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Harakat Ashab al-Yamin al-Islamia (HAYI), also known as Ashab al-Yamin, is a previously unknown identity that emerged in March 2026 to claim attacks against Jewish, Israeli-linked, American-linked, and other symbolic targets in Europe. Its documented claims included low-casualty arson, incendiary, and explosive attacks in Belgium, the Netherlands, and the United Kingdom, including attacks affecting synagogues, a Jewish school, and a Jewish community ambulance service. The group used Arabic-language Telegram messaging, videos, propaganda, and threats framed around opposition to Israeli and U.S. interests. Its official-facing channels were short-lived, fragmented, and dependent on supporter accounts for redistribution. HAYI claim material was disseminated rapidly through a broader Telegram ecosystem associated with Iranian-aligned Iraqi militia and media channels. Claim videos also bore Sabereen News branding, a media outlet associated with Iranian-aligned networks. Assessments by British authorities and the International Centre for Counter-Terrorism linked the operational and dissemination pattern to Iranian state-backed activity, including the Islamic Revolutionary Guard Corps and Quds Force; however, public reporting did not establish unequivocal attribution. HAYI has been assessed as potentially functioning as a front identity or media construct used to claim operations by loosely connected, locally recruited perpetrators rather than as a mature, centralized militant organization. Some of its claimed incidents were unsupported or assessed as disinformation.
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Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
Attributed origin per open-source reporting.
5 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A previously unknown group claiming eighteen attacks in Europe and London, assessed by British authorities to operate under IRGC/Quds Force direction.
Claimed a series of attacks in Europe since early March 2026, with most of the claimed attacks targeting Jewish institutions.
Emerging group claiming attacks across Europe via Telegram; assessed in the content as likely a front identity or visible node within a broader Iranian-aligned/"Islamic Resistance" media and amplification ecosystem rather than a clearly centralized standalone organization.
Claimed a series of explosive and arson attacks targeting Jewish and Israeli-linked sites in Belgium, the Netherlands, and the UK; the content assesses the group may be a façade or cover mechanism for Iranian-backed hybrid operations rather than a genuine independent terrorist organization.
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Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.