Compromising Citrix ShareFile on-premise via 7 chained vulnerabilities

A while ago we investigated a setup of Citrix ShareFile with an on-premise StorageZone controller. ShareFile is a file sync and sharing solution aimed at enterprises. While there are versions of ShareFile that are fully managed in the cloud, Citrix offers a hybrid version where the data is stored on-premise via StorageZone controllers. This blog … Continue reading Compromising Citrix ShareFile on-premise via 7 chained vulnerabilities →

mitm6 – compromising IPv4 networks via IPv6

While IPv6 adoption is increasing on the internet, company networks that use IPv6 internally are quite rare. However, most companies are unaware that while IPv6 might not be actively in use, all Windows versions since Windows Vista (including server variants) have IPv6 enabled and prefer it over IPv4. In this blog, an attack is presented … Continue reading mitm6 – compromising IPv4 networks via IPv6 →

Lessons learned from a Man-in-the-Middle attack

It’s become a widely accepted mantra that experiencing a cyber breach is a question of ‘when’ and not ‘if’. For Fox-IT ‘if’ became ‘when’ on Tuesday, September 19 2017, when we fell victim to a “Man-in-the-Middle” attack. As a result of the multi-layered security protection, detection and response mechanisms we had in place, the incident … Continue reading Lessons learned from a Man-in-the-Middle attack →

Criminals in a festive mood

This morning the Fox-IT Security Operations Center observed a large number of phishing e-mails that contained a link to a downloadable zip file. Anyone downloading and opening that zip file would infect themselves with banking malware, that would subsequently try to lure the victim into divulging their credit card information. So far nothing new: e-mail … Continue reading Criminals in a festive mood →

Further abusing the badPwdCount attribute

Researched and written by Rindert Kramer Introduction At Fox-IT, we often do internal penetration tests for our customers. One of the attacks that we perform is password spraying. In a password spraying attack the attacker tries to authenticate as one of the user accounts that is found in Active Directory using a common password. These … Continue reading Further abusing the badPwdCount attribute →

Fox-IT debunks report on ByLock app that landed 75,000 people in jail in Turkey

The Turkish government has been actively pursuing the prosecution of the participants of the Gülen movement in what it calls “the Fetullahist Terrorist Organization/Parallel State Structure (FETÖ/PDY)”. To this end, the Turkey’s National Intelligence Organization (Millî İstihbarat Teşkilatı or MİT in Turkish) has investigated the relation of a publicly available smart phone messaging application called … Continue reading Fox-IT debunks report on ByLock app that landed 75,000 people in jail in Turkey →

FAQ on the WanaCry ransomware outbreak

Last updated: May 16th 2017 A ransomware variant known as WanaCry/WanaCrypt0r has spread on a massive scale around the world since the 12th of May 2017. For more information about the context with regards to this WanaCry variant, see also our earlier blog. The section below outlines the frequently asked questions and corresponding answers. Q: … Continue reading FAQ on the WanaCry ransomware outbreak →