Showing posts with label javascript. Show all posts
Showing posts with label javascript. Show all posts

Tuesday, September 12, 2017

Warhorse Botnet and Attack Framework

In August 2017, Wapack Labs uncovered a new botnet leveraging a recently released attack framework dubbed "Warhorse". The bots were observed delivering the GlobeImposter malware to numerous targets including those in the government, military, telecommunications, and energy sectors. Javascript downloaders such as Warhorse have become a popular delivery mechanism for multiple malware campaigns. The speed by which Warhorse was adopted by cyber criminals is notable with the campaign described in this report taking place only a few days after the project appeared on Github. While Warhorse currently has an above average detection ratio on VirusTotal, it is still undetected by several major anti-virus vendors. Furthermore, since it is likely that the delivery infrastructure is part of a larger botnet then there is a high probability the bots are being leveraged in other attacks. This report provides an early warning on this new botnet and details on the Warhorse attack framework...READ MORE

Wapack Labs has cataloged and reported extensively on botnets and malware in the past. An archive of related reporting can be found in the Red Sky Alliance portal.

Wednesday, February 15, 2017

Google Blocks .js Files


Google has long restricted Gmail file attachments ending in: .exe, .msc, and .bat for security reasons. On Monday 13 February 2017, they added blocking for .js file attachments. A JS file is mainly used to run “client side” JavaScript code on a webpage. Javascript downloaders can be used by criminals to download and execute malicious payloads such as Citadel and TeslaCrypt.

Wapack Labs has reported on JavaScript Downloaders in the past. An archive of related reporting can be found in the Red Sky Alliance Portal.

The following organizations were cited in this report: Google

TLP: AMBER
ACTOR TYPE: (I&II)
SERIAL: TR-034-2017
COUNTRIES: XZ
INDUSTRIES: ALL
REPORT DATE: 20170214