Unpacking a laZzzy Donut
ID: ca49f742-4e10-59a6-9e79-b2f0e82e32cf
STIX ID: report--ca49f742-4e10-59a6-9e79-b2f0e82e32cf
Feed Name: TrustedSec blog
This report details analysis of a sophisticated multi-stage malware loader: obfuscated Python bytecode that decodes RC4-encrypted shellcode, a first Donut-generated shellcode layer, a laZzzy PE loader that uses AES-CBC plus XOR to encrypt an embedded shellcode, a second Donut layer producing a .NET DLL, and encrypted .NET resources executed in memory; the author describes static extraction techniques, tool modifications, and a custom lazzzy_dump extractor to recover and decrypt all stages.
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