I presume you're asking how to get the string of 9 bytes that string represents.

$x =~ tr/://d;
my $y = pack('H*', $x);
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my $y = pack('H*', $x =~ tr/://dr);  # 5.14+ required
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(my $y = $x) =~ s/([0-9a-fA-F]{2}):?/chr(hex($1))/eg;
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my $y = $x =~ s/([0-9a-fA-F]{2}):?/chr(hex($1))/egr;  # 5.14+ required
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my $y = pack 'C*', map hex, split /:/, $x;
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my $y = join '', map chr hex, split /:/, $x;
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