Category Archives: Tutorial

Introducing PE_unmapper

Recently I wrote a small tool, that can be used as a helper in malware analysis. Various malware types unpack their core modules in memory, load them and run. In order to unpack them fast, we can let the malware … Continue reading

Posted in Malware, Tools, Tutorial | Tagged , | 1 Comment

How to turn a DLL into a standalone EXE

During malware analysis we can often encounter payloads in form of DLLs. Analyzing them dynamically may not be very handy, because they need some external loaders to run. Different researchers have different tricks to deal with them. In this post … Continue reading

Posted in Malware, Techniques, Tutorial | 11 Comments

Unpacking NSIS-based Crypter – part 2

After publishing my short tutorial about unpacking NSIS-based crypter I got one more sample from a reader who complained that my method doesn’t work – so I decided to take a look inside. Of course cybercriminals continuously work on improving … Continue reading

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Unpacking NSIS-based Crypter – step by step

Nowadays we can encounter many malware samples packed by a crypter using installer scripts. We can distinguish them by a NSIS tag on Virus Total: Often, (but not always) they come with a standard NSIS icon: In this tutorial, I … Continue reading

Posted in Malware, Tutorial | 12 Comments