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    Netlab 360 Blog

    blog.netlab.360.com · Company blog · on HN since 2016

    Netlab 360 is the security research team of Chinese firm Qihoo 360, which analyzes botnets, backdoors and malware.

    Visit blogHN submissions
    SecurityNetworking
    What HN says

    HN commenters link it as a source on large botnets and for malware analyses of Linux backdoors and trojans.

    Stats for nerds
    27HN people shared it
    26linked in comments
    1.2Kstory points
    Jun 2024last shared
    2018people per year2024

    Top posts on HN

    1. 1
      RotaJakiro: A long live secret backdoor with 0 VT detection
      2 people · 434 points · first shared 2021 · 174 comments on HN
    2. 2
      MikroTik routers are forwarding owners’ traffic to unknown attackers
      1 person · 261 points · first shared 2018 · 145 comments on HN
    3. 3
      Blackrota: obfuscated backdoor written in Go
      1 person · 162 points · first shared 2020 · 25 comments on HN
    4. 4
      A 100k Botnet Turns Home Routers to Email Spammers
      2 people · 159 points · first shared 2018 · 113 comments on HN
    5. 5
      New Mirai Variant Has a Domain Generation Algorithm
      1 person · 64 points · first shared 2016 · 26 comments on HN
    6. 6
      An Analysis of Godlua Backdoor
      4 people · 44 points · first shared 2019 · 5 comments on HN
    7. 7
      B1txor20, a Linux Backdoor Using DNS Tunnel
      3 people · 23 points · first shared 2022 · 5 comments on HN
    8. 8
      Analysis Report of the Facefish Rootkit
      1 person · 4 points · first shared 2021 · Discussion on HN
    9. 9
      Home routers are being hijacked by GhostDNS
      1 person · 3 points · first shared 2018 · Discussion on HN
    10. 10
      Fbot is now riding the traffic and transportation smart devices
      2 people · 2 points · first shared 2021 · Discussion on HN

    What HN people wrote when they linked it

    • fromFeb 2023

      > Chinese just try to destroy and censor. Worked at a company which hosted presentations, one of their 5 million presentations was critical of China. We received over 10,000 phone calls and close to a million emails in two days, and a sustained 10gbps ddos attack for a week.

      Do you have any proof it had to do with the presentation? You're treating "China" as if it was one person.

      > Letting russia and china on the internet was a massive security mistake we should rectify. The world spends literally BILLIONS because chinarussia are frankly assholes online.

      China Unicom IPs trying to guess your root password over SSH is not a cyberwarfare campaign. China regularly takes down botnets (read https://blog.netlab.360.com/). It is a result of a bunch of cheap IoT devices with default passwords.

      > Russisns mostly try to disrupt and steal because thats their foreign policy.

      Great! Now Russians go straight to using a US residential proxy when they commit fraud because they see they are being blocked instead of silently raising their internal risk score or any of the 50 smarter things you could have done.

    • toss1Apr 2021

      Key point:

      >>"kernel maintainers (and maintainers of many other free-software projects) are overworked and do not have the time to properly review every patch that passes through their hands. They are, as a result, forced to rely on the trustworthiness of the developers who submit patches to them. The kernel development process is, arguably, barely sustainable when that trust is well placed; it will not hold together if incoming patches cannot, in general, be trusted. "

      Yet these UMN "researchers" deliberately chose to violate that trust.

      Are they so ethically clueless and arrogant that they didn't think to review the plan? Did they hold any kind of ethical review and pass it, or fail it and decide to proceed anyway?

      In any case, they've now alerted the entire world that the Linux dev process and OS dev processes in general are incredibly vulnerable to malicious actors.

      This vulnerability is also shown by another #1 HN story[1]

      [1] https://blog.netlab.360.com/stealth_rotajakiro_backdoor_en/

    • costcoJan 2024

      I mean it's enough to make at the most a few thousand a month selling residential proxy plans on crime forums. Not really significant. There are orders of magnitude larger botnets (some 100k, 400k+ in size) you can read about on https://blog.netlab.360.com/.

      Edit: I agree it is important to do takedowns. Qakbot, GameOver Zeus, Emotet, Snake, etc all had actual espionage risk / were cumulatively involved in billions of dollars of theft. But this botnet seems sort of irrelevant.

    • rolphMay 2022

      article with some indicators[for now] listed.

      a number of sources seem to agree this is not finished ware, there are some feature stubs in the code.

      alternatively i would also explore the idea that a full featured ware was not paid for so, the basic user tier is in play, rather than B1txor20 premium.

      https://blog.netlab.360.com/b1txor20-use-of-dns-tunneling_en/ has a nice breakdown of the code

    • degenerateNov 2018

      A much better, more thorough analysis, complete with affected router model numbers, graphs, charts, and area affected map are at the source post:

      https://blog.netlab.360.com/bcmpupnp_hunter-a-100k-botnet-turns-home-routers-to-email-spammers-en/

    • arsJun 2024

      https://blog.netlab.360.com/icnanker-trojan-downloader-shc-en/ has:

      cp -f /usr/bin/chattr /usr/bin/lockr

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