`mastluner.club`

mastluner.club is a domain that 2 published sources report in connection with EtherHiding / UNC5342 and unclustered DPRK activity, which public reporting attributes to North Korea (DPRK). It is cited here from Chollima Hunter (on-chain observation) and Sysdig. The reports are dated 2026-10-03.

On-chain links

EtherHiding addresses that pointed malware at this host, newest first. Dates are when the value was written on-chain, and Transaction opens the one that first wrote it; a row without one is a tie a cited report states. See the EtherHiding Tracker.

Address	Transaction	Type	Role	Malware family	First written	Last written
`0x3f35e6fbe1098f0685137ab81189e891939825af`	Etherscan	Contract, ethereum	mapping contract	EtherRAT	2026-03-11	2026-03-11
`0xbfafba01a34aa6d53adcd1eac5ff5a7ee38a40ad`	Etherscan	Wallet, ethereum	owner wallet	EtherRAT	2026-03-11	2026-03-11

domain EtherHiding / UNC5342DPRK (cluster unattributed) CURATED

First seen 2026-10-03 · last seen 2026-10-03

Registration

Registered	2026-03-11
Registrar	Global Domain Group LLC
Expires	2027-03-11
Last changed	2026-09-26
Status	client transfer prohibited

From the registry’s RDAP record for mastluner.club, looked up 2026-10-05.

Sources

Value written to the EtherRAT resolver contract 0x3f35e6fbe1098f0685137ab81189e891939825af by operator wallet 0xbfafba01a34aa6d53adcd1eac5ff5a7ee38a40ad on 2026-03-11, as recorded in the contract's setString events. This is an on-chain observation by this site, not a value carried in published reporting. The contract was found by its identical bytecode and setString event to published EtherRAT resolvers (keccak256 of runtime code 484c7fb94d7084807bf4385d4c7fe9bd768ecb92669c162fac9ab299b28f302e). RDAP shows the domain registered on 2026-03-11, the day it was written, through Global Domain Group LLC with nameservers ns2.globaldomaingroup.com and ns1.globaldomaingroup.com. The registration pattern, not the name, is what separates this from the parked and compromised-site values operators also write. The label rests on Sysdig's attribution of the EtherRAT family; one deployment of the family (The DFIR Report) ended in The Gentlemen ransomware with no nation-state named, so this entry carries low confidence and is not itself a DPRK attribution.
EtherRAT resolver contract 0x3f35e6fbe1098f0685137ab81189e891939825af — Chollima Hunter (on-chain observation) · pulled 2026-10-03
Value written to the EtherRAT resolver contract 0x3f35e6fbe1098f0685137ab81189e891939825af by operator wallet 0xbfafba01a34aa6d53adcd1eac5ff5a7ee38a40ad on 2026-03-11, as recorded in the contract's setString events. This is an on-chain observation by this site, not a value carried in published reporting. The contract was found by its identical bytecode and setString event to published EtherRAT resolvers (keccak256 of runtime code 484c7fb94d7084807bf4385d4c7fe9bd768ecb92669c162fac9ab299b28f302e). RDAP shows the domain registered on 2026-03-11, the day it was written, through Global Domain Group LLC with nameservers ns2.globaldomaingroup.com and ns1.globaldomaingroup.com. The registration pattern, not the name, is what separates this from the parked and compromised-site values operators also write. The label rests on Sysdig's attribution of the EtherRAT family; one deployment of the family (The DFIR Report) ended in The Gentlemen ransomware with no nation-state named, so this entry carries low confidence and is not itself a DPRK attribution.
EtherRAT: DPRK uses novel Ethereum implant in React2Shell attacks — Sysdig · pulled 2026-10-03

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Cited by the same report: EtherRAT: DPRK uses novel Ethereum implant in React2Shell attacks

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