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Profil korisnika/ce 0xDUDE
Victor Gevers
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@0xDUDE

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Victor Gevers

@0xDUDE

Hacker. 5,729 Responsible Disclosures / Coordinated Vulnerability Disclosures. Researcher at @GDI_FDN. Chair of @DIVDnl

In your LAN
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    1. Victor Gevers‏ @0xDUDE 15. sij
      • Prijavi Tweet

      Since December, @GDI_FDN has reported over 98 thousand vulnerable Citrix Netscalers to their organizations or their ISP and monitoring over 120 thousand servers. The Dutch Security Hotline of @DIVDnl is reporting vulnerable instances in the Netherlands. https://www.securitymeldpunt.nl/2020/01/15/How-to-check-your-Citrix-gateway/ …pic.twitter.com/BOIxMXzkbT

      33 proslijeđena tweeta 58 korisnika označava da im se sviđa
      Prikaži ovu nit
    2. Victor Gevers‏ @0xDUDE 15. sij
      • Prijavi Tweet

      There are roughly 37 thousand Citrix #Shitrix devices online, which are still vulnerable (CVE-2019-19781). In the last 48 hours, we noticed a quick decline of vulnerable devices from 89 thousand to 37 thousand. Just a few more days and this mess could be cleaned up? :-)pic.twitter.com/q1cwMwYOLA

      7 proslijeđenih tweetova 13 korisnika označava da im se sviđa
      Prikaži ovu nit
    3. Victor Gevers‏ @0xDUDE 17. sij
      • Prijavi Tweet

      The amount of vulnerable Citrix #Shitrix endpoints is going down. Our latest scan (made from 13.95.153.127 and 137.117.226.20) detected 17,613 which are still vulnerable. Newly added (honeypot) hosts added after December are ignored.pic.twitter.com/RenUqtbQOk

      GDI Foundation i Dutch Institute for Vulnerability Disclosure
      6 proslijeđenih tweetova 10 korisnika označava da im se sviđa
      Prikaži ovu nit
    4. Victor Gevers‏ @0xDUDE 17. sij
      • Prijavi Tweet

      In about 5 minutes, a new scan to search for vulnerable Citrix #Shitrix endpoints will run again. So if you see 104.45.30.171 touching your Citrix server, then please don't panic. We are the good guys. Have a great weekend! :-)pic.twitter.com/SrTQ6lqI5q

      Dutch Institute for Vulnerability Disclosure i GDI Foundation
      11 proslijeđenih tweetova 23 korisnika označavaju da im se sviđa
      Prikaži ovu nit
    5. Victor Gevers‏ @0xDUDE 17. sij
      • Prijavi Tweet

      The amount of vulnerable Citrix #Shitrix endpoints went down again today. There are 16,466 vulnerable endpoints left. 1,147 endpoints are not vulnerable anymore since yesterday.pic.twitter.com/I0yfUVOUyq

      4 proslijeđena tweeta 17 korisnika označava da im se sviđa
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    6. Victor Gevers‏ @0xDUDE 18. sij
      • Prijavi Tweet

      Today's scan shows that 15,626 Citrix endpoints are still vulnerable.https://docs.google.com/spreadsheets/d/1Uplx-kmEUsYz9n9m0wBuZYqv6lM1TBCFa08vAwX2bJw/edit#gid=0 …

      1 reply 4 proslijeđena tweeta 6 korisnika označava da im se sviđa
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    7. Victor Gevers‏ @0xDUDE 19. sij
      • Prijavi Tweet

      The weekend is over. Today's scan shows there are 15,602 vulnerable Citrix servers online. The amount of honeypots is steadily increasing while the amount of vulnerable servers is going down. https://docs.google.com/spreadsheets/d/1Uplx-kmEUsYz9n9m0wBuZYqv6lM1TBCFa08vAwX2bJw/edit?usp=sharing …pic.twitter.com/1eOkKUvqN1

      Dutch Institute for Vulnerability Disclosure i GDI Foundation
      12 proslijeđenih tweetova 24 korisnika označavaju da im se sviđa
      Prikaži ovu nit
    8. Victor Gevers‏ @0xDUDE 20. sij
      • Prijavi Tweet

      We are still monitoring the progress of the Citrix #CVE201919781 and the mitigation of it. 12 hours ago Citrix published updates and new fixes. Since 10:00 CET there 14,564 vulnerable endpoints online.pic.twitter.com/Yyge63UWV1

