diff --git a/ChangeLog b/ChangeLog
index 1010d6d7..1917f079 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -30,6 +30,7 @@ releases.
     - fixed failregex AMI Asterisk authentification failed (see gh-1302)
     - removed invalid (vulnerable) regex blocking IPs using forign data (from header "from")
       thus not the IP-address that really originates the request (see gh-1927)
+    - fixed failregex for the SQL-injection attempts with single-quotes in connect-string (see gh-2011)
 * filter.d/dovecot.conf:
     - fixed failregex, see gh-1879 (partially cherry-picked from gh-1880)
     - extended to match pam_authenticate failures with "Permission denied" (gh-1897)
diff --git a/config/filter.d/asterisk.conf b/config/filter.d/asterisk.conf
index e94754c0..0cb1b70a 100644
--- a/config/filter.d/asterisk.conf
+++ b/config/filter.d/asterisk.conf
@@ -25,7 +25,7 @@ failregex = ^%(__prefix_line)s%(log_prefix)s Registration from '[^']*' failed fo
             ^%(__prefix_line)s%(log_prefix)s hacking attempt detected '<HOST>'$
             ^%(__prefix_line)s%(log_prefix)s SecurityEvent="(?:FailedACL|InvalidAccountID|ChallengeResponseFailed|InvalidPassword)"(?:(?:,(?!RemoteAddress=)\w+="[^"]*")*|.*?),RemoteAddress="IPV[46]/(UDP|TCP|WS)/<HOST>/\d+"(?:,(?!RemoteAddress=)\w+="[^"]*")*$
             ^%(__prefix_line)s%(log_prefix)s "Rejecting unknown SIP connection from <HOST>"$
-            ^%(__prefix_line)s%(log_prefix)s Request (?:'[^']*' )?from '[^']*' failed for '<HOST>(?::\d+)?'\s\(callid: [^\)]*\) - (?:No matching endpoint found|Not match Endpoint(?: Contact)? ACL|(?:Failed|Error) to authenticate)\s*$
+            ^%(__prefix_line)s%(log_prefix)s Request (?:'[^']*' )?from '(?:[^']*|.*?)' failed for '<HOST>(?::\d+)?'\s\(callid: [^\)]*\) - (?:No matching endpoint found|Not match Endpoint(?: Contact)? ACL|(?:Failed|Error) to authenticate)\s*$
 
 # FreePBX (todo: make optional in v.0.10):
 #            ^(%(__prefix_line)s|\[\]\s*WARNING%(__pid_re)s:?(?:\[C-[\da-f]*\])? )[^:]+: Friendly Scanner from <HOST>$
diff --git a/fail2ban/tests/files/logs/asterisk b/fail2ban/tests/files/logs/asterisk
index 837011e0..0955cfe7 100644
--- a/fail2ban/tests/files/logs/asterisk
+++ b/fail2ban/tests/files/logs/asterisk
@@ -80,9 +80,10 @@ Nov 4 18:30:40 localhost asterisk[32229]: NOTICE[32257]: chan_sip.c:23417 in han
 [2016-05-23 10:18:16] NOTICE[19388] res_pjsip/pjsip_distributor.c: Request from '"1000" <sip:1000@10.0.0.1>' failed for '1.2.3.4:48336' (callid: 276666022) - Failed to authenticate
 # failJSON: { "time": "2016-05-23T10:18:16", "match": true , "host": "1.2.3.4" }
 [2016-05-23 10:18:16] NOTICE[19388] res_pjsip/pjsip_distributor.c: Request from '"1000" <sip:1000@10.0.0.1>' failed for '1.2.3.4:48336' (callid: 276666022) - Error to authenticate
-# Failed authentication with pjsip on Asterisk 13+
 # failJSON: { "time": "2016-06-08T23:40:26", "match": true , "host": "2.3.4.5" }
 [2016-06-08 23:40:26] NOTICE[32497] res_pjsip/pjsip_distributor.c: Request from '"317" <sip:317@1.2.3.4>' failed for '2.3.4.5:5089' (callid: 206f178f-896564cb-57573f49@1.2.3.4) - No matching endpoint found
+# failJSON: { "time": "2017-12-14T22:18:00", "match": true , "host": "1.2.3.4" }
+[2017-12-14 22:18:00] NOTICE[1943] res_pjsip/pjsip_distributor.c: Request 'INVITE' from '<sip:'or''='@4.5.6.7>' failed for '1.2.3.4:43678' (callid: UmOkE9yQPGOsF3Az24YTRe..) - No matching endpoint found
 
 # failJSON: { "time": "2016-06-09T00:01:02", "match": true , "host": "192.0.2.1" }
 [2016-06-09 00:01:02] NOTICE [22382] manager.c: 192.0.2.1 failed to authenticate as 'admin'