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Old Malware Tricks To Bypass Detection in the Age of Big Data

13
Apr
2017

 

Kaspersky Lab has been tracking a targeted attack actor’s activities in Japan and South Korea recently. This attacker has been using the XXMM malware toolkit, which was named after an original project path revealed through a pdb string inside the file: “C:\Users\123\documents\visual studio 2010\Projects\xxmm2\Release\test2.pdb”. We came across an unusual technique used by a sample which contained no pdb strings but was very similar to a variant of XXMM malware in terms of code similarity, malware functionality, crypto-algorithm, data structures and module configuration.

The malware sample we observed was named “srvhost.exe” to resemble a standard system process name.

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