渗透测试中SMB服务漏洞检查checklist

安恒网络空间安全讲武堂

发布于 2019-09-27 19:42:29

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发布于 2019-09-27 19:42:29

来源： https://0xdf.gitlab.io/2018/12/02/pwk-notes-smb-enumeration-checklist-update1.html#list-shares 由于我上个月一直在使用PWK / OSCP，在这个过程中，我注意到渗透SMB服务是一件很棘手的事情，不同的工具在不同的主机上有的失败有的成功。通过参考NetSecFocus发布的一些内容，我整理了一份在渗透测试中扫描SMB服务漏洞的检查列表。我将在每个部分中包含示例，但在我使用PWK实验室的地方，我会按照规则对数据进行脱敏展示。

清单
工具
细节
枚举主机名 - nmblookup
扫描共享 - smbmap - smbclient - NMAP
检查空会话 - smbmap - rpcclient - smbclient
检查漏洞 - NMAP
整体扫描 - enum4linux
手动检查
Samba服务 - Windows

检查清单

枚举主机名 - nmblookup -A [ip]
列出共享文件

smbmap -H [ip/hostname]
echo exit | smbclient -L \\\\[ip]
nmap --script smb-enum-shares -p 139,445 [ip]

检查空会话

smbmap -H [ip/hostname]
rpcclient -U "" -N [ip]
smbclient \\\\[ip]\\[share name]

检查漏洞

nmap --script smb-vuln* -p 139,445 [ip]

整体扫描

enum4linux -a [ip]

手动检查

smbver.sh [IP] (port) [samba]
- 检查pcap

工具

nmblookup - 收集用于查找NetBIOS名称的TCP / IP客户端上的NetBIOS信息
smbclient - 一个类似于ftp的客户端，用于访问SMB共享
nmap - 通用的扫描工具，自带检查脚本
rpcclient - 执行客户端MS-RPC功能的工具
enum4linux - 枚举各种smb功能
wireshark

操作细节

枚举主机名

nmblookup

nmblookup -A [IP]
    -A - 按IP地址查找

使用示例：


    root@kali:~# nmblookup -A [ip]
    Looking up status of [ip]
        [hostname]      <00> -         M <ACTIVE>
        [hostname]      <20> -         M <ACTIVE>
        WORKGROUP       <00> - <GROUP> M <ACTIVE>
        WORKGROUP       <1e> - <GROUP> M <ACTIVE>
                       <03> -         M <ACTIVE>
        INet~Services   <1c> - <GROUP> M <ACTIVE>
        IS~[hostname]   <00> -         M <ACTIVE>
        MAC Address = 00-50-56-XX-XX-XX

扫描共享

smbmap

smbmap -H [ip/hostname]

此命令将显示主机上的共享以及你拥有的访问权限。使用示例：

root@kali:/# smbmap -H [ip]
[+] Finding open SMB ports....
[+] User SMB session establishd on [ip]...
[+] IP: [ip]:445        Name: [ip]                                      
        Disk                                                    Permissions
        ----                                                    -----------
        ADMIN$                                                  NO ACCESS
        C$                                                      NO ACCESS
        IPC$                                                    NO ACCESS
        NETLOGON                                                NO ACCESS
        Replication                                             READ ONLY
        SYSVOL                                                  NO ACCESS

如果你获得了登录凭据，则可以重新运行来显示新访问权限：

root@kali:/# smbmap -H [ip] -d [domain] -u [user] -p [password]
    [+] Finding open SMB ports....
    [+] User SMB session establishd on [ip]...
    [+] IP: [ip]:445        Name: [ip]                                      
            Disk                                                    Permissions
            ----                                                    -----------
            ADMIN$                                                  NO ACCESS
            C$                                                      NO ACCESS
            IPC$                                                    NO ACCESS
            NETLOGON                                                READ ONLY
            Replication                                             READ ONLY
            SYSVOL                                                  READ ONLY

