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By Milo Salvia and Kamlesh Patel

The Cofense Phishing Defense CenterTM has observed a phishing campaign that masquerades as a voicemail message from a well-known company. The goal is to steal your domain credentials by mimicking the Outlook Web App (OWA). 

Email Body: 

The message body is designed to mimic your typical VOIP missed call message delivered via email when a user misses a call. A simple HTML box appears with a blue hyperlink, Play Voice. One would assume it was meant to say Play Message or Play Voice Message. This could indicate that English is not the threat actor’s first language and the original message was mistranslated. It’s the first indicator that something is not quite right about this message. 

Fig 1. Email Body

Message body in HTML:  

If you look at the message body in HTML, you can see that the embedded hyperlink redirects to www[.]lkjhyb[.]com_dg[.]php=”. As you can tell, the URL has been wrapped by a URL filtering service. 

 

<Div align=”center” style=”text-align: center;”> 

<a href=”hxxps://urldefense[.]proofpoint[.]com/v2/url?u=hxxps-3A__www[.]lkjhyb[.]com_dg[.]php=“>Play Voice</a></div> 

</span></font></div>* 

 

Fig 2. Email Body in Plain Text  

Email Headers: 

A closer look at the header information reveals that the threat originates from the domain “protogonay.com. Further research into this domain suggests that it could be a throwaway domain—no company or website can be found that is directly linked to the name 

ext-caller108[@]progonay[.]com.” The threat source itself uses ext-caller108 to add legitimacy to the voicemail ruse. 

** From: Voice Ext <ext-caller108[@]progonay[.]com> 

To: <dxxx.mxxx@axxxx.com> 

Subject: Voice call from ******* (39 seconds) 

Date: Wed, 22 May 2019 08:23:33 -0700 

Message-ID: <20190522082333.8F2288151F642334@progonay.com> 

Content-Type: text/html; charset=”iso-8859-1″ 

X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-05-22_08:,, 

 signatures=0 

X-Proofpoint-Spam-Details: rule=notspam policy=default score=1 priorityscore=1501 malwarescore=0 

 suspectscore=2 phishscore=0 bulkscore=0 spamscore=1 clxscore=-94 

 lowpriorityscore=0 mlxscore=1 impostorscore=0 mlxlogscore=206 adultscore=0 

Fig 3. Email Headers

Phishing Page:  

Once the user clicks on the “Play Voice (sic)” hyperlink, it redirects to what looks like the default corporate Outlook Web App (OWA) login page. This page is designed to steal your O365 domain credentials. As we can see, it asks the victim to supply domain/username:  and password.  

Fig 4. Phishing Page 

Gateway Present:  

This threat was found in an environment running Proofpoint Email Gateway and URL filter. 

Conclusion:  

Threat actors pull out the stops to deliver malicious messages to users’ inboxes. This “voice mail” message is yet another creative example.  

To help protect against this type of credential phish, Cofense PhishMeTM offers a template called “Play Voice Message.” 

Learn more about evolving phishing tactics and techniques—view the Cofense Phishing Threat and Malware Review 2019. 

 

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