Hacktivist Campaigns and Defacements Spread Across the Israel-Hamas War

Hacktivist groups rapidly turned the Israel-Hamas war into a parallel cyber conflict, launching DDoS attacks, website defacements, data leak claims, and disruptive messaging operations against media outlets, government sites, private companies, and public-facing services. Reports said the Jerusalem Post suffered outages, the Israeli Red Alert missile warning app was targeted, and broader campaigns such as #OpIsrael and OpsRise mobilized pro-Palestinian, pro-Russian, and other aligned actors against Israeli targets. Researchers also noted retaliatory activity by pro-Israel groups against Palestinian entities, while spillover attacks hit organizations in countries seen as backing one side or the other.

The activity extended beyond websites into physical and operational systems. Attackers reportedly hijacked Israeli smart billboards to display pro-Hamas messages, while analysts warned that opportunistic actors were probing critical infrastructure and operational technology tied to power, water, fuel, and ISP networks. Cybersecurity firms and news outlets described the campaign as dominated by loosely coordinated hacktivist collectives, with pro-Palestinian groups outnumbering pro-Israel actors and some cybercriminals joining the fray. At the same time, the Israel-linked group Predatory Sparrow resurfaced amid the fighting, underscoring concerns that more capable state-aligned or advanced threat actors could deepen the conflict's cyber dimension.