[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fbn_HXe_vHscX2gYizQfEmz3MHi6UDclfLmUSjrU7AII":3},{"article":4,"iocs":41,"watch_terms":45,"solutions":46,"lesson":136},{"id":5,"title":6,"slug":7,"summary":8,"ai_summary":9,"brief":10,"url":11,"image_url":12,"published_at":13,"ingested_at":14,"relevance_score":15,"entities":16,"category_id":23,"category":24,"article_tags":28},"c0cdbce9-ff22-4017-bcef-99555e620011","Japan’s GMO Internet Urges Customers to Shut Down PCs After Hackers Threaten Ransomware Attack","japan-s-gmo-internet-urges-customers-to-shut-down-pcs-after-hackers-threaten-ran-c20983","Japan’s GMO Internet urged customers of its Onamae.com Desktop Cloud service to disconnect their PCs, shut them down, and unplug connected cables after suspected attackers threatened a ransomware attack. The warning followed a breach involving malicious programs on customer servers and an extortion demand of approximately ¥8 billion. The attackers threatened to publish customer information […] The post Japan’s GMO Internet Urges Customers to Shut Down PCs After Hackers Threaten Ransomware Attack appeared first on Cyber Security News.","Japan's GMO Internet is urging customers of its Onamae.com Desktop Cloud service to shut down their PCs due to a potential ransomware attack. This follows a breach where malicious programs were found on customer servers, leading to an extortion demand of approximately ¥8 billion and the subsequent publication of some company and customer information. While no ransomware attack has been confirmed, GMO is investigating customer devices and advising users to back up data and disconnect network connections as a precaution.","GMO Internet urges customers to shut down PCs after hackers threaten ransomware attack and leak data.","https:\u002F\u002Fcybersecuritynews.com\u002Fjapans-gmo-internet\u002F","https:\u002F\u002Fcybersecuritynews.com\u002Fwp-content\u002Fuploads\u002F2026\u002F10\u002FJapans-GMO-Internet-Urges-Customers-to-Shut-Down-PCs-After-Hackers-Threaten-Ransomware-Attack.webp","2026-10-28T05:42:00+00:00","2026-10-28T06:00:05.415309+00:00",8,[17,20],{"name":18,"type":19},"GMO Internet","vendor",{"name":21,"type":22},"Onamae.com Desktop Cloud","product","7d8b5ab8-ea0b-4ced-ae97-ec251b86993a",{"id":23,"icon":25,"name":26,"slug":27},null,"Ransomware","ransomware",[29,34,36],{"category":30},{"id":31,"icon":25,"name":32,"slug":33},"2e06f76c-d5b9-4f54-9eef-4d3447b10730","Breaches","breaches",{"category":35},{"id":23,"icon":25,"name":26,"slug":27},{"category":37},{"id":38,"icon":25,"name":39,"slug":40},"e7b231c8-5f79-4465-8d38-1ef13aea5a14","Threat Intelligence","threat-intelligence",[42],{"type":43,"value":27,"context":44},"malware","Threatened attack and presence of malicious programs on servers",[18,21],{"controls":47,"vendors":135},[48,77,106],{"slug":49,"name":50,"problem":51,"products":52},"endpoint-detection-response","Endpoint detection and response (EDR and XDR)","Malware and hands-on-keyboard attackers on laptops and servers get spotted and stopped.",[53,61,69],{"vendor_slug":54,"vendor_name":55,"vendor_logo":56,"product_slug":57,"product_name":58,"url":59,"description":60},"sentinelone","SentinelOne","\u002Fvendor-logos\u002Fsentinelone.png","singularity-endpoint","Singularity Endpoint","https:\u002F\u002Fwww.sentinelone.com\u002Fplatform\u002Fendpoint-security\u002F","Endpoint protection and detection with automated response and rollback.",{"vendor_slug":62,"vendor_name":63,"vendor_logo":64,"product_slug":65,"product_name":66,"url":67,"description":68},"huntress","Huntress","\u002Fvendor-logos\u002Fhuntress.png","managed-edr","Huntress Managed EDR","https:\u002F\u002Fwww.huntress.com\u002Fplatform\u002Fmanaged-edr","Endpoint detection and response monitored around the clock by Huntress analysts.",{"vendor_slug":70,"vendor_name":71,"vendor_logo":72,"product_slug":73,"product_name":74,"url":75,"description":76},"microsoft","Microsoft","\u002Fvendor-logos\u002Fmicrosoft.png","defender-for-endpoint","Microsoft Defender for Endpoint","https:\u002F\u002Fwww.microsoft.com\u002Fen-us\u002Fsecurity\u002Fbusiness\u002Fendpoint-security\u002Fmicrosoft-defender-endpoint","Endpoint detection and response for Windows, macOS, Linux and mobile devices.",{"slug":78,"name":79,"problem":80,"products":81},"immutable-backup","Immutable backup and recovery","Ransomware cannot delete or encrypt your way back.",[82,90,98],{"vendor_slug":83,"vendor_name":84,"vendor_logo":85,"product_slug":86,"product_name":87,"url":88,"description":89},"rubrik","Rubrik","\u002Fvendor-logos\u002Frubrik.png","zero-trust-data-protection","Rubrik Zero Trust Data Protection","https:\u002F\u002Fwww.rubrik.com\u002Fproducts\u002Fdata-protection","Air-gapped, immutable backup for on-premises, cloud and SaaS data, with threat detection in backups and orchestrated recovery.",{"vendor_slug":91,"vendor_name":92,"vendor_logo":93,"product_slug":94,"product_name":95,"url":96,"description":97},"veeam","Veeam","\u002Fvendor-logos\u002Fveeam.png","veeam-data-platform","Veeam Data Platform","https:\u002F\u002Fwww.veeam.com\u002Fproducts\u002Fveeam-data-platform.html","Backup and recovery for virtual, physical, cloud