Questions tagged [email-attachments]

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1answer
85 views

Sending securely attachments over email

Email exchange is not a secure means of communication despite using SSL to connect to (all/most?) the email providers. What I am not sure though, is what is a good way to send important information ...
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0answers
17 views

Can I safely view a malicious PDF in gmail or dochub? [duplicate]

I receive pdfs that could be malicious. Is it safe to view them within Gmail? What about DocHub? Is that the same as 'opening' them? (FYI I use Firefox as a browser)
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76 views

How to determine if a PC is safe after receiving a suspicious email message

I was checking my gmail account spam folder and I noticed an email sent by a known sender. I thought it was flagged as spam by mistake so I opened it. Then I realized the content is the same as ...
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1answer
74 views

How I can read and handle MS Office documents, such as doc/ppt files, securely?

I've heard of too many horror stories of people opening a seemingly innocent docx or pptx file that they've got from a business partner, only to find out that it had embedded malware inside. What ...
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1answer
72 views

New trend? Recognizable and specific subject in Spam / malware mails

It seems that a new trend has emerged in the past few weeks. While users are (meanwhile) aware that an unexpected mail with subject "Your invoice" or "Your delivery" is suspicious, ...
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0answers
86 views

Handling file uploads securely in phpmailer/php

I have a lengthy HTML form with around 20-26 file uploads required and some of them are even multiple. I am really concerned about how secure it is. I would really like to have some secure solution to ...
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2answers
163 views

Secure way of sending an email attachment in a user-friendly manner

In the last months I very often was in a position where I needed to send an email attachments with sensitive content to someone whom I didn't know well personally (so that I could talk to them how set ...
0
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2answers
139 views

Phishing emails - What do I look for?

I want to be able to spot a phishing email. What are the things to check when investigating and doing forensics on one? There are some things I know to look for already but I want to get moer ...
45
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8answers
10k views

Why do email server/clients block executable attachments?

If I send an email with an .exe attachment to an Outlook recipient, the email client blocks the attachment and the recipient has no way of overriding this security setting (short of making certain ...
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0answers
30 views

Safe way to open potentially compromised attachments [duplicate]

I have in my inbox what I believe to be (95% sure) a phishing attack email or my IT department doing a phishing attack knowledge awareness campaign. I'm a very curious person by nature and I'd like ...
0
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1answer
237 views

Possible dangers of .doc files

I just recieved some generic work related mail with word file attached that was requesting to Enable Editing in order to view its content. I'm not going to fall for it but it got me wondering. What ...
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2answers
17k views

Possible attack via Netflix; what action should I take, if any?

Late last night I received a "password reset" email from info@mailer.netflix.com. It looked legit, but I had not requested a password reset. I checked my account's "recent account access" but saw ...
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1answer
257 views

Are there any kinds of ID where it would be safe to email a photocopy of that ID?

I am developing an online registration form for a discount program whose eligibility can be determined by examining a person's ID. When a user submits the form, he or she is asked to upload a ...
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3answers
800 views

What's the point of S/MIME?

I received an email recently which displayed as an empty body with a smime.p7m attachment. After some Googling, I discovered it was an encrypted email -- neat! So I started looking for the key. But... ...
3
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2answers
165 views

How this tracking (and more) was done using an image in an email?

As reported in the NY Times, there was some type of electronic spying in a high-profile military trial. Its claimed that the prosecutors were spying on the defense: The court-martial ... has been ...
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0answers
77 views

Email PDF Attachment altered 'in transit'

I've tried searching a few terms but can't really answer my question. We have a system which sends out invoices and we have had a couple of instances with one individual where the PDF attachment has ...
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2answers
141 views

ML approach to malicious attachments using email contents

Based on my understanding of the field, it seems like there is a lot of attention paid to spam filtering based on the contents and metadata of an email, and there is considerable attention paid to ...
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2answers
3k views

Is it possible to get infected by opening an email in Android Gmail app?

I just received an email from an unknown person, titled "da vinci" and containing a docx file with the same name. Not suspicious at all, right? I have not opened or downloaded the file, but: The ...
3
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2answers
878 views

I received an encrypted email attachment as a reply to a previous conversation, months later

As in the title - I received an email reply to a months old thread containing a password protected zip file. I had previously asked them for a particular CAD file, but this was months ago and we had ...
53
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2answers
11k views

How do US government agencies open their email attachments?

I suppose the FBI receives email with attachments, like any other government agency: documents, resumes/CVs, etc. I also suppose they are very careful not to get infected, more than the average user, ...
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0answers
86 views

Search function in Outlook and attachements

I am wondering how the search function of Outlook is working, especially in regards to researching key words that are presents in emails attachements. Does the Outlook search function opens the files ...
3
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3answers
8k views

How to inspect an email attachment without downloading it?

I accidentally opened a PDF email attachment on an Android phone as I was trying to figure out if the email was fraud or a scam. It was an email claiming I booked a flight and the pdf had my e-tickets....
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3answers
45 views

Sending email from my provider back to my provider with data from user input secure?

My boss wants me to create the following functionality: A user fills out a form on our website with some data. He can also upload some files, which have personal information. After the form is ...
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4answers
845 views

Proving a forwarded email attachment was not modified

There was an issue and my employer asked me to forward the email that I sent out to a client a few days prior. The email contained 3 PDF attachments and I immediately sent this to my manager. I am ...
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2answers
169 views

Downloaded “DHL” fraud email to Linux, action needed?

