GMO Hack Fallout: Government Orders ISPs to Block Extortion Site, But 5ch Doubts It’ll Do Any Good

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The story

After a GMO Internet group service suffered an unauthorized intrusion and an extortion site appeared publishing data purportedly belonging to customers, the Asahi Shimbun reports that Japan’s Ministry of Internal Affairs and Communications (MIC) asked telecom carriers, through an industry body, to block access to the site. On 5ch, posters argued this just amounts to a game of whack-a-mole — shut the site down and it simply pops up somewhere else — and questioned the point of blocking when the site stays viewable from outside Japan even once it’s hidden domestically. Others pushed back, citing a case where action by a foreign ISP actually did make the site unreachable, arguing the blocks do apply some pressure after all. Opinions were split on what the blocking is really meant to achieve.

Oct 29 (Thu), 5:00 AM JST

Asahi Shimbun

It has emerged that Japan’s Ministry of Internal Affairs and Communications asked telecom carriers, via an industry association, to block a site that published personal information purportedly belonging to customers, after a GMO Internet group service suffered unauthorized access.

Source: news.yahoo.co.jp / Original article here

What people said

8AnonymousOct 29, 2026 08:58
Shutting the site down doesn't stop the hacking itself though — does the Ministry even get that?
43AnonymousOct 29, 2026 09:13
Re: #8
Seems fair enough to go after general public access, since that's the whole point of publishing the data in the first place.
9AnonymousOct 29, 2026 08:58
It's probably running on Tor or something anyway, so blocking it is a lost cause.
16AnonymousOct 29, 2026 09:00
Re: #9
When a US provider blocked it, the site actually did become unreachable. So these guys aren't that sophisticated.
13AnonymousOct 29, 2026 09:00
Doesn't this feel kind of pointless? They can just dump it somewhere else. If it starts getting reposted on social media instead, the damage could end up even worse.
51AnonymousOct 29, 2026 09:17
Re: #13
Exactly, that's the risk. I think it could backfire too.
20AnonymousOct 29, 2026 09:02
The moment something feels sketchy, yank the LAN cable immediately — that's a classic move from the early internet generation.
25AnonymousOct 29, 2026 09:03
Re: #20
♪ "Nothing to worry about~" (quoting a well-known kids' show jingle)
39AnonymousOct 29, 2026 09:12
They'll just spin the site up somewhere else again. Is the Ministry going to ask carriers to block it every single time it happens? Real smart move there. This is going to be an endless game of whack-a-mole.
48AnonymousOct 29, 2026 09:17
Re: #39
Throw 150 million yen at it and some overseas hacker will go catch your "weasel" for you. These guys aren't some mythical cryptid that doesn't actually exist.
61AnonymousOct 29, 2026 09:21
Re: #39
It's because if nothing's done, the damage spreads exponentially. Of course a permanent fix gets worked out separately — this is just a stalling tactic for now.
49AnonymousOct 29, 2026 09:17
Quit slacking off in here and go hunt down the culprit yourselves — there's a $1 million reward on offer!
58AnonymousOct 29, 2026 09:20
Re: #49
Even GMO itself can't identify the attacker — how's some random person supposed to? There's no idle hacker just sitting around waiting to do this.
197AnonymousOct 29, 2026 10:09
Re: #49
"You guys" means the people posting in this very thread.
67AnonymousOct 29, 2026 09:22
Re: #61
On what basis would the hacker actually get caught? Lay out the logic.
79AnonymousOct 29, 2026 09:26
Re: #67
That's not even a response to what I said.
83AnonymousOct 29, 2026 09:27
Re: #79
I'm asking you to spell out the logic for why the hacker would get caught. Are you just speaking wishful thinking into the void?
94AnonymousOct 29, 2026 09:30
Re: #79
This level of not getting it… might actually be an AI posting ( ゚д゚)ハッ
101AnonymousOct 29, 2026 09:33
Even if you make it invisible from Japan, if it's still viewable everywhere else in the world, there's no point to begin with. There's also a chance this runs into "secrecy of communications" issues. This panic makes you wonder if plenty of bureaucrats and politicians are among the site's users themselves — normally they couldn't care less when it's some private company's screwup.
107AnonymousOct 29, 2026 09:35
Re: #101
Isn't it a domain suspension? That would make it unreachable worldwide, not just blocked in Japan.
185AnonymousOct 29, 2026 09:59
Re: #173
Then don't reply to me. Oh, and don't reply to this one either.
212AnonymousOct 29, 2026 10:15
Re: #185
Sure thing — give me a shout again whenever you actually feel like discussing Re: #101's point.
132AnonymousOct 29, 2026 09:43
So this is what the "world's strongest white-hat hackers" actually do — slap a bounty on the culprit and beg the government to cut the network? What even is this?
161AnonymousOct 29, 2026 09:50
Re: #132

