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General security topics

Talk about general security topics, using Censys and other tools to discover and investigate potential threats, and more

13 Topics
M
MrTiTiNew Participant
asked in Threat hunting
Ogre Routing - Hunting for Nodes of Ogre Nodes

Hello! We are trying to map IPs in our address space to OGRE router nodes and TOR nodes. Do you know of any way to investigate this through Censys or do you know of any sources of information related to this?Here are some links on the subject of Ogre Routing, with some similarities to TOR Routing:-https://github.com/NthMetal/ogre-router/blob/master/README.md-https://github.com/NthMetal/ogre-router-server Thanks!

1
MattK_Censys
5 days ago
RachelH_Censys
RachelH_CensysCensys Team
posted in Other security topics
Manufacturing Use Case Queries for Search & ASM

Hi there! Censys recently published a blog about the prevalence of ransomware attacks on manufacturing firms, based on new research from GRF. Within the blog, our team included some manufacturing use case queries you can run in Censys Search and Censys ASM to identify and monitor relevant protocols, like those for building automation, PLC communication, HMI/SCADA, and more. Examples: Building Automation ProtocolsBACnetSearch Query: services.service_name:BACNET ASM Query: host.services.service_name:BACNETHMI/SCADARed Lion CrimsonSearch Query: services.service_name:REDLION_CRIMSON or services.software:(vendor=”Red Lion” and product=”Crimson”) ASM Query: host.services.service_name:REDLION_CRIMSON or host.services.software:(vendor=”Red Lion” and product=”Crimson”) You can check out the full article here: https://censys.com/top-targets-the-impact-of-ransomware-on-manufacturing/

0
RachelH_Censys
12 days ago
MattK_Censys
MattK_CensysCensys Community Manager
posted in Security news
Censys in the news: ICS research covered in Bloomberg

Some of the work our research team has conducted about industrial control systems (ICS) recently got some love in Bloomberg, check it out here!Our team has published an initial blog about the research on our site as well. There’s more we will be able to share about ICS infra later this year - stay tuned!

0
MattK_Censys
1 month ago
HimajaM_Censys
HimajaM_CensysCensys Team
posted in Censys Rapid Response
Measuring the Impact of the DigiCert DCV Bug

We recently dug into the DigiCert Domain Control Verification compliance issue to try and quantify its real-world impact and determine how many public-facing web entities are using an affected certificate. As of two days ago over 26,000 certificates are still active on public websites across ~3.5 million physical and virtual hosts -- although almost 99% of those certs have already been revoked. We also analyzed registered domains to identify the most impacted companies and industries. You can read more about our findings in our blog published yesterday: The DigiCert DCV Bug: Implications and Industry Impact. Organizations have until this Friday at 20:30 UTC to replace these certificates according to DigiCert.If you're looking to find affected certificates, you can use this Censys Search query: labels=digicert-revoked-dcv  and filter on your domains (by appending and services.tls.certificates.leaf_data.names=*.yourdomain.com). Keep in mind that results will continue to roll in over the

0
HimajaM_Censys
1 month ago
MattK_Censys
MattK_CensysCensys Community Manager
posted in Security news
Tracking MOVEit Transfer exposures over time

The Censys Research Team published an article yesterday about new auth bypass vulnerabilities affecting MOVEit Transfer and Gateway products, examining the state of exposed services roughly a year on from publication of a different SQL injection vulnerability associated with MOVEit Transfer.Check out the team’s dashboard exploring exposed MOVEit services over time here and learn more in the article here. The dashboard utilizes this Hosts Search query to identify exposed services: services.software.product: "MOVEit Transfer" and not labels: {tarpit, honeypot, truncated} If you have questions about this research, let us know and we’ll tag in the Censys team!

2
MattK_Censys
1 month ago
M
Matthew Embee ResearchNew Participant
posted in Threat hunting
Sharing Techniques For Hunting Open Directories

Hey All, I recently published a guide to hunting open directories alongside Censys.It dives into ways you can use queries to find open directories with Malware, and shows how you can find things like ransomware files and cobalt strike. If anyone has any questions or needs any guidance trying it out, feel free to post a comment and I’ll help out where I can :) https://censys.com/a-beginners-guide-to-hunting-open-directories/

2
B
1 month ago
AidanH_Censys
AidanH_CensysCensys Team
posted in Threat hunting
Stumbling Upon XehookStealer C2 Instances

