Ged,

When did clamav start scanning iso files?  
I just tried this and found a eicar.txt file, so yes it does work.

For email, I always just blocked iso extensions.  Still doesn’t like MacOS cdr 
extensions, but a great improvement.

Sincerely,

Eric Tykwinski

> On Jan 14, 2022, at 6:21 PM, G.W. Haywood via clamav-users 
> <[email protected]> wrote:
> 
> Hi there,
> 
> On Fri, 14 Jan 2022, Kris Deugau wrote:
> 
>> I've just come across a presumed-malicious .zip file of about 500K that 
>> contains a ~315M ISO image, which in turn appears to contain a ~315M 
>> executable file.
>> 
>> After a bit of searching and testing I see the --max-ratio option has been 
>> removed from clamscan, and ArchiveMaxCompressionRatio in clamd.conf has been 
>> deprecated.
>> 
>> Are there any remaining (or new?) options that might help flag 
>> hypercompressed files like this?
> 
> If you're using clamd, perhaps try the AlertExceedsMax option together
> with the MaxScanSize and/or MaxFileSize options.  No it's not the same. :/
> 
> Did this arrive in mail, Kris?
> 
> -- 
> 
> 73,
> Ged.
> 
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