Actually, that whole "GMO employs over 200 white-hat hackers and has world-class security technology" claim is starting to feel like false advertising worth reporting to the Consumer Affairs Agency.
162AnonymousOct 29, 2026 09:50
Re: #132
That's not really white-hat hacker work, no. But still, having sites taken down one after another is a hassle for the attackers too. If they have to keep standing up that many sites in a cat-and-mouse chase, they're naturally going to leave more footprints behind.

Call it mere harassment if you want, but if your own side's hackers are quietly tracking the attacker's footprints, having the site yanked mid-surveillance is a genuinely annoying wrench in the works.
168AnonymousOct 29, 2026 09:52
I wonder how IT engineers feel watching cyberterrorism run wild like this. Maybe like a mathematician who just watched an AI casually solve the problem of the century?
172AnonymousOct 29, 2026 09:55
Re: #168
About that PHP issue — my older brother was in tears about having to pull an all-nighter fixing it. I texted him back "lol serves you right."
182AnonymousOct 29, 2026 09:59
Re: #168
GMO's case is on a different level from the others, though — apparently the vulnerability was already known and had been flagged beforehand.
186AnonymousOct 29, 2026 10:01
Re: #168
I got out of that line of work a long time ago so it's not my problem anymore, but there have got to be plenty of people out there who want to just die right now. I mean, back in 2000 some well-known trust banks had already been breached, and they hadn't even noticed it was happening. If things were already that bad back then, you can pretty much guess where we stand now.

Personally, the fact that this is only becoming a big deal now feels "way too late" to me. It's just that discovery lagged way behind. My guess is that by around 2024–2025, something like 80% of listed companies have already been hit.
196AnonymousOct 29, 2026 10:09
Is there even any point in just capping it off inside Japan?
206AnonymousOct 29, 2026 10:13
Re: #196
If you want to call it pointless, sure, it's close to pointless, but it does dial back the psychological pressure of "pay up or else" at least a little. Also, if the attackers try to set up on another site while a monitoring team of hackers is watching and trying to trace their identity, forcing them to leave more footprints raises the risk of them getting traced back — in that case it does start to mean something, if a monitoring team is actually working in tandem. Though who knows if such a team is actually deployed.
213AnonymousOct 29, 2026 10:15
Re: #206
If you fed a dedicated AI the command "burn down the rotten hackers' and tokuryu's (ad-hoc, social-media-recruited crime ring) base," wouldn't it just attack nonstop 24/7 and wipe them out? The other side's working by hand, so it'd be a cakewalk lol
219AnonymousOct 29, 2026 10:17
Re: #206
>If you want to call it pointless, sure, it's close to pointless, but it does dial back the psychological pressure of "pay up or else" at least a little.

There's no guarantee the data won't leak even if you pay, to begin with, so it doesn't apply any real pressure — paying isn't even really an option.

With file encryption, at least paying up might actually unlock things and that's that, but these criminals aren't exactly bright either.

Background and Key Issues

Site blocking has precedent in areas like child pornography countermeasures, but the Ministry’s request itself carries no legal force — it operates on telecom carriers voluntarily complying. Because the block only works on domestic connection routes and does nothing to stop the site reappearing via overseas mirrors or a different domain, the structural limitation posters flagged as “whack-a-mole” is hard to avoid under the current system. That said, temporarily cutting off access to the extortion site is seen as aiming to slow the spread of information and raise psychological pressure on the perpetrators. At the time of this report, details such as the scale of the leaked data, how it was discovered, and the legal basis for the blocking request had not been disclosed, so it’s too early to say definitively whether the measure is effective.

*This article is composed from excerpts and a summary of the 5ch (News Express+) thread “GMO Unauthorized Access Extortion Site: Ministry of Internal Affairs Requests Telecoms Force a Block“.

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