Microsoft Malware Protection Center

Threat Research & Response Blog

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  • Blog Post: Malware packer integrates with UPX

    Recently while I was analyzing a bunch of samples packed by custom packers, one of them struck me as a bit different than any others I saw before. At first glance, the outer layer of packing is a UPX stub, which is commonly used in malware. Especially when combined with a custom packer, UPX can provide...