Full Report
Pro-Iran hackers who took credit for a nationwide Friday outage of a platform delivering emergency alerts in major U.S. cities said today that they hacked the National Weather Service website. “The National Weather Service webpage is currently experiencing an outage,” the NWS Grand Junction account posted at 12:06 p.m. on X. “As of now, there…
Analysis Summary
# Incident Report: Pro-Iran Hacker Attack on National Weather Service (NWS)
## Executive Summary
On June 28, 2026, the pro-Iran hacking group "Islamic Cyber Resistance in Iraq – 313 Team" launched a coordinated Distributed Denial of Service (DDoS) attack against the National Weather Service (NWS) website. The attack caused significant intermittent outages and operational disruptions during a critical weather period involving a national "heat dome." The incident follows a pattern of high-frequency attacks by the same group against U.S. critical infrastructure and private sector platforms.
## Incident Details
- **Discovery Date:** June 28, 2026
- **Incident Date:** June 28, 2026
- **Affected Organization:** National Weather Service (NWS)
- **Sector:** Government / Critical Infrastructure (Emergency Services)
- **Geography:** United States (National)
## Timeline of Events
### Initial Access
- **Date/Time:** June 28, 2026, approximately 9:00 a.m. EST
- **Vector:** Distributed Denial of Service (DDoS)
- **Details:** Users began reporting accessibility issues with `weather[.]gov` on Downdetector as the threat actors flooded the site's infrastructure with traffic.
### Lateral Movement
- **N/A:** The attack was designed for service disruption via external traffic flooding; no lateral movement within internal NWS networks was reported in the provided article.
### Data Exfiltration/Impact
- **Operational Impact:** The NWS website became inaccessible or experienced extreme latency.
- **Timing:** 10:14 a.m. (Attack claimed by 313 Team); 11:00 a.m. (Attack intensity increased); 12:06 p.m. (NWS Grand Junction confirms outage).
- **Duration:** Intermittent outages lasted several hours before restoration at approximately 1:45 p.m. EST.
### Detection & Response
- **Discovery:** Public reports on Downdetector followed by official monitoring from NWS Grand Junction.
- **Response Actions:** Infrastructure mitigation efforts (implied) led to the restoration of services by 1:45 p.m. EST.
## Attack Methodology
- **Initial Access:** Network-layer and Application-layer flooding (DDoS).
- **Persistence:** Not applicable for this attack type; however, attackers issued "extensions" to the attack duration via Telegram.
- **Privilege Escalation:** None reported.
- **Defense Evasion:** Use of distributed botnets to bypass simple IP filtering.
- **Credential Access:** None reported.
- **Discovery:** External reconnaissance of publicly available government web infrastructure.
- **Lateral Movement:** None reported.
- **Collection:** None reported.
- **Exfiltration:** None reported.
- **Impact:** Resource Exhaustion; service unavailability during a critical weather event (heat dome and fire weather).
## Impact Assessment
- **Financial:** Unknown; indirect costs related to incident response and mitigation.
- **Data Breach:** None; the incident was an availability attack, not a confidentiality breach.
- **Operational:** Significant disruption to the dissemination of weather alerts and emergency information across the U.S.
- **Reputational:** High public visibility due to NWS's role in life-safety alerts; exacerbated by the simultaneous outage of the Everbridge/AlertDC platform.
## Indicators of Compromise
- **Network indicators:** High volume of traffic targeting `weather[.]gov`.
- **Behavioral indicators:** Public claims of responsibility on Telegram by "Islamic Cyber Resistance in Iraq – 313 Team."
- **Messaging:** Threat actor statements citing "vengeance" for Ayatollah Khamenei and "Operation Epic Fury."
## Response Actions
- **Containment measures:** Implemented DDoS mitigation protocols to filter malicious traffic.
- **Eradication steps:** Gradual restoration of web services.
- **Recovery actions:** Public communication via X (formerly Twitter) to inform citizens of the outage and eventual restoration.
## Lessons Learned
- **Critical Timing:** Adversaries are increasingly timing disruptions to coincide with environmental crises (e.g., heatwaves/wildfires) to maximize psychological and operational impact.
- **Interdependency Risk:** The simultaneous disruption of NWS and third-party alert platforms (Everbridge) highlights a fragile ecosystem for emergency communications.
- **Ideological Persistence:** The 313 Team is a persistent threat, having previously targeted Microsoft, Spotify, Bluesky, and eBay.
## Recommendations
- **Robust DDoS Mitigation:** Employ always-on, cloud-based scrubbing services to handle high-volumetric attacks.
- **Redundancy:** Ensure critical weather data is accessible through multiple, geographically dispersed channels (API, Radio, Social Media) that do not share the same infrastructure.
- **Geofencing:** Consider temporary geofencing or rate-limiting of non-domestic traffic during active attack windows if the audience is primarily domestic.