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pcap file containing cryptcat conversation

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I have a pcap file of a cryptcat conversation and also i have the key, but whatever i try i have no success decrypt the conversation. Can u help me?

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3RO
asked 2020-04-28 06:34:55 +0000
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What have you tried so far?

Jaap's avatar Jaap (2020-04-28 06:55:26 +0000) edit
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Taking the tcp stream (as hexdump) and trying to decrypt it, but it's really the twofish encryption of the msg, it seems like it has another layer of encryption.

Twofish encryption results in a nice string (similar to base 64..)

3RO's avatar 3RO (2020-04-28 07:48:09 +0000) edit
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Thank you very much, I think it'll do

3RO's avatar 3RO (2020-04-28 08:38:22 +0000) edit
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You'll have to have a look at the cryptcat source code (to be found on SourceForge) to see how they bolted on encryption to the netcat stream. If you want to do it the hard way you're looking at cryptanalysis, which is somewhat out of scope for this Q&A site.

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Jaap
answered 2020-04-28 08:30:02 +0000
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