Threat Outbreak Alert: Fake Secure Message Notification Email Messages on August 13, 2013

2013-08-13T19:58:16
ID CISCO-THREAT-30401
Type ciscothreats
Reporter Cisco
Modified 2013-08-13T19:58:16

Description

Medium

Alert ID:

30401

First Published:

2013 August 13 19:58 GMT

Version:

1

Summary

  • Cisco Security has detected significant activity related to spam email messages that claim to contain a secure message notification for the recipient. The text in the email message attempts to convince the recipient to open the attachment and view the message. However, the .zip attachment contains a malicious .exe file that, when executed, attempts to infect the system with malicious code.

Email messages that are related to this threat (RuleID6824) may contain the following files:

> Instructions Secured E-mail.zip
Instructions Secured E-mail.exe

The Instructions Secured E-mail.exe file in the Instructions Secured E-mail.zip attachment has a file size of 121,856 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x516B6DEA8AD98C4BBC398981C471CFF4

The following text is a sample of the email message that is associated with this threat outbreak:

> Subject: Instructions Secured E-mail.pdf

Message Body:

I will be forwarding the application through a secure e-mail. Attached are instructions for you to create a password to open the secure e-mails from us. Just a bit of security for when we transmit confidential information.
Thanks,
Kristopher.French
Bank of America
Principal Business Relationship Manager
Direct - 915-187-1470 office
Cell - 915-346-7596 cell
Kristopher.French@bankofamerica.com
This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation.

Cisco Security analysts examine real-world email traffic data that is collected from over 100,000 contributing organizations worldwide. This data helps provide a range of information about and analysis of global email security threats