`188.43.136.115`

188.43.136.115 is an IP address that 4 published sources report in connection with IT Worker Fraud, unclustered DPRK and Contagious Interview activity, which public reporting attributes to North Korea (DPRK). It is cited here from ReliaQuest, NKInternet and Trend Micro. The earliest of those reports is dated 2025-01-06 and the most recent 2025-07-16.

ip address IT Worker FraudDPRK (cluster unattributed)Contagious Interview MATCHED IN SOURCE

First seen 2025-01-06 · last seen 2025-07-16

Network

Kind	fixed line
Network	TRANS-TELECOM
Announced by	AS20485 Joint Stock Company TransTeleCom
Country	Russia

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

Sources

…the outside world, others likely operate directly from Russia itself. We saw this play out in our investigations when the TTK IP address 188.43.136.115 appeared in logs tied to remote management and monitoring (RMM) sessions, which North Korean workers rely on to access devices located in…
Threat Spotlight: Red Flags for Red Star Hackers: Hunting for North Korean Insiders - ReliaQuest — ReliaQuest · under “Russian TTK ISP” · published 2025-05-08 · pulled 2026-09-01
…as well as some recent sightings of Hangro in the wild. Handshake Failures Across the four IPs 175.45.176.21, 175.45.176.22, 188.43.136.115, and 188.43.136.116 they all share a common certificate on port 7443.…
Hangro: Investigating North Korean VPN Infrastructure Part 2 — NKInternet · under “Handshake Failures” · published 2025-07-16 · pulled 2026-09-12
…These IPs shared certificates on port 3225 and also had port 8888 open: 175.45.176.21 175.45.176.22 188.43.136.115 188.43.136.116 Until November 1, 2024, these IPs displayed the following certificate information on port 3225: Subject:…
Hangro: Investigating North Korean VPN Infrastructure Part 1 — NKInternet · under “Hangro’s IP Infrastructure” · published 2025-01-06 · pulled 2026-09-12
…back to North Korea by North Korean-aligned actors abroad; a related assessment was made here : 175.45.176.21 175.45.176.22 188.43.136.115 188.43.136.116 The Russian IP ranges in Table 1 belong to ASN AS20485, which belongs to TransTelecom in Russia.…
Russian Infrastructure Plays Crucial Role in North Korean Cybercrime Operations — Trend Micro · under “Anonymization layers” · published 2025-04-23 · pulled 2026-09-12

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Cited by the same report: Threat Spotlight: Red Flags for Red Star Hackers: Hunting for North Korean Insiders - ReliaQuest

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