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Showing posts with the label security

Decryption and Analysis of a "Shell" Backdoor

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UPDATE [l] : shortly after finishing this post, I had decided to do a couple scans of the raw code. The results returned several Shell Trojan variants, and doing some permanent damage to windows systems. Reports available at ] VirusTotal ] and [ Malwr ]. Thanks to both services for the great results. It attempted network connx with the original url, not surprise from a webshell, IMO, only a bit strange that the likely 0wn/Op would keep such a trophy case in the wild like that? I mean really??. I would've expected an http request or few since nce that's who was hosting the assets but the requests were made to connect to "Hostthshellcode and then starts the endless streaming of the v1c's data and a continual stream of fresh code for the mal to swap out. This only confirmed the feeling I had about the src code. Multiple langs being used, illogical syntax and it's all just mixed together... if anyone can answer how this can support the back and forth exec using Perl,...

Various 'must have' Online Tools for Sec, pt 1

There are two updates to this post, (seen in white )... UPDATE : another good online static malware analysis tool we all know and love, is back up and running. Based on the Cuckoo Sandbox: ~]  Malwr.com  [~ There's many tricks and trade secrets that we (or anyone within cybersec) just don't share. We have decided that there are just some online tools just too good to keep a secret. If they do, they arent around for long, a kind of respect thing. I have another shortlist of very handy online tools at the bottom of our most recent reversing and analysis ~] decoding a malicious webshell  [~ . These play a big part in our processes and used several times daily. Some of these below you may be familiar with, or not, or maybe even use already. If not, you should commit these to memory. Trust us, these will always come in handy. This is only a shortlist, we will add more/update as appropriate. The first you hopefully are quite familiar with, if you are not using this rel...