topstack2021a@gmail.com
topstack2021a@gmail.com is an email address
that 4 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), Chollima Hunter and tayvano (lazarus-bluenoroff-research).
The earliest of those reports is dated 2026-08-30 and the most recent 2026-10-18.
The reporting files it under the persona Dan Mao, alongside 22 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.
email address IT Worker Fraud CURATED
Sources
-
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/solcrazy910 — Lazarus Group DPRK IT-Worker Registry (lazarus.group) -
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/0xquantech is account id 92380384, created on 12 October 2021, display name Q, with 110 public repositories. Its repositories hold commits signed with five addresses lazarus.group gives for Dan Mao, blockchainlover2019@gmail.com, ananphoon823@gmail.com, alexwork455@gmail.com, billyrowan1980@gmail.com and topstack2021a@gmail.com, 144 of them in GitHub's search, under the author names blockchainlover2019 and Crazy. In eight of the twelve repositories read they are the only commits, or all but one or two, and they are made in the days after each repository was created: coin-multi-sender, created on 12 March 2023, holds five commits of 12 to 15 March signed ananphoon823@gmail.com, and nothing else. None of the five addresses is registered to a GitHub account, which is why a search on the account's own name finds no commits, and why the account is tied to the persona by what its repositories contain rather than by its login. It is filed beside github.com/solover007, which signs with a sixth Dan Mao address.
github.com/0xquantech — Chollima Hunter -
Found on 24 September 2026 by searching GitHub's commit index for published persona addresses and reading which account GitHub attributes the commits to. GitHub credits a commit to the account that has the signing address registered and verified, which only the holder of the mailbox can do, so an attributed account is one the address's holder controls, whichever repository the commits sit in and whenever the address was added. Counts are of the commits GitHub's search returns, up to 100. GitHub attributes 100 commits signed topstack2021a@gmail.com, an address the lazarus.group registry publishes for this persona, to the login RustBlockchainEngineer, which no longer resolves.
github.com/RustBlockchainEngineer — Chollima Hunter -
…billyrowan1980@gmail.com - blockchainlover2019@gmail.com - maodan466@gmail.com - putnikdeveloperbg@gmail.com - spaceboy00@gmail.com - topstack2021a@gmail.com - 0xquantech - t.me/MaoDan007 (ID: 5089966453) • ([Messages](./user-5089966453-@MaoDan007-Sol Crazy.txt)) #### alek806 aka Aleksandar…
DPRK IT Workers — tayvano (lazarus-bluenoroff-research)
Find this indicator in the index, or see every email address this site holds under Email addresses in the browse listing.
Related indicators
Same persona record: Dan Mao
Cited by the same report: lazarus.group/team/solcrazy910
All 20 indicators from this source