This are the last events in the NC13 LOGS
{"reqId":"6433Vnu8l7M4FNuwgqJ4","level":4,"time":"2017-08-20T10:02:09+00:00","remoteAddr":"","user":"--","app":"cron","method":"--","url":"--","message":"Not installed","userAgent":"--","version":""}
{"reqId":"I2eWAnvXcvPkBiHQyifx","level":3,"time":"2017-08-30T11:27:31+00:00","remoteAddr":"62.173.40.229","user":"--","app":"PHP","method":"GET","url":"\/admin\/config.php","message":"Exception: The requested uri(\/admin\/config.php) cannot be processed by the script '\/core\/templates\/404.php') at \/var\/www\/nextcloud\/lib\/private\/AppFramework\/Http\/Request.php#729","userAgent":"curl\/7.21.0 (i486-pc-linux-gnu) libcurl\/7.21.0 OpenSSL\/0.9.8o zlib\/1.2.3.4 libidn\/1.15 libssh2\/1.2.6","version":"12.0.2.0"}
{"reqId":"Vb0iEGD0FEhUBjlM1hIZ","level":4,"time":"2017-08-30T14:34:56+00:00","remoteAddr":"193.136.108.166","user":"ricardo","app":"webdav","method":"PUT","url":"\/remote.php\/webdav\/Mi_Ric\/2017\/08\/2017-08-17a23\/IMG_20170816_170144.jpg","message":"Exception: {\"Exception\":\"Sabre\\\\DAV\\\\Exception\\\\BadRequest\",\"Message\":\"expected filesize 2256363 got 630784\",\"Code\":0,\"Trace\":\"#0 \\\/var\\\/www\\\/nextcloud\\\/apps\\\/dav\\\/lib\\\/Connector\\\/Sabre\\\/Directory.php(151): OCA\\\\DAV\\\\Connector\\\\Sabre\\\\File->put(Resource id #8)\\n#1 \\\/var\\\/www\\\/nextcloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/Server.php(1096): OCA\\\\DAV\\\\Connector\\\\Sabre\\\\Directory->createFile('IMG_20170816_17...', Resource id #8)\\n#2 \\\/var\\\/www\\\/nextcloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/CorePlugin.php(525): Sabre\\\\DAV\\\\Server->createFile('Mi_Ric\\\/2017\\\/08\\\/...', Resource id #8, NULL)\\n#3 [internal function]: Sabre\\\\DAV\\\\CorePlugin->httpPut(Object(Sabre\\\\HTTP\\\\Request), Object(Sabre\\\\HTTP\\\\Response))\\n#4 \\\/var\\\/www\\\/nextcloud\\\/3rdparty\\\/sabre\\\/event\\\/lib\\\/EventEmitterTrait.php(105): call_user_func_array(Array, Array)\\n#5 \\\/var\\\/www\\\/nextcloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/Server.php(479): Sabre\\\\Event\\\\EventEmitter->emit('method:PUT', Array)\\n#6 \\\/var\\\/www\\\/nextcloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/Server.php(254): Sabre\\\\DAV\\\\Server->invokeMethod(Object(Sabre\\\\HTTP\\\\Request), Object(Sabre\\\\HTTP\\\\Response))\\n#7 \\\/var\\\/www\\\/nextcloud\\\/apps\\\/dav\\\/appinfo\\\/v1\\\/webdav.php(71): Sabre\\\\DAV\\\\Server->exec()\\n#8 \\\/var\\\/www\\\/nextcloud\\\/remote.php(162): require_once('\\\/var\\\/www\\\/nextcl...')\\n#9 {main}\",\"File\":\"\\\/var\\\/www\\\/nextcloud\\\/apps\\\/dav\\\/lib\\\/Connector\\\/Sabre\\\/File.php\",\"Line\":151}","userAgent":"Mozilla\/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/60.0.3112.113 Safari\/537.36","version":"12.0.2.0"}
{"reqId":"KuHuVYW1gC2zsNCJVrqR","level":3,"time":"2017-08-30T17:16:19+00:00","remoteAddr":"71.6.202.198","user":"--","app":"PHP","method":"GET","url":"\/xxbb","message":"Exception: The requested uri(\/xxbb) cannot be processed by the script '\/core\/templates\/404.php') at \/var\/www\/nextcloud\/lib\/private\/AppFramework\/Http\/Request.php#729","userAgent":"Mozilla\/5.0 zgrab\/0.x","version":"12.0.2.0"}
{"reqId":"P48A6YrbYcsWrdbb1fgL","level":2,"time":"2017-08-30T18:07:02+00:00","remoteAddr":"193.136.108.166","user":"--","app":"core","method":"POST","url":"\/index.php\/login","message":"Login failed: 'admin' (Remote IP: '193.136.108.166')","userAgent":"Mozilla\/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/60.0.3112.113 Safari\/537.36","version":"12.0.2.0"}
{"reqId":"umjSskRDkkpYU4fT6KBZ","level":2,"time":"2017-08-30T18:07:09+00:00","remoteAddr":"193.136.108.166","user":"--","app":"core","method":"POST","url":"\/index.php\/login?user=admin","message":"Login failed: 'admin' (Remote IP: '193.136.108.166')","userAgent":"Mozilla\/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/60.0.3112.113 Safari\/537.36","version":"12.0.2.0"}
{"reqId":"hD2rvofFWkCLwDYBH2vf","level":2,"time":"2017-08-30T18:07:21+00:00","remoteAddr":"193.136.108.166","user":"--","app":"core","method":"POST","url":"\/index.php\/login?user=admin","message":"Login failed: 'admin' (Remote IP: '193.136.108.166')","userAgent":"Mozilla\/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/60.0.3112.113 Safari\/537.36","version":"12.0.2.0"}
{"reqId":"kSNv6NybeNpbdQ4OzE0l","level":2,"time":"2017-08-30T18:08:01+00:00","remoteAddr":"193.136.108.166","user":"admin","app":"core","method":"GET","url":"\/index.php\/logout?requesttoken=o1VptUb\/yQ9CbZWV19W9276VOr\/GLehIltIgE7kiKgU%3D%3A7y0v8Sm4v3kGPb7d4LSJlNPeV\/2HSr4a7KtKUtEVQUE%3D","message":"Login failed: 'admin' (Remote IP: '193.136.108.166')","userAgent":"Mozilla\/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/60.0.3112.113 Safari\/537.36","version":"12.0.2.0"}