While reevaluating the VIPER C2 fingerprint after reading this topic. (Shout out @fopwn)  I started checking the logic of Agniane Stealer which could be discovered with the following query. services: (http.response.favicons.md5_hash="ef05ae61e6cfce0f261635b68bacd524" and http.response.body: "https://t.me/agniane") Historical Virtual Host - Running on Cloudflare We haven’t seen any Agniane Stealer in some time so I decided to look at hosts with the string "https://t[.]me/agniane" in the HTTP body. I got 11 results but none of them were labeled as Agniane Stealer.    However, only one was a raw host that wasn’t behind Cloudflare, 193.149.190[.]2.  Looking at the Markdown preview I am able to see there is a header “xehook.stealer” and the same Telegram channel /agniane. XehookStealer is a piece of known malware as a service infostealer that targets Windows systems. It also uses SmokeLoader binaries for distribution. It has overlapping code with Agniane Stealer, that I now confidently can

2
B
1 month ago
F
fopwnNew Participant
posted in Threat hunting
Hunting VIPER C2 Instances on Censys

man viper-huntHey all, this just serves as a quick way to hunt down some VIPER C2 instances if this is something you’re interested in tracking. I’ve tweeted about this previously so this will be a recap/update with some new hosts. Hunt.io also has a really good blog on their site about hunting on their platform, but I posted my tweet two months before their article so… take that VC investors. IntroductionFor some background, VIPER C2 is a framework primarily used by Asian TAs and is rarely hosted in any NATO/FVEY countries. Using IP geolocation alone can already help narrow down some more interesting hosts to look at without the need for any deep pivoting. A notable APT that has historically used VIPER is NAIKON/Lotus Panda, especially in combination with Asset Reconnaissance Lighthouse. So, how can we track VIPER instances? Very easily, we abuse TA laziness. The Basic PathBased on the Hunt article and maybe some cursory manual glances, you could easily come up with a basic query based

0
F
1 month ago
MorganP_Censys
MorganP_CensysCensys Team
posted in Security news
Recently Issued (probably not) Crowdstrike Certs 👀 🐟

https://search.censys.io/search?resource=certificates&q=crowdstrike+and+ct.entries.va[…]+and+not+parsed.issuer.organization%3D%60CrowdStrike+Inc.%60

1
MorganP_Censys
1 month ago
TheGift73
TheGift73New Participant
asked in Threat hunting
EASM Threat Hunting Best Practices

Hi,I was wondering what is the best way to start doing some External Attack Surface threat hunting for a specific organisation using Censys using the free community account type. Are there good way to start doing this whilst reducing any potential false positives, such as looking for a specific version of PHP seen on a server/machine rather than just PHP as a whole?

1
MattK_Censys
1 month ago
HimajaM_Censys
HimajaM_CensysCensys Team
posted in Censys Rapid Response
Rapid Response Advisory: Exim MTA Bug Could Allow Malicious Email Attachments (CVE-2024-39929)

 This week the Censys Rapid Response team published an advisory on the recently disclosed Exim vulnerability tracked as CVE-2024-39929.In Exim versions through 4.97.1, a bug in the parsing of multiline RFC 2231-encoded headers leads to incomplete parsing of attachment filenames. Remote actors could exploit this to bypass malicious file extension blocking measures and potentially send malicious attachments such as .exe executables undetected to users' email inboxes.This bug is concerning due to how widespread Exim is on public-facing mail servers. Censys identifies around 1.5 million Exim servers online that are potentially vulnerable to this exploit.However, exploiting this vulnerability alone is unlikely to fully compromise a server. Users need to actively click and execute attachments to trigger any embedded malicious code.Check out the post for more information. The team has provided the following Censys queries to track affected devices:Censys Search Query for Potentially Vulnerabl

0
HimajaM_Censys
2 months ago
MattK_Censys
MattK_CensysCensys Community Manager
posted in Censys Rapid Response
Advisory: regreSSHion RCE Vulnerability in OpenSSH Server (CVE-2024-6387)

The Censys rapid response team has released its rapid response advisory on the recently disclosed RCE vulnerability in OpenSSH. Check out the post for full information on exploitation details and potential impact. The team has provided the following queries to use related to this vuln: Censys ASM Risk query: risks.name=”Vulnerable OpenSSH [CVE-2024-6387]” If you have any questions about this vuln or have suggestions for detecting with Censys, leave them here!

0
MattK_Censys
2 months ago
MattK_Censys
MattK_CensysCensys Community Manager
posted in Other security topics
Tracking the TellYouThePass Ransomware Campaign

The recently disclosed CVE-2024-4577 PHP vulnerability has been rapidly weaponized by the TellYouThePass ransomware gang to breach servers and encrypt files since around June 7, 2024. Censys published a live dashboard tracking publicly exposed infected hosts, observing around 1,000 as of June 13, primarily geolocated in China. The Censys Research Team first wrote about this issue in an advisory published on June 10, 2024: https://censys.com/cve-2024-4577/. This latest blog expands upon the evolving exploitation of the vulnerability, the TellYouThePass campaign, and the team’s observations regarding compromised hosts. Read it here.

0
MattK_Censys
2 months ago

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