Tag DNS

InfoSec Week 7, 2018

The Fidelis Cybersecurity researcher Jason Reaves demonstrated how covertly exchange data using X.509 digital certificates. The proof of concept code is using SubjectKeyIdentifier and generating certificates on the fly.
https://www.fidelissecurity.com/threatgeek/2018/02/exposing-x509-vulnerabilities

The "UDPoS" Point of Sale malware is using DNS traffic to exfiltrate stolen credit card data.
https://blogs.forcepoint.com/security-labs/udpos-exfiltrating-credit-card-data-dns

Talos analyzed malware threat targeting Olympic computer systems during the opening ceremony. The main purpose was information gathering and destroying the system.
http://blog.talosintelligence.com/2018/02/olympic-destroyer.html

Zero-day vulnerability in the Bitmessage messaging client was exploited to steal Electrum cryptocurrency wallet keys.
https://securityaffairs.co/wordpress/69100/hacking/bitmessage-zero-day.html

Trustwave analyzed multi-stage Microsoft Word attack which is NOT using macros. Really creative technique.
https://www.trustwave.com/Resources/SpiderLabs-Blog/Multi-Stage-Email-Word-Attack-without-Macros/

Microsoft can't fix Skype privilege escalation bug without the massive code rewrite, so they postponed it for a while.
http://seclists.org/fulldisclosure/2018/Feb/33

Facebook is advertising their Onavo VPN application, but there are a few reasons why it is really not a good idea to use it.
https://gizmodo.com/do-not-i-repeat-do-not-download-onavo-facebook-s-vam-1822937825

Facebook is spamming users via SMS registered for two factor authentication (2FA). Then posts their responses on a wall.
https://twitter.com/Gabriel__Lewis/status/963121814166630400

(Not only) Performance analysis of a Retpoline mitigation for Spectre vulnerability.
https://cyber.wtf/2018/02/13/in-debt-to-retpoline/

A guide on how to brutefoce Linux Full Disk Encryption (LUKS) volumes using Hashcat software.
https://blog.pnb.io/2018/02/bruteforcing-linux-full-disk-encryption.html

Proof of concept of LibreOffice remote arbitrary file disclosure vulnerability. It is possible to silently send any files. All operating systems affected before 5.4.5/6.0.1 versions.
https://github.com/jollheef/libreoffice-remote-arbitrary-file-disclosure

InfoSec Week 3, 2018

Notoriously known Necurs spam botnet is sending millions of spam emails that are pumping shitcoin cryptocurrency named Swisscoin. Attackers are probably invested and are expecting to do pump-and-dump scheme.
https://www.bleepingcomputer.com/news/cryptocurrency/worlds-largest-spam-botnet-is-pumping-and-dumping-an-obscure-cryptocurrency/

Nice article on Russia's hacking capabilities against the foreign critical infrastructure.
https://www.fastcompany.com/40515682/the-other-scary-foreign-hacking-threat-trump-is-ignoring

Taiwanese police has handed malware-infected USB sticks as prizes for cybersecurity quiz. The malware was some old sample trying to communicate with non-existing C&C server in Poland. The thumb drives were infected by third-party contractor.
https://www.theregister.co.uk/AMP/2018/01/10/taiwanese_police_malware/

New research is analyzing usage of the Certificate Authority Authorization (CAA) DNS records. CAA records enable domain owners to explicitly tell which certificate authority may issue digital certificates for their domain. Only 4 of the large DNS operators that dominate the Internet’s DNS infrastructure enabled their customers to configure CAA records, but things are getting better after this audit.
https://caastudy.github.io/

Lenovo engineers have discovered a backdoor affecting RackSwitch and BladeCenter switches running ENOS (Enterprise Network Operating System). The company already released firmware updates.
The backdoor was added to the source code in 2004 when it was maintained by Nortel.
https://www.bleepingcomputer.com/news/security/lenovo-discovers-and-removes-backdoor-in-networking-switches/

Nice technical report about PowerStager, Python / C / PowerShell malware used in the Pyeongchang Olympic themed spear phishing attack.
https://researchcenter.paloaltonetworks.com/2018/01/unit42-powerstager-analysis/

InfoSec Week 17, 2017

A team of researchers from New York University said they identified a severe flaw in General Electric Multilin protection relays, which are widely deployed in the US energy sector.
https://www.blackhat.com/us-17/briefings.html#and-then-the-script-kiddie-said-let-there-be-no-light.-are-cyber-attacks-on-the-power-grid-limited-to-nation-state-actors

Kaspersky labs analyzed Backdoor.Win32.Denis, malware using DNS tunneling as a communication infrastructure. Base64 is not an encryption, tough.
https://securelist.com/blog/research/78203/use-of-dns-tunneling-for-cc-communications/

Check Point researchers have discovered a new Mac malware family that uses nag screens to obtain admin privileges, Tor to hide traffic diverted to a remote proxy, and a rogue certificate to intercept encrypted browser traffic. It's spreading via email spam.
http://blog.checkpoint.com/2017/04/27/osx-malware-catching-wants-read-https-traffic/

A critical vulnerability (CVE 2017-5135) in the implementation of the SNMP protocol allows an attacker to take over at least 78 cable modem models.
https://www.bleepingcomputer.com/news/security/several-cable-modem-models-affected-by-snmp-god-mode-flaw/

Wired wrote about the research of Android applications that turns the smartphone into a file server, exposing open ports to the internet, and why is it dangerous. https://www.wired.com/2017/04/obscure-app-flaw-creates-backdoors-millions-smartphones/

CIAs document tracking program Scribbles allegedly embeds a web beacon-style tag into watermarks located on Microsoft Word documents that can report document analytics back to the CIA.
https://wikileaks.org/vault7/#Scribbles

The Antminer, bitcoin mining hardware, has a backdoor that can disable miner remotely. http://www.antbleed.com/ https://www.reddit.com/r/Bitcoin/comments/67qwqv/antbleed_exposing_the_malicious_backdoor_on/dgsk6cf/

Troy Hunt published blog about some of the most insane password reset schemes, security questions, and corporate responses he saw through the career.
https://www.troyhunt.com/reckon-youve-seen-some-stupid-security-things-here-hold-my-beer/