smbclient

echo exit | smbclient -L \\\\[ip]

exit会处理可能弹出的任何密码请求，因为我们正在检查null登录

-L - 获取给定主机的共享列表

使用示例：

root@kali:~# smbclient -L \\[ip]
Enter WORKGROUP\root's password:
        Sharename       Type      Comment
        ---------       ----      -------
        IPC$            IPC       Remote IPC
        share           Disk
        wwwroot         Disk
        ADMIN$          Disk      Remote Admin
        C$              Disk      Default share
Reconnecting with SMB1 for workgroup listing.
        Server               Comment
        ---------            -------
        Workgroup            Master
        ---------            -------

NMAP

nmap --script smb-enum-shares -p 139,445 [ip]
--script smb-enum-shares - 指定smb枚举脚本
-p 139,445 - 指定smb端口

使用示例：

root@kali:~# nmap --script smb-enum-shares -p 139,445 [ip]
    Starting Nmap 7.70 ( https://nmap.org ) at 2018-09-27 16:25 EDT
    Nmap scan report for [ip]
    Host is up (0.037s latency).
    PORT    STATE SERVICE
    139/tcp open  netbios-ssn
    445/tcp open  microsoft-ds
    MAC Address: 00:50:56:XX:XX:XX (VMware)
    Host script results:
    | smb-enum-shares:
    |   account_used: guest
    |   \\[ip]\ADMIN$:
    |     Type: STYPE_DISKTREE_HIDDEN
    |     Comment: Remote Admin
    |     Anonymous access: <none>
    |     Current user access: <none>
    |   \\[ip]\C$:
    |     Type: STYPE_DISKTREE_HIDDEN
    |     Comment: Default share
    |     Anonymous access: <none>
    |     Current user access: <none>
    |   \\[ip]\IPC$:
    |     Type: STYPE_IPC_HIDDEN
    |     Comment: Remote IPC
    |     Anonymous access: READ
    |     Current user access: READ/WRITE
    |   \\[ip]\share:
    |     Type: STYPE_DISKTREE
    |     Comment:
    |     Anonymous access: <none>
    |     Current user access: READ/WRITE
    |   \\[ip]\wwwroot:
    |     Type: STYPE_DISKTREE
    |     Comment:
    |     Anonymous access: <none>
    |_    Current user access: READ
    Nmap done: 1 IP address (1 host up) scanned in 10.93 seconds

检查空会话

smbmap

smbmap -H [ip/hostname]

将显示你可以使用给定凭据执行的操作（如果没有凭据，则显示空会话）。请参阅上一节中的示例。

rpcclient

rpcclient -U "" -N [ip]
-U "" -空会话
-N -没有密码

使用示例：

root@kali:~# rpcclient -U "" -N [ip]
rpcclient $>

之后，你可以运行rpc命令。

smbclient
smbclient \\\\[ip]\\[share name]

此命令会尝试连接到共享。包括尝试无密码（或发送空密码），这仍然有可能连接成功。使用示例：

root@kali:~/pwk/lab/public# smbclient \\\\[ip]\\share
Enter WORKGROUP\root's password:
Try "help" to get a list of possible commands.
smb: \> ls
.                                   D        0  Thu Sep 27 16:26:00 2018
..                                  D        0  Thu Sep 27 16:26:00 2018
New Folder (9)                      D        0  Sun Dec 13 05:26:59 2015
New Folder - 6                      D        0  Sun Dec 13 06:55:42 2015
Shortcut to New Folder (2).lnk      A      420  Sun Dec 13 05:24:51 2015
1690825 blocks of size 2048. 794699 blocks available

检查漏洞

NMAP

nmap --script smb-vuln* -p 139,445 [ip]

