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Possible phishing threat? What to do?


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#1 Roorooroo

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Posted 14 October 2016 - 09:03 AM

I recently received an email from myself which was unverified and that I cannot remember sending. The contents were as follows :

 

An attempt to transmit confidential data via email was detected.

Please ensure that no company policy has been violated

 

I Googled this and didn't learn much...I don't believe in crying wolf, so it may just have been a misplaced email on my part, but on the other hand, I think it best to be prepared in matters of Internet security.

 

Why do you think I received this mail? Is it a possible phishing threat?

 

I am going to change the passwords on all my Gmail accounts just to be on the safe side, but I'd like to know more about this mail so I can be better prepared in the future. 



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#2 Didier Stevens

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Posted 14 October 2016 - 05:57 PM

Do you still have that mail? Then click on "Show original" and take a look at the headers. The "Received:" entries will show you if the mail came from gmail or not.


Didier Stevens
http://blog.DidierStevens.com
http://DidierStevensLabs.com

SANS ISC Senior Handler
Microsoft MVP 2011-2016 Consumer Security, Windows Insider MVP 2016-2019
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#3 Roorooroo

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Posted 16 October 2016 - 01:24 AM

It seems to have come from gmail, but I can't understand the entire text of the mail. Maybe you can make heads or tails of it?

 

Delivered-To: myemailaddress@hello.com
Received: by 10.194.112.226 with SMTP id it2csp155765wjb;
        Thu, 13 Oct 2016 23:25:11 -0700 (PDT)
X-Received: by 10.98.63.78 with SMTP id m75mr15836262pfa.19.1476426311193;
        Thu, 13 Oct 2016 23:25:11 -0700 (PDT)
Return-Path: <myemailaddress@hello.com>
Received: from smtp.m1.com.sg (smtp.m1.com.sg. [203.117.108.53])
        by mx.google.com with ESMTPS id b20si17286472pfk.263.2016.10.13.23.25.10
        for <myemailaddress@hello.com>
        (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
        Thu, 13 Oct 2016 23:25:11 -0700 (PDT)
Received-SPF: softfail (google.com: domain of transitioning myemailaddress@hello.com does not designate 203.117.108.53 as permitted sender) client-ip=203.117.108.53;
Authentication-Results: mx.google.com;
       spf=softfail (google.com: domain of transitioning myemailaddress@hello.com does not designate 203.117.108.53 as permitted sender) smtp.mailfrom=myemailaddress@hello.com;
       dmarc=fail (p=NONE dis=NONE) header.from=gmail.com
Message-Id: <58007a47.943c620a.b704a.7fccSMTPIN_ADDED_MISSING@mx.google.com>
Date: Fri, 14 Oct 2016 14:25:07 +0800
To: <myemailaddress@hello.com>
From: <myemailaddress@hello.com>
MIME-Version: 1.0
Content-Type: Multipart/Mixed;
  boundary="------------Boundary-00=_VTX052N3LHG2QL800000"
X-NAI-Header: Modified by McAfee Email Gateway (5000)
X-NAI-ID: 5e6a_4e61_f9244498_392a_4d25_9106_e1a8dc3a77f6PNT:06338C42-3349-46C2-9AF0-DCDB2BBED17E
Subject: NOTICE: mail delivery status
 
--------------Boundary-00=_VTX052N3LHG2QL800000
Content-Type: text/plain;
  charset="utf-8"
Content-Transfer-Encoding: 7bit
 
An attempt to transmit confidential data via email was detected.
 
Please ensure that no company policy has been violated
--------------Boundary-00=_VTX052N3LHG2QL800000--


#4 Didier Stevens

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Posted 16 October 2016 - 06:26 AM

It doesn't come fromGmail, it comes from an IP address in Singapore: Received: from smtp.m1.com.sg (smtp.m1.com.sg. [203.117.108.53])

 

M1 is a major telco in Singapore.


Didier Stevens
http://blog.DidierStevens.com
http://DidierStevensLabs.com

SANS ISC Senior Handler
Microsoft MVP 2011-2016 Consumer Security, Windows Insider MVP 2016-2019
MVP_Horizontal_BlueOnly.png

 

If you send me messages, per Bleeping Computer's Forum policy, I will not engage in a conversation, but try to answer your question in the relevant forum post. If you don't want this, don't send me messages.

 

Stevens' law: "As an online security discussion grows longer, the probability of a reference to BadUSB approaches 1.0"


#5 Roorooroo

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Posted 17 October 2016 - 02:32 AM

Thanks for your information. I think I know what happened on my end now. 



#6 Didier Stevens

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Posted 17 October 2016 - 02:55 AM

You're welcome. Glad I could help you figure it out.


Didier Stevens
http://blog.DidierStevens.com
http://DidierStevensLabs.com

SANS ISC Senior Handler
Microsoft MVP 2011-2016 Consumer Security, Windows Insider MVP 2016-2019
MVP_Horizontal_BlueOnly.png

 

If you send me messages, per Bleeping Computer's Forum policy, I will not engage in a conversation, but try to answer your question in the relevant forum post. If you don't want this, don't send me messages.

 

Stevens' law: "As an online security discussion grows longer, the probability of a reference to BadUSB approaches 1.0"


#7 Roorooroo

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Posted 18 October 2016 - 04:02 AM

Called M1 and they said it's not a security threat. Some of my friends concur. Does anyone here get mails like this often? 






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