According to Security NEXT, JPCERT/CC warned in 2024 against focusing solely on VPN vulnerabilities, citing a 2023 watering hole attack targeting university-affiliated individuals [1]. After a university laboratory website was compromised, it displayed a fake Adobe Flash Player update prompt that, when executed, dropped multiple files including Cobalt Strike Beacon [1]. The malware connected to an external command-and-control server hosted on Cloudflare Workers, though the report explicitly noted that the attacking group remained unidentified [1].
This event has not been officially confirmed. Content is based on media or third-party reports.
Backfill: this event became public on Dec 26, 2024 and we added it on Nov 10, 2026. It is not a new event.
MediumMonitoringBackfillMedia reported
JPCERT/CC Warns Against Overlooking Watering Hole Attacks, Reviewing 2023 University-Related Case
1 min read
- Disclosed
- Dec 26, 2024
- Published
- Nov 10, 2026
- Last updated
- Nov 7, 2026
- CVSS basis
- Our assessment
- Attack vector
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Education
What to do nowOur advice
The malware connected to an external command-and-control server hosted on Cloudflare Workers, though the report explicitly noted that the attacking group remained unidentified [1].
Timeline
- Security NEXT publishes report (date only; timestamp is a placeholder)[1]
Technical details
Verified Source Summary
JPCERT/CC warned in 2024 against focusing solely on vulnerabilities, citing a 2023 watering hole attack targeting university-affiliated individuals [1].
After a university laboratory website was compromised, it displayed a fake Adobe Flash Player update prompt that, when executed, dropped multiple files including Cobalt Strike Beacon [1].
The malware connected to an external command-and-control server hosted on Cloudflare Workers, though the report explicitly noted that the attacking group remained unidentified [1].
References
Media1
- [1]
“「VPN」をはじめ、外部へ公開された「アタックサーフェス（攻撃対象領域）」の脆弱性や不備をついたサイバー攻撃が多発し、高い関心が寄せられている。一方でほかの侵入経路における対策が見過ごされがちであるとして、JPCERTコーディネーションセンターは、近年発生した水飲み場攻撃の事例を示し、注意を呼びかけた。”
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