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Malware Analysis
Video: .NETReactor deobfuscation and configuration extraction of AgentTesla
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<blockquote data-quote="struppigel" data-source="post: 1064943" data-attributes="member: 86910"><p>This is the sample that we unpacked in the previous episode. It is obfuscated with .NETReactor. We use Shed to obtain decrypted strings and get an idea of what it is doing. Removing the obfuscation with NetReactorSlayer does not work out of the box. Is there a way we make it work to obtain the configuration values?</p><p></p><p>Tools: DnSpy, Shed, PortexAnalyzer, SystemInformer, NetReactorSlayer</p><p></p><p>00:00 Intro</p><p>00:25 Strings and DnSpy</p><p>03:37 Shed - decrypted string extraction</p><p>07:46 NetReactorSlayer first attempt</p><p>10:39 NetReactorSlayer second attempt</p><p>13:00 Config decoding</p><p></p><p>[MEDIA=youtube]3t9BEdA4ch8[/MEDIA]</p></blockquote><p></p>
[QUOTE="struppigel, post: 1064943, member: 86910"] This is the sample that we unpacked in the previous episode. It is obfuscated with .NETReactor. We use Shed to obtain decrypted strings and get an idea of what it is doing. Removing the obfuscation with NetReactorSlayer does not work out of the box. Is there a way we make it work to obtain the configuration values? Tools: DnSpy, Shed, PortexAnalyzer, SystemInformer, NetReactorSlayer 00:00 Intro 00:25 Strings and DnSpy 03:37 Shed - decrypted string extraction 07:46 NetReactorSlayer first attempt 10:39 NetReactorSlayer second attempt 13:00 Config decoding [MEDIA=youtube]3t9BEdA4ch8[/MEDIA] [/QUOTE]
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