104.168.137.21

104.168.137.21 is an IP address that 4 published sources report in connection with APT38, Lazarus Group and unclustered DPRK activity, which public reporting attributes to North Korea (DPRK). It is cited here from Hunt.io, Validin, SlowMist and UN Security Council Panel of Experts (1718 Committee). The earliest of those reports is dated 2023-12-06 and the most recent 2024-07-15.

ip address APT38Lazarus GroupDPRK (cluster unattributed) MATCHED IN SOURCE

First seen 2023-12-06 · last seen 2024-07-15

Network

Kinddata centre
NetworkHostPapa
Announced byAS54290 HostPapa
CountryUnited States
Flagshosting range

Looked up 2026-09-21 at ip-api.com. A hosting range is not evidence on its own.

Sources

  • …on these servers. Note: A complete list of domains will be provided at the end of this post. Figure 8: Snippet of domain history for 104.168.137.21 Figure 9: Domain history for 104.168.163.124 Another possible indicator I noticed when looking into this small infrastructure cluster is…
    Phishing by Appointment: Suspected North Korean Hackers Target Blockchain Community Via Telegram — Hunt.io · under “Infrastructure Analysis” · published 2024-02-28 · pulled 2026-09-12
  • …Pivots from DNS History The subdomains for roomconnect.online (and not the apex domain) used two IP addresses before June 2024: 104.168.137.21 104.168.203.159 Subdomain DNS history shows two distinct periods of activity for this domain. More recently, after a gap…
    Hunting Lazarus: Expanding Indicators with Historic DNS — Validin · under “Building Initial Pivots from DNS History” · published 2024-07-15 · pulled 2026-09-12
  • …attack methods on November 30, 2023: Press enter or click to view image in full size Basic Indicators of Compromise (IOC): IP: 104.168.137.21 Domains: Press enter or click to view image in full size Malicious Attack Examples Press enter or click to view image in full…
    Analysis of North Korean Hackers’ Targeted Phishing Scams on Telegram — SlowMist · under “Background” · published 2023-12-06 · pulled 2026-09-12
  • …o Subsequent investigation determined that malicious IP address 104.168.137.21 had gained unauthorized access to the victim’s computer to effect the heist, and that the script had resulted in all of the victim’s…
    access — UN Security Council Panel of Experts (1718 Committee) · published 2024-03-19 · pulled 2026-09-18

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Related indicators

Cited by the same report: Phishing by Appointment: Suspected North Korean Hackers Target Blockchain Community Via Telegram

Hunt.io lists 4 other indicators in this source.

Cited by the same report: Hunting Lazarus: Expanding Indicators with Historic DNS

Validin lists 7 other indicators in this source.

Disclaimer An entry here is not proof of DPRK affiliation or wrongdoing. A listed name, account or address may belong to an uninvolved person, so each entry is a lead to verify independently. What inclusion means. See the sourcing methodology.