`91.215.85.42`

91.215.85.42 is an IP address 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 Atos Threat Research Center and Sysdig. The earliest of those reports is dated 2025-12-16 and the most recent 2026-04-14.

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
`0x22f96d61cf118efabc7c5bf3384734fad2f6ead4`	Etherscan	Contract, ethereum	mapping contract	EtherRAT	2025-12-05	2025-12-08
`0xe941a9b283006f5163ee6b01c1f23aa5951c4c8d`	Etherscan	Wallet, ethereum	owner wallet	EtherRAT	2025-12-05	2025-12-08

ip address EtherHiding / UNC5342DPRK (cluster unattributed) CURATED

First seen 2025-12-16 · last seen 2026-04-14

Network

Kind	fixed line
Network	Prospero OOO
Announced by	AS200593 PROSPERO OOO
Country	Russia

Looked up 2026-09-21 at ip-api.com. A subscriber line, as a person working from home ordinarily has.

Sources

As printed:

http://91.215.85.42:3000

Notes:

Address that appeared as a value written to EtherRAT resolver contracts, per Atos's list of domains and addresses found in contract events (first seen 2025-12-05, last seen 2025-12-08, 4 occurrences). A value an operator writes to the contract is the address the implant is sent to, but this site has not observed the host serving anything. Atos names no actor of its own: it repeats Sysdig's link between EtherRAT and the DPRK Contagious Interview tooling and notes code overlap with a tool eSentire attributed to an Iranian group, so this entry is filed under the unattributed DPRK label.
EtherRAT-appendixes (IoCs/wallets_and_contracts.csv) — Atos Threat Research Center · published 2026-04-14 · pulled 2026-10-03
…nine state changes over three days: Timestamp (UTC) Block C2 URL Notes 2025-12-05 19:19 23,948,771 http://91.215.85.42:3000 Initial C2 2025-12-06 16:53 23,955,140 http://173.249.8.102/ Secondary server 2025-12-06 16:54 23,955,143…
EtherRAT dissected: How a React2Shell implant delivers 5 payloads through blockchain C2 — Sysdig · under “C2 URL change history” · published 2025-12-16 · pulled 2026-09-12

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Cited by the same report: EtherRAT-appendixes (IoCs/wallets_and_contracts.csv)

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