      Dutch Institute for Vulnerability Disclosure i GDI Foundation
      1 reply 10 proslijeđenih tweetova 10 korisnika označava da im se sviđa
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    9. Victor Gevers‏ @0xDUDE 20. sij
      • Prijavi Tweet

      17 hours ago, Citrix published updates & new fixes for #CVE201919781. 14,180 are still vulnerable. There are sensitive networks unpatched out there. With only a few volunteers we are trying to help (remotely) these organizations that are behind or stuck in the mitigation process.pic.twitter.com/6OkZ5wt7wS

      9 proslijeđenih tweetova 17 korisnika označava da im se sviđa
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    10. Victor Gevers‏ @0xDUDE 22. sij
      • Prijavi Tweet

      The Dutch Security Hotline of @DIVDnl made a first analysis of the scan data collected on the night of January 9 to 10 shows that of the more than 700 vulnerable Citrix servers identified in the Netherlands, over 450 used wildcard certificates. [1/2] https://www.securitymeldpunt.nl/cases/202002-Wildcard-Certificaten-Citrix-ADC/ …

      1 reply 10 proslijeđenih tweetova 9 korisnika označava da im se sviđa
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      Victor Gevers‏ @0xDUDE 22. sij
      • Prijavi Tweet

      There is a high probability that Citrix ADC servers with no mitigation applied on or after January 9, 2020, have been taken over and their TLS certificates and associated keys have been stolen. [2/2] Please patch AND revoke your certificates.

      04:10 - 22. sij 2020.
      • 11 proslijeđenih tweetova
      • 9 oznaka „sviđa mi se”
      • Manuel Atug * deviantsecurit1 #supportcaboverdeartfreedom Martijn Egberts Hans Meuris Will Dormann Chris van 't Hof 2501_0 😷Bhikshu2007😷 Ron Rattie
      11 proslijeđenih tweetova 9 korisnika označava da im se sviđa
        1. Novi razgovor
        2. Victor Gevers‏ @0xDUDE 22. sij
          • Prijavi Tweet

          Victor Gevers je proslijedio/a tweet korisnika/ceChristopher Glyer

          Indicator of Compromise Scanner for CVE-2019-19781. Autility for detecting compromises of Citrix ADC Appliances.https://twitter.com/cglyer/status/1219984237878763521 …

          Victor Gevers je dodan/na,

          Christopher Glyer @cglyer
          BREAKING - To help organizations identify compromised systems with CVE-2019-19781, @FireEye & @Citrix have released a tool that searches for indicators of compromise associated with attacker activity observed by @Mandiant https://fireeye.com/blog/products-and-services/2020/01/fireeye-and-citrix-tool-scans-for-iocs-related-to-vulnerability.html … https://github.com/fireeye/ioc-scanner-CVE-2019-19781/ …
          Prikaži ovu nit
          1 reply 3 proslijeđena tweeta 4 korisnika označavaju da im se sviđa
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        3. Victor Gevers‏ @0xDUDE 23. sij
          • Prijavi Tweet

          Victor Gevers je proslijedio/a tweet korisnika/ceRobert

          Citrix ADC (NetScaler) Honeypot. Supports detection for CVE-2019-19781 and login attempts. Detects and logs payloads for CVE-2019-19781 (Shitrix / Citrixmash) Logs failed login attempts Serves content and headers taken from a real appliance.https://twitter.com/x1sec/status/1220239529111515136 …

          Victor Gevers je dodan/na,

          Robert @x1sec
          New tool: #citrix ADC / Netscaler honeypot for cve-2019-19781 #shitrix. Serves content taken from a real system for indexing by search engines, e.g. #shodan or google. Will also detect web admin panel login attempts. https://github.com/x1sec/citrix-honeypot … pic.twitter.com/4rs9gkkoCD
          2 proslijeđena tweeta 6 korisnika označava da im se sviđa
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        4. Victor Gevers‏ @0xDUDE 23. sij
          • Prijavi Tweet

          🎵 11,704 Citrix servers with CVE-2019-19781 on the net, 11,704 Citrix servers with CVE-2019-19781. Patch 332 down, Mitigate it around, 11,372 Citrix servers with CVE-2019-19781 on the net... 🎵 https://docs.google.com/spreadsheets/d/1Uplx-kmEUsYz9n9m0wBuZYqv6lM1TBCFa08vAwX2bJw/edit?usp=sharing …pic.twitter.com/12L8PHOekV

