Ryuhei Matsuda
Ryuhei Matsuda is an alias
that 6 published sources report
in connection with IT Worker Fraud activity, which public reporting
attributes to North Korea (DPRK).
It is cited here from Lazarus Group DPRK IT-Worker Registry (lazarus.group) and Chollima Hunter.
The reports are dated 2026-09-24.
The reporting files it under the persona Ryuhei Matsuda, alongside 17 other identifiers attributed to the same identity. The persona page shows them together with any accounts, photographs and CV recorded under that name. A persona name is the one an account presented under, and may belong to an uninvolved person whose identity was taken.
alias IT Worker Fraud CURATED
Sources
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Entry in the lazarus.group DPRK IT-worker registry, which asserts that these accounts belong to one operator. The registry publishes no methodology, so this is recorded as its claim and not as a finding of this site. Its evidence links and its cross-references to other operators in the same registry are deliberately not reproduced as indicators.
lazarus.group/team/ryuhei-matsuda — Lazarus Group DPRK IT-Worker Registry (lazarus.group) -
Found on 13 September 2026 by probing every account handle this site already holds for this operator against GitLab, and read from the profile cited. An active GitLab account exists under ryuheimat, a login the index already carries for this persona on another platform. The profile gives a member-since date of 11 September 2018. It displays the name Ryuhei Matsuda, the same name the reporting already gives. The handle is what links this account to the rest; nothing here establishes that one person holds both, and a display name on a profile is a name the account presents, not an identification. The profile's bio, location and links render only in a browser and were not read, so nothing is claimed about them either way.
gitlab.com/ryuheimat — Chollima Hunter -
Found on 17 September 2026 by asking Keybase whether an account exists under ryuheimat, one of the logins the registry already holds for this operator, and read from the profile cited. The account states a registration date of 17 May 2022 and no display name but the handle itself. The handle is what links this account to the rest; nothing here establishes that one person holds both, and a display name on a profile is a name the account presents, not an identification.
keybase.io/ryuheimat — Chollima Hunter -
Found on 17 September 2026 by asking Docker Hub whether an account exists under ryuheimat, one of the logins the registry already holds for this operator, and read from the profile cited. The account states a registration date of 11 July 2018. The handle is what links this account to the rest; nothing here establishes that one person holds both, and a display name on a profile is a name the account presents, not an identification.
hub.docker.com/u/ryuheimat — Chollima Hunter -
Found on 18 September 2026 by taking the local part of an address this index already holds for this operator -- ryuheimat3 -- and asking GitLab whether an account exists under it. The address is on a consumer mail host, where the local part is a login the holder chose rather than one an employer assigned; handles taken from company addresses were excluded from this pass for that reason. The account states a display name of Ryuhei Matsuda. The display name is kept here rather than carried as an alias, because it restates the handle, describes the work, or is too bare to be a name. The login is what links this account to the rest; nothing here establishes that one person holds both, and a display name on a profile is a name the account presents, not an identification.
gitlab.com/ryuheimat3 — Chollima Hunter -
Found on 24 September 2026 by searching GitHub's commit index for every personal address the lazarus.group registry gives for a persona, and keeping the accounts whose own repositories are committed with one. GitHub mints a noreply address from an account's immutable numeric id, in the form id+handle@users.noreply.github.com, so former handles below are a matter of record. github.com/jcking89 is account id 40835770, created on 4 July 2018, with 89 public repositories. Forty-nine commits in nineteen of them are signed ryuheimat3@gmail.com, an address lazarus.group and tayvano give for Ryuhei Matsuda, which GitHub attributes to github.com/ryuheimat, the account both list for the persona. They carry the author names ryuheimat, Ryuhei Matsuda, ryuhei and r2moon and are made on the day each repository was created, from cryptoExchange on 6 January 2021 and LendBorrow on 3 June 2021 to simple-univ3-integration on 6 July 2023; in all but one of the repositories read they are the only commits. An account whose repositories are opened with the persona's identity, over two and a half years, is the persona's second account or one it has push access to.
github.com/jcking89 — Chollima Hunter
Find this indicator in the index, or see every alias this site holds under Aliases in the browse listing.
Related indicators
Same persona record: Ryuhei Matsuda
All 17 on the Ryuhei Matsuda page
Cited by the same report: lazarus.group/team/ryuhei-matsuda
All 11 indicators from this source