Yesterday I ordered a package and today received an email from "DHL". I downloaded an attachment from the email and clicked it. It opened a htm page. (I did not fill out any information.) I now ...
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3answers
271 views

Executable files in email attachments on UNIX

.EXE files are a danger in email attachments, and are usually blocked by Windows email clients. How is this on UNIX/macOS, where executables don't have an extension? Based on the file data, how do ...
2
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2answers
114 views

Can email be secured by the receiver only, without action by the sender?

An established financial institution just directed me to email them a document with sensitive information. When I questioned the security, the CS rep and manager both tried to assure me that, "...
4
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2answers
365 views

E-Mail attachments can be opened using their URL in webmail even after logging off

My E-Mail is on Bell Net. I noticed today what I thought was a major security hole. Then I wasn't sure so I wanted to post this. I discovered that even though I have logged off my E-Mail, I can still ...
1
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1answer
6k views

What's the risk in downloading a .pdf from a phishing email?

I've received an email which is an obvious phishing attempt. However, a .pdf has been attached which I want to open, just out of curiosity! What are the risks in downloading .pdf files from unknown ...
1
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1answer
282 views

I need to download and open an email attachment but how to check if it's safe before?

Someone sent a 39 kb file email attachment. A strange picture appears over the attachment. I didn't open it. I would need to check the file but I'm afraid it's a scam. I was planning to log into my ...
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1answer
91 views

Transferring potentially malicious e-mail attachments to air-gapped machine

Overview: I am interested in having an e-mail account designated for receiving anonymous tips as part of a larger anonymous tip infrastructure at my business. My professional domain's e-mail is ...
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2answers
279 views

How can I select a compression utility that is popular and secure enough

In a previous posting on Which is a safe way to transfer a copy of a sensitive document?, I have received suggestions to compress and encrypt an attachment file using the options of utilities such as ...
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3answers
1k views

Which is a safe way to transfer a copy of a sensitive document?

A reputable and clearly identified institution asked me, for legitimate reasons, to e-mail a scan of the passport. However, I regard the passport as a sensitive document and am pretty reluctant to use ...
0
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1answer
115 views

How does Thunderbird quarantine downloaded emails? Is it dangerous to download emails and store them offline?

There shouldn't be a high security risk as long as the email attachments aren't opened / executed by the user but it could still be a risk and maybe I'm wrong. So how does Thunderbird quarantine ...
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4answers
3k views

What lessons can be learned from the latest spate of Ransomware attacks? [closed]

I'm not sure this is the right place, but figured people would find it useful if they aren't too familiar with security policies and general best practices. There is a lot of information out there, ...
1
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2answers
856 views

Is EICAR a valid test for a mail virus scanner?

We have a fairly standard commercial e-mail setup, we use Outlook and Exchange and have a very well known third party service providing spam & phishing filtering and virus and malware scanning. I ...
0
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2answers
3k views

Is sending personal information over email between different providers secure?

For example, if I use Gmail, and use my Gmail account to send personal information, which I don't want others to see except the intended recipient, to a Hotmail account, both in the body as well as an ...
0
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1answer
320 views

Blocking Email Attachment download from outside company in Office 365

In Office 365, Emails can accessed from anywhere (within or outside of the company). Want to block Email attachment download from outside of the company. Emails should be accessible from outside of ...
2
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1answer
776 views

Sandbox for attachment accessment

I am currently trying to review an e-mail sent to myself, that could be malicious, or it could not. I would like to create a sandbox environment to review this kind of message (it's more than likely ...
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6answers
5k views

How do I investigate where personal information in a fraudulent email was leaked from?

I have seen an email which is obvious from the content that it's a phishing/spurious email. However, the personal content is quite revealing and specific to that individual. How could I go about ...
3
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2answers
621 views

My company sent a phishing email - can they see if I saved the attachment?

My company is doing an anti-phishing campaign and sent out a "fake" email to see how many people would open the attachment. They had previously sent out information about how to avoid these kind of ...
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7answers
3k views

how to send confidential data through email?

At the moment I'm doing the following: add to zip and encrypt files send the encrypted zip to the recipient create a note through noteshred.com share the link through out-of-band SMS noteshred is ...
0
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2answers
242 views

Malicious email containing PDF attachments [closed]

I'm an university student and I have to do a data mining for a research project. For this reason I need emails containing malicious PDF attachments(I am interested in the .eml files). Where can I find ...
0
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1answer
8k views

Incoming email with smime.p7s attachment

This is a scenario I have at work. We're receiving emails with .p7s attached files from a single user of a company(hence the company domain for eg. abc.com) our users interact with via mail. We use ...
1
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1answer
897 views

Does putting in quarentine attachments with two dots increase security in Outlook 2010?

Outlook 2010 and antispam systems already forbid executable attachments. In this scenario, does putting attachments with two dots in quarentine increase security? Attackers used to use this technique ...
20
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3answers
32k views

How can I tell if a PDF file I was sent contains malware?

I was emailed a PDF file by a family member. I have reason to suspect that it was given to said family member by someone who would like nothing more than to infect me with a Remote Access Trojan. How ...