--script smb-vuln* - 将运行所有smb漏洞扫描脚本 -p 139,445 - smb端口使用示例：

root@kali:~# nmap --script smb-vuln* -p 139,445 [ip]
        Starting Nmap 7.70 ( https://nmap.org ) at 2018-09-27 16:37 EDT
        Nmap scan report for [ip]
        Host is up (0.030s latency).
        PORT    STATE SERVICE
        139/tcp open  netbios-ssn
        445/tcp open  microsoft-ds
        MAC Address: 00:50:56:XX:XX:XX (VMware)
        Host script results:
        | smb-vuln-ms06-025:
        |   VULNERABLE:
        |   RRAS Memory Corruption vulnerability (MS06-025)
        |     State: VULNERABLE
        |     IDs:  CVE:CVE-2006-2370
        |           A buffer overflow vulnerability in the Routing and Remote Access service (RRAS) in Microsoft Windows 2000 SP4, XP SP1
        |           and SP2, and Server 2003 SP1 and earlier allows remote unauthenticated or authenticated attackers to
        |           execute arbitrary code via certain crafted "RPC related requests" aka the "RRAS Memory Corruption Vulnerability."
        |
        |     Disclosure date: 2006-6-27
        |     References:
        |       https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2370
        |_      https://technet.microsoft.com/en-us/library/security/ms06-025.aspx
        |_smb-vuln-ms10-054: false
        |_smb-vuln-ms10-061: false
        | smb-vuln-ms17-010:
        |   VULNERABLE:
        |   Remote Code Execution vulnerability in Microsoft SMBv1 servers (ms17-010)
        |     State: VULNERABLE
        |     IDs:  CVE:CVE-2017-0143
        |     Risk factor: HIGH
        |       A critical remote code execution vulnerability exists in Microsoft SMBv1
        |        servers (ms17-010).
        |
        |     Disclosure date: 2017-03-14
        |     References:
        |       https://technet.microsoft.com/en-us/library/security/ms17-010.aspx
        |       https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0143
        |_      https://blogs.technet.microsoft.com/msrc/2017/05/12/customer-guidance-for-wannacrypt-attacks/
        |_smb-vuln-regsvc-dos: ERROR: Script execution failed (use -d to debug)
        Nmap done: 1 IP address (1 host up) scanned in 5.58 seconds

整体扫描

enum4linux

enum4linux -a [ip]

-a - 枚举所有使用示例的输出很长，但要查找一些要点：

输出类似于nmblookup
- 检查空会话
共享文件
- 密码策略
- RID循环输出
- 域名信息

手动检查

samba ngrep是一个很好用的网络数据工具。在一个终端中运行

ngrep -i -d tap0 's.?a.?m.?b.?a.*[[:digit:]]' port 139

然后在另一个终端中运行

echo exit | smbclient -L [IP]

将丢弃包括版本在内的大量信息。在PWK论坛上的rewardone发布了一个简洁的脚本来轻松获得Samba版本：

#!/bin/sh
#Author: rewardone
#Description:
# Requires root or enough permissions to use tcpdump
# Will listen for the first 7 packets of a null login
# and grab the SMB Version
#Notes:
# Will sometimes not capture or will print multiple
# lines. May need to run a second time for success.
if [ -z $1 ]; then echo "Usage: ./smbver.sh RHOST {RPORT}" && exit; else rhost=$1; fi
if [ ! -z $2 ]; then rport=$2; else rport=139; fi
tcpdump -s0 -n -i tap0 src $rhost and port $rport -A -c 7 2>/dev/null | grep -i "samba\|s.a.m" | tr -d '.' | grep -oP 'UnixSamba.*[0-9a-z]' | tr -d '\n' & echo -n "$rhost: " &
echo "exit" | smbclient -L $rhost 1>/dev/null 2>/dev/null
sleep 0.5 && echo ""
当您在运行Samba的盒子上运行它时，您会得到结果：
root@kali:~/pwk/lab/public# ./smbver.sh [IP]
[IP]: UnixSamba 227a

如有疑问，我们可以在PCAP中检查smb版本。下面是Unix Samba 2.2.3a的一个例子：