          8 proslijeđenih tweetova 15 korisnika označava da im se sviđa
          Prikaži ovu nit
        5. Victor Gevers‏ @0xDUDE 24. sij
          • Prijavi Tweet

          CVE-2012-4606 Citrix XenServer 4.1, 6.0, 5.6 SP2, 5.6 Feature Pack 1, 5.6 Common Criteria, 5.6, 5.5, 5.0, 5.0 Update 3 contains a Local Privilege Escalation Vulnerability which could allow local users with access to a guest OS to gain elevated privileges. https://twitter.com/cvenew/status/1220477594543456257?s=21 …pic.twitter.com/ZO2wJ3Yr0I

          1 reply 6 proslijeđenih tweetova 4 korisnika označavaju da im se sviđa
          Prikaži ovu nit
        6. Victor Gevers‏ @0xDUDE 24. sij
          • Prijavi Tweet

          Victor Gevers je proslijedio/a tweet korisnika/ceCatalin Cimpanu

          https://twitter.com/campuscodi/status/1220711683057995777?s=21 …https://twitter.com/campuscodi/status/1220711683057995777 …

          Victor Gevers je dodan/na,

          Catalin Cimpanu @campuscodi
          NEW: Hackers target unpatched Citrix servers to deploy ransomware * REvil gang attacks confirmed * Maze also suspected * Other groups are selling access to hacked Citrix systems on hacking forums https://www.zdnet.com/article/hackers-target-unpatched-citrix-servers-to-deploy-ransomware/ … pic.twitter.com/3EyWKlIRd2
          1 reply 3 proslijeđena tweeta 3 korisnika označavaju da im se sviđa
          Prikaži ovu nit
        7. Victor Gevers‏ @0xDUDE 24. sij
          • Prijavi Tweet

          Victor Gevers je proslijedio/a tweet korisnika/ceUnder the Breach

          https://twitter.com/underthebreach/status/1220687658701246464?s=21 …https://twitter.com/underthebreach/status/1220687658701246464 …

          Victor Gevers je dodan/na,

          Under the Breach @underthebreach
          I examined the files #REvil posted from http://Gedia.com  after they refused to pay the #ransomware. the interesting thing I discovered is that they obviously hacked Gedia via the #Citrix exploit my bet is that all recent targets were accessed via this exploit. (1/2) pic.twitter.com/tWeUR7I1zj
          Prikaži ovu nit
          1 reply 3 proslijeđena tweeta 1 korisnik označava da mu se sviđa
          Prikaži ovu nit
        8. Victor Gevers‏ @0xDUDE 25. sij
          • Prijavi Tweet

          https://www.bleepingcomputer.com/news/security/citrix-releases-final-patch-as-ransomware-attacks-ramp-up/ …

          1 reply 4 proslijeđena tweeta 9 korisnika označava da im se sviđa
          Prikaži ovu nit
        9. Victor Gevers‏ @0xDUDE 26. sij
          • Prijavi Tweet

          Victor Gevers je proslijedio/a tweet korisnika/ceBleepingComputer

          "Patching the Citrix ADC Bug Doesn't Mean You Weren't Hacked" by @Ionut_Ilascuhttps://twitter.com/BleepinComputer/status/1221455792659947520?s=20 …

          Victor Gevers je dodan/na,

          BleepingComputerOvjeren akaunt @BleepinComputer
          Patching the Citrix ADC Bug Doesn't Mean You Weren't Hacked - by @Ionut_Ilascu https://www.bleepingcomputer.com/news/security/patching-the-citrix-adc-bug-doesnt-mean-you-werent-hacked/ …
          1 reply 2 proslijeđena tweeta 4 korisnika označavaju da im se sviđa
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        10. Victor Gevers‏ @0xDUDE 1. velj
          • Prijavi Tweet

          Detecting Citrix CVE-2019-19781 via @USCERT_gov https://www.us-cert.gov/ncas/alerts/aa20-031a …

          1 reply 1 proslijeđeni tweet 4 korisnika označavaju da im se sviđa
          Prikaži ovu nit
        11. Victor Gevers‏ @0xDUDE 1. velj
          • Prijavi Tweet

          "We checked the Netscaler logs and found no evidence of successful exploitation of the vulnerability. Why are you suggesting to redeploy it with new credentials and new certificates?" This is the/etc/password file of your server. Did you not see this in your log files? RCE =☠️pic.twitter.com/yDJfhXfyLL

          0 replies 0 proslijeđenih tweetova 6 korisnika označava da im se sviđa
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