`https://github.com/jcking89`

https://github.com/jcking89 is a GitHub account that one published source reports in connection with IT Worker Fraud activity, which public reporting attributes to North Korea (DPRK). It is cited here from Chollima Hunter. The report is 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.

github profile IT Worker Fraud CURATED live checked 2026-09-30

First seen 2026-09-24 · last seen 2026-09-24

live checked 2026-09-30

The image is the avatar this account displays, not evidence of who operates it.

Source

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 · under “Ryuhei Matsuda” · pulled 2026-09-24

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Account analysis

Account created	2018-07-04
Repositories	40 original, 49 forked
History older than the account	0 repositories
Commits copied into others' repositories	0
Commit identities	0 addresses, 0 names

From gh-fake-analyzer 1.0.2, the Ketman Project's GitHub analysis tool, run on 2026-10-04. These are signals: backdated history and several commit identities are common among ordinary developers too, and an account that shows none of them is not thereby cleared.

Related indicators

Same persona record: Ryuhei Matsuda

Other identifiers the reporting files under the same persona; 8 of 17 are shown.

All 17 on the Ryuhei Matsuda page

Cited by the same report: github.com/jcking89

Chollima Hunter lists 1 other indicator in this source.