Keylogging Trojan uses unique attack
Deutsche Bank trials show effectiveness of unhelpful browser helper object at stealing data
An alert has been issued for a new Trojan that uses a unique method of sneaking past network administrators and corporate firewalls.
The Trojan arrives as an attachment and pretends to be an Internet Explorer Browser Helper Object (BHO). It includes keylogging software that is activated when the user visits certain web sites, typically banking and login in screens.
What makes this Trojan unique is the method it uses to send this information back. Traditionally keyloggers send back recorded information as email or HTTP POST but increasingly these types of transmissions are being watched for by security software.
Instead the Trojan encrypts its data using a XOR algorithm and then builds an Internet Control Message Protocol (ICMP) ping packet, which looks like legitimate network traffic. Internet Control Message Protocol (ICMP) ping packets are typically used to check connection speeds and deliver error messages.
"The method of network transport used by the attacker makes this Trojan unique," said internet monitoring company Websense in its alert.
"To network administrators and egress filters, this ICMP packet looks like legitimate traffic leaving the network. The attackers presumably capture this packet at their remote server, where the packet is easily decoded to reveal the information entered by the user."
BCDR buyer's guide for MSPs
How to choose a business continuity and disaster recovery solutionDownload now
The definitive guide to IT security
Protecting your MSP and your customersDownload now
Cost of a data breach report 2020
Find out what factors help mitigate breach costsDownload now
The complete guide to changing your phone system provider
Optimise your phone system for better business resultsDownload now