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Posts Tagged ‘decryption algorithm’

Another Modified ZeuS Variant Seen in the Wild

17
Oct
2011

In the past, we’ve reported about malware based on the leaked ZeuS code, such as Ice IX, and ZeuS 2.3.2.0, and this usage of the leaked code has continued on since then, and has resulted to attacks such as the one I’m about to share.My colleagues and I have been monitoring another new version of […]

Category General Written by TrendLabs 0 Comments

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Win32/Alureon brings back old school virus techniques, enhanced

16
May
2011

In 1999, a new virus, Win32/Crypto, was discovered. It was using brute-force attacks against its encryption key to decrypt its body. Today, in 2011, variants of Win32/Alureon are bringing this old-school technique back to life, with some extra naughtiness, as you will see below. While working recently on different Win32/Alureon samples, we noticed some behaviour […]

Category General Written by Microsoft Malware Protection Center 0 Comments

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