Jiro Matsumoto

Also reported as: codeninja819

A fabricated professional identity used in the DPRK remote IT-worker scheme. Everything below was filed under the heading “Jiro Matsumoto / codeninja819” by the report that documented it.

IT Worker Fraud First reported 2026-08-30 · last reported 2026-10-18

LinkedIn accounts

codeninja819

removed checked 2026-09-21

Indicator page: https://www.linkedin.com/in/codeninja819/

linkedin profile IT Worker Fraud MATCHED IN SOURCE removed checked 2026-09-21

Listed as codeninja819

First seen 2026-08-30 · last seen 2026-10-18

Source

…Jiro Matsumoto / codeninja819 - Tokyo, JP - codeninja819 - jiromatsumoto98@gmail.com - linkedin.com/in/codeninja819 - github.com/codeninja819 - t.me/codeninja819_eth (ID: 6418622184) • ([Messages](./user-6418622184-@codeninja819_eth.txt)) -…
DPRK IT Workers — tayvano (lazarus-bluenoroff-research) · under “Jiro Matsumoto / codeninja819” · published 2025-06-19 · pulled 2026-08-30

Identifiers reported alongside

5 indicators filed under the same heading, each with its sources.

Indicator	Type	Account status
`https://calendly.com/codeninja819`	calendly account	not checked
`jiromatsumoto98@gmail.com`	email address	—
`https://github.com/codeninja819`	github profile	live checked 2026-08-30
`https://linktr.ee/codeninja819`	linktree account	not checked
`https://t.me/codeninja819_eth`	telegram account	not checked

`https://calendly.com/codeninja819`

calendly account IT Worker Fraud MATCHED IN SOURCE

Listed as codeninja819

First seen 2026-09-27 · last seen 2026-10-18

Source

…- t.me/codeninja819_eth (ID: 6418622184) • ([Messages](./user-6418622184-@codeninja819_eth.txt)) - x.com/codeninja819 - calendly.com/codeninja819 - stackoverflow.com/users/21336694/codeninja819 - linktr.ee/codeninja819 - ![](./X_2025-11-22_codeninja819.jpg) -…
DPRK IT Workers — tayvano (lazarus-bluenoroff-research) · under “Jiro Matsumoto / codeninja819” · published 2025-06-19 · pulled 2026-09-27

`jiromatsumoto98@gmail.com`

email address IT Worker Fraud MATCHED IN SOURCE

First seen 2026-08-30 · last seen 2026-10-18

Source

…0xapp123 ![](./X_2025-11-22_0xapp123.jpg) #### Jiro Matsumoto / codeninja819 - Tokyo, JP - codeninja819 - jiromatsumoto98@gmail.com - linkedin.com/in/codeninja819 - github.com/codeninja819 - t.me/codeninja819_eth (ID: 6418622184) •…
DPRK IT Workers — tayvano (lazarus-bluenoroff-research) · under “Jiro Matsumoto / codeninja819” · published 2025-06-19 · pulled 2026-08-30

`https://github.com/codeninja819`

github profile IT Worker Fraud MATCHED IN SOURCE live checked 2026-08-30

Listed as codeninja819

First seen 2026-08-30 · last seen 2026-10-18

live checked 2026-08-30

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

Source

…Jiro Matsumoto / codeninja819 - Tokyo, JP - codeninja819 - jiromatsumoto98@gmail.com - linkedin.com/in/codeninja819 - github.com/codeninja819 - t.me/codeninja819_eth (ID: 6418622184) • ([Messages](./user-6418622184-@codeninja819_eth.txt)) - x.com/codeninja819 -…
DPRK IT Workers — tayvano (lazarus-bluenoroff-research) · under “Jiro Matsumoto / codeninja819” · published 2025-06-19 · pulled 2026-08-30

`https://linktr.ee/codeninja819`

linktree account IT Worker Fraud MATCHED IN SOURCE live checked 2026-11-08

Listed as codeninja819

First seen 2026-09-27 · last seen 2026-10-18

live checked 2026-11-08

Source

…x.com/codeninja819 - calendly.com/codeninja819 - stackoverflow.com/users/21336694/codeninja819 - linktr.ee/codeninja819 - ![](./X_2025-11-22_codeninja819.jpg) - ![](./X_2026-04-06_codeninja819.png) #### krippsat - ![](./X_2025-11-22_krippsat.jpg) ####…
DPRK IT Workers — tayvano (lazarus-bluenoroff-research) · under “Jiro Matsumoto / codeninja819” · published 2025-06-19 · pulled 2026-09-27

`https://t.me/codeninja819_eth`

telegram account IT Worker Fraud MATCHED IN SOURCE live checked 2026-11-08

Listed as codeninja819_eth

First seen 2026-09-01 · last seen 2026-10-18

live checked 2026-11-08

Source

…/ codeninja819 - Tokyo, JP - codeninja819 - jiromatsumoto98@gmail.com - linkedin.com/in/codeninja819 - github.com/codeninja819 - t.me/codeninja819_eth (ID: 6418622184) • ([Messages](./user-6418622184-@codeninja819_eth.txt)) - x.com/codeninja819 - calendly.com/codeninja819 -…
DPRK IT Workers — tayvano (lazarus-bluenoroff-research) · under “Jiro Matsumoto / codeninja819” · published 2025-06-19 · pulled 2026-09-01

Sources

DPRK IT Workers — tayvano (lazarus-bluenoroff-research) · under “Jiro Matsumoto / codeninja819” · published 2025-06-19 · pulled 2026-09-27

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