Entries by Daniel Goldberg

Escalating Insider Threats Using VMware’s API

VMware vSphere is the most widely used virtualization platform for on-premises data centers. Similarly to other virtualization platforms, it basically relies on host servers running guest machines. These hosts and guest machines can be managed using administration interfaces such as vSphere API and VIX API. The GuardiCore Labs team has discovered a vulnerability in the vSphere infrastructure that can be exploited using VMware’s Virtual Infrastructure eXtension (VIX) API. This vulnerability allows an attacker to remotely execute code on guest machines, bypassing the need for guest authentication.

SambaCry, the Seven Year Old Samba Vulnerability, is the Next Big Threat (for now)

The Samba team released a patch on May 24 for a critical remote code execution vulnerability in Samba, the most popular file sharing service for all Linux systems. Samba is commonly included as a basic system service on other Unix-based operating systems as well.
This vulnerability, indexed CVE-2017-7494, enables a malicious attacker with valid write access to a file share to upload and execute an arbitrary binary file which will run with Samba permissions.

Detecting and Mitigating WannaCry and Its Copycats Using GuardiCore Centra Platform

Attack overview WannaCry and its copycat attacks work by exploiting the Microsoft Windows SMB Server critical vulnerability (MS17-010). Patched Windows machines are safe while any unpatched Windows machine is at risk. The WannaCry campaign threatens internet facing as well as internal networks, since a compromised laptop/server in the network will try to propagate and infect […]

The Bondnet Army: Questions & Answers

Last week we announced the discovery of Bondnet, a new botnet that was uncovered by GuardiCore Labs. The originator of Bondnet had installed a cryptocurrency miner and backdoor in thousands of servers of varying power and conscripted them into a botnet – a group of computing devices that can be centrally controlled for malicious purposes.

The Bondnet Army

GuardiCore Labs has recently picked up Bondnet, a botnet of thousands of compromised servers of varying power. Managed and controlled remotely, the Bondnet is currently used to mine different cryptocurrencies and is ready to be weaponized immediately for other purposes such as mounting DDoS attacks as shown by the Mirai Botnet. Among the botnet’s victims are high profile global companies, universities, city councils and other public institutions.

The Oracle of Delphi Will Steal Your Credentials

It was one of those warm summer nights, no clouds, just a bright full moon lighting the way. Someone had unknowingly stumbled upon our honeypot, completely unaware of the fact that her every move was recorded and fully analyzed. Thanks to our deception technology, we could easily reroute the attacker, making her believe she reached her real target.

Infection Monkey Is on the Loose!

Today we are releasing the Infection Monkey, our inhouse tool for testing a data center’s resiliency to perimeter breaches and internal server infection. The Infection Monkey is a new open source security testing tool that we’ve developed at GuardiCore to test the resiliency of modern data centers to attack. Being good sports, we are sharing it with the security community. Just pick a random machine, release the Infection Monkey and see where it ends up. Use our Monkey to test whether your security systems can detect, stop and contain real threats. The monkey is benign and does not pose any risk to your network.

The PhotoMiner Campaign

Over the past few months, we’ve been following a new type of worm we named PhotoMiner. PhotoMiner features a unique infection mechanism, reaching endpoints by infecting websites hosted on FTP servers while making money by mining Monero. The choice of a lesser known currency with a good exchange rate allows the attackers to rapidly gain money while the sophisticated use of safeguards makes it resilient to most disruption attempts, potentially leaving victims infected for years.

Learning from NSA’s Master Hacker

“The big question you need to think about is if you have an intrusion somewhere in your network, can you then defend against this lateral movement?” – Rob Joyce, Chief of the TAO Rob Joyce, head of the NSA’s Tailored Access Operations (TAO) elite division, recently spoke to a large audience at the Usenix Enigma security […]

Illegal Mining, the Cyber Version

Illegal mining is a serious problem in the real world. Lately, it has also become popular with cyber attackers who manage to mine digital currency through untargeted attacks. Untargeted attacks are a common problem, not as attention grabbing as APTs, but still responsible for a large percentage of attacks. In this post, using Guardicore’s Data Center […]