`135.125.255.55`

135.125.255.55 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. The reports are dated 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
`0x47a397d9d459b05433f0d579e7842442b348ec38`	Etherscan	Contract, ethereum	mapping contract	EtherRAT	2026-03-02	2026-03-02
`0x4f1dd066b832af641b5f08537a5b0fc0b329d5ec`	Etherscan	Wallet, ethereum	owner wallet	EtherRAT	2026-03-02	2026-03-02
`0x1a3f8e013c392d8cf6ca5049ee7f437b383f27e1`	Etherscan	Contract, ethereum	mapping contract	EtherRAT	2026-01-03	2026-01-03
`0x3372a63ee825d09b4daee979513980f99c731db5`	Etherscan	Wallet, ethereum	owner wallet	EtherRAT	2026-01-03	2026-01-03

ip address EtherHiding / UNC5342DPRK (cluster unattributed) CURATED

First seen 2026-04-14 · last seen 2026-04-14

Network

Kind	data centre
Network	OVH SAS (Gutnik Oleksandr)
Announced by	AS16276 OVH SAS
Country	Germany
Flags	hosting range

Looked up 2026-10-04 at ip-api.com. A hosting range is not evidence on its own.

Sources

As printed:

http://135.125.255.55

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 2026-01-03, last seen 2026-03-02, 3 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
As printed:

… had fallback C2 IP hardcoded inside the RAT logic to use when smart contract was unresponsive. This C2 IP was the same as first value set for smart contract from this oldest sample (http[://]135.125.255.55).

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 2026-01-03, last seen 2026-03-02, 3 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 distribution: spoofing administrative tools via GitHub facades — Atos Threat Research Center · published 2026-04-14 · pulled 2026-10-03
…This C2 IP was the same as first value set for smart contract from this oldest sample (http[://]135.125.255.55). Simplified Stage 3 graph ( link to detailed) Decentralized C2 Infrastructure The campaign implements a decentralized C2 model…
EtherRAT distribution spoofing administrative tools via GitHub facades — Atos Threat Research Center · under “STAGE 3 – RAT” · published 2026-04-14 · pulled 2026-10-03

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