Feeds

Not your father's spam: Trojan slingers attach badness to attachment WITHIN attachment

Banking baddies in recursive ruse

Choosing a cloud hosting partner with confidence

Cybercrooks are upping the ante by loading malware as an attachment inside another attachment in a bid to slip past security defences.

A new variant of the Upatre Trojan comes bundled in spammed messages that imitate emails from known banks such as Lloyds Bank and Wells Fargo. The .MSG file of the malicious emails contains another .MSG file attached with an attached "ZIP" file.

The ZIP files poses as a password-protected archive containing a "secure message" from the intended victim's bank while in reality containing a variant of the Upatre Trojan.

Opening the "ZIP file" on a Windows machine results in an attempt to infect the machine before a download of a variant of the ZeuS (Zbot) banking Trojan ensues. The Trojan then attempts to snaffle online banking passwords.

Other malware is also downloaded as part of the same attack, specifically the Necurs malware, a well-known strain designed to disable computers’ security features before establishing a backdoor on compromised systems.

Upatre can be likened to a sherpa in the world of cybercrime, setting up a base camp for assaults by other cybercrime tools on weakly secured systems. Previous spam runs of Upatre have been associated with the distribution of the infamous Cryptolocker file-encrypting ransomware threat.

Trend Micro has put together a blog post on the evolution of the Upatre Trojan threat - including a more detailed description of the latest "spam within spam" distribution tactic - in a blog post here. ®

Choosing a cloud hosting partner with confidence

More from The Register

next story
You really need to do some tech support for Aunty Agnes
Free anti-virus software, expires, stops updating and p0wns the world
Privacy bods offer GOV SPY VICTIMS a FREE SPYWARE SNIFFER
Looks for gov malware that evades most antivirus
Patch NOW! Microsoft slings emergency bug fix at Windows admins
Vulnerability promotes lusers to domain overlords ... oops
HACKERS can DELETE SURVEILLANCE DVRS remotely – report
Hikvision devices wide open to hacking, claim securobods
Astro-boffins start opening universe simulation data
Got a supercomputer? Want to simulate a universe? Here you go
State Dept shuts off unclassified email after hack. Classified mail? That's CLASSIFIED
Classified systems 'not affected' - but, is this reconnaissance?
prev story

Whitepapers

Why cloud backup?
Combining the latest advancements in disk-based backup with secure, integrated, cloud technologies offer organizations fast and assured recovery of their critical enterprise data.
Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
How to determine if cloud backup is right for your servers
Two key factors, technical feasibility and TCO economics, that backup and IT operations managers should consider when assessing cloud backup.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Security and trust: The backbone of doing business over the internet
Explores the current state of website security and the contributions Symantec is making to help organizations protect critical data and build trust with customers.