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The State of Financial Trojans: 2013
Which Revealed that over 1400 financial institutions have been targeted and compromised millions of computers around the world and the mostly targeted banks were based in the USA with 71.5% of all analyzed Trojans.
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Two Dominant attack strategies are:
* Focus attack: This approach suits attackers with limited resources but also scales well to larger operations. if the distribution is accurate and the target institution has a sizeable client base, a focused attack can provide and adequate supply of targets. Shylock, Bebloh and Tilon all use this approach exclusively.
* Broad Strokes: In this attack strategy, Trojans are set to target large numbers of institutions. Tilon, Cridex, and Gameover adopt these tactics and Zeus also uses this approach in its default configuration.