and SaaS workloads, with immutable storage options.",{"vendor_slug":99,"vendor_name":100,"vendor_logo":101,"product_slug":102,"product_name":103,"url":104,"description":105},"commvault","Commvault","\u002Fvendor-logos\u002Fcommvault.png","commvault-cloud","Commvault Cloud","https:\u002F\u002Fwww.commvault.com\u002Fplatform","Backup and recovery platform with immutable storage and recovery testing.",{"slug":107,"name":108,"problem":109,"products":110},"incident-response-retainer","Incident response retainer","Experts are on call before the worst day, not searched for during it.",[111,119,127],{"vendor_slug":112,"vendor_name":113,"vendor_logo":114,"product_slug":115,"product_name":116,"url":117,"description":118},"truesec","Truesec","\u002Fvendor-logos\u002Ftruesec.png","truesec-incident-response","Truesec Incident Response","https:\u002F\u002Fwww.truesec.com\u002Fservice\u002Fincident-response","Incident response team with a retainer option.",{"vendor_slug":120,"vendor_name":121,"vendor_logo":122,"product_slug":123,"product_name":124,"url":125,"description":126},"google","Google","\u002Fvendor-logos\u002Fgoogle.png","mandiant-incident-response","Mandiant Incident Response","https:\u002F\u002Fcloud.google.com\u002Fsecurity\u002Fconsulting\u002Fmandiant-incident-response-services","Incident response services from Mandiant, available on retainer.",{"vendor_slug":128,"vendor_name":129,"vendor_logo":130,"product_slug":131,"product_name":132,"url":133,"description":134},"palo-alto-networks","Palo Alto Networks","\u002Fvendor-logos\u002Fpalo-alto-networks.png","unit-42-retainer","Unit 42 Retainer","https:\u002F\u002Fwww.paloaltonetworks.com\u002Funit42\u002Fretainer","Incident response retainer with Unit 42, including preparation services.",[],{"slug":137,"title":138,"body":139,"framework_refs":140,"framework_notes":148},"gmo-internet-ransomware-threat-exposes-cloud-service-vulnerabilities","GMO Internet Ransomware Threat Exposes Cloud Service Vulnerabilities","GMO Internet's Onamae.com Desktop Cloud service was compromised after malicious programs were discovered on customer servers, resulting in an extortion demand of roughly ¥8 billion and the partial exposure of company and customer data. The incident highlights the critical danger of shared cloud environments where a breach in one area can rapidly propagate to customer-facing infrastructure. The reactive nature of GMO's response — urging customers to shut down PCs and disconnect networks only after the threat was identified — underscores the need for proactive containment strategies. When ransomware actors gain a foothold in a managed service environment, the blast radius extends far beyond the provider, putting every customer's data and operations at risk.",[141,142,143,144,145,146,147],"CIS Control 17: Incident Response Management","CIS Control 12: Network Infrastructure Management","NIST CSF 2.0 PR.AA: Identity Management, Authentication, and Access Control","ISO\u002FIEC 27001:2022 A.8.8: Management of technical vulnerabilities","NIST SP 800-53 SI-2: Flaw Remediation","MITRE ATT&CK T1486: Data Encrypted for Impact","GDPR Article 32",{"GDPR Article 32":149,"NIST SP 800-53 SI-2: Flaw Remediation":150,"CIS Control 17: Incident Response Management":151,"MITRE ATT&CK T1486: Data Encrypted for Impact":152,"CIS Control 12: Network Infrastructure Management":153,"ISO\u002FIEC 27001:2022 A.8.8: Management of technical vulnerabilities":154,"NIST CSF 2.0 PR.AA: Identity Management, Authentication, and Access Control":155},"To the extent customer personal data was exposed during the breach and subsequent publication by attackers, GMO's failure to implement appropriate technical measures — such as encryption and access controls — represents a potential violation of this article's requirements for data security.","This control mandates timely identification and patching of security flaws; had GMO maintained rigorous flaw remediation processes, the vulnerabilities exploited to deploy malware may have been closed before attackers could leverage them.","GMO's reactive posture — advising shutdowns only after the threat surfaced — indicates an absence of a mature incident response plan; this control requires predefined, tested response procedures that would have enabled faster, more coordinated containment.","The ransomware threat in this incident maps directly to this technique; defenders with EDR solutions tuned to detect mass encryption activity would have triggered earlier alerts, enabling faster isolation of affected systems.","Proper network segmentation between customer environments in the cloud service would have limited the spread of malicious programs and prevented a single breach from threatening all customers simultaneously.","Systematic identification and remediation of vulnerabilities in the cloud service infrastructure would have reduced the attack surface that allowed malicious programs to be installed on customer servers.","Enforcing strict access controls and least-privilege principles within the cloud desktop environment would have reduced the attacker's ability to move laterally across customer servers after initial compromise."]