A bot with debug mode enabled?

Hey guys,

this is just a little curiosity. I can see this kind of lines in my Apache logs since a very long time (more than a year) a few times a week, but can't find anything concrete about when googling the phrases.

It is a SMF spam bot trying to register on a webcomic's forums, and bouncing away due to a custom question/response captcha on the registration page.

It seems to be then sending a request containing a log of its actions, bizarrely.

Have anyone seen this before and could point me towards some information?

(This is errorlog, not accesslog, thus "File does not exist" instead of 404.)

File does not exist: /var/www/redactedbyOP.tld/forum/index.php+++++++++++++++++++++++Result:+chosen+nickname+"Henbloneerabe";+ReCaptcha+decoded;+registered+(registering+only+mode+is+ON);

File does not exist: /var/www/redactedbyOP.tld/forum/index.php++++++++++++++++++++++++++++++++++++++Result:+unknown+type+of+text+captcha,+add+it+in+textcaptcha.txt;+ReCaptcha+decoded;+no+post+sending+forms+are+found;

File does not exist: /var/www/redactedbyOP.tld/forum/index.php++++++++++++++++++++++++++++++++++++++Result:+used+self-learning+system+data;+unknown+type+of+text+captcha,+add+it+in+textcaptcha.txt;+ReCaptcha+decoded;+no+post+sending+forms+are+found;

File does not exist: /var/www/redactedbyOP.tld/forum/index.php++++++++++++++++++++++++++++++++++++++Result:+using+proxy+190.97.204.37:3128;+GET-timeouts+1;+unknown+type+of+text+captcha,+add+it+in+textcaptcha.txt;+ReCaptcha+decoded;+no+post+sending+forms+are+found;

File does not exist: /var/www/redactedbyOP.tld/forum/index.php++++++++++++++++++++++++++++++++++++++Result:+\xed\xe5\xe8\xe7\xe2\xe5\xf1\xf2\xed\xfb\xe9+\xf2\xe8\xef+\xf2\xe5\xea\xf1\xf2\xee\xe2\xee\xe9+\xe7\xe0\xf9\xe8\xf2\xfb,+\xe4\xee\xe1\xe0\xe2\xfc\xf2\xe5+\xe2+textcaptcha.txt;+ReCaptcha+\xe4\xe5\xf8\xe8\xf4\xf0\xee\xe2\xe0\xed\xe0;+\xed\xe5+\xed\xe0\xf8\xeb\xee\xf1\xfc+\xf4\xee\xf0\xec\xfb+\xe4\xeb\xff+\xee\xf2\xef\xf0\xe0\xe2\xea\xe8;

File does not exist: /var/www/redactedbyOP.tld/forum/index.php++++++++++++++++++++++++++++++++++++++Result:+\xed\xe5\xe8\xe7\xe2\xe5\xf1\xf2\xed\xfb\xe9+\xf2\xe8\xef+\xf2\xe5\xea\xf1\xf2\xee\xe2\xee\xe9+\xe7\xe0\xf9\xe8\xf2\xfb,+\xe4\xee\xe1\xe0\xe2\xfc\xf2\xe5+\xe2+textcaptcha.txt;+\xf0\xe0\xf1\xef\xee\xe7\xed\xe0\xe2\xe0\xed\xe8\xe5+ReCaptcha+\xee\xf2\xea\xeb\xfe\xf7\xe5\xed\xee;+\xed\xe5+\xed\xe0\xf8\xeb\xee\xf1\xfc+\xf4\xee\xf0\xec\xfb+\xe4\xeb\xff+\xee\xf2\xef\xf0\xe0\xe2\xea\xe8;

File does not exist: /var/www/redactedbyOP.tld/forum/+++++++++++++++++++++++++++++++++++++++++++++++Result:+unknown+type+of+text+captcha,+add+it+in+textcaptcha.txt;+ReCaptcha+decoded;+no+post+sending+forms+are+found;

File does not exist: /var/www/redactedbyOP.tld/forum/+++++++++++++++++++++++++++++++++++++++++++++++Result:+unknown+type+of+text+captcha,+add+it+in+textcaptcha.txt;+ReCaptcha+decoding+is+disable;+no+post+sending+forms+are+found;

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