[Oisf-users] Suricata PCRE Unicode/UTF-8 Matching

carl rizzle rizzlecarl at gmail.com
Tue Jan 22 16:37:29 UTC 2019

I am currently running Suricata-4.0.0 with pcre version 8.42.

I compiled pcre version 8.42 as follows:

./configure --prefix=/usr                     \

            --docdir=/usr/share/doc/pcre-8.42 \

            --enable-unicode-properties       \

            --enable-pcre16                       \

            --enable-pcre32                       \

            --enable-pcregrep-libz              \

            --enable-pcregrep-libbz2          \

            --disable-static                          \

            --enable-pcretest-libreadline     \


...and ran make

Suricata was compiled as follows:

./configure with_libpcre_includes=/root/suricata-4.0.0/pcre-8.42/

...and ran make && make install

My goal is to make a rule that matches on the Chinese character: 投

I created a rule that matches on utf-8 characters (i.e.
pcre:"/\xe6\x8a\95/") as well as utf-16

(i.e. pcre:"/\X{6295}/"). Suricata accepted both rules but none of them
matched the character

that I know is in my sample data. Any Idea if my PCRE expression is
incorrect or if I configured Suricata

incorrectly? Are there other encoding formats that I am missing?

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