion-chain/hxxps://horizon3[.]ai/attack-research/disclosures/cve-2026-48558-simplehelp-authentication-bypass-iocs/hxxps://simple-help[.]com/release-newshxxps://simple-help[.]com/security/simplehelp-security-update-2026-05simple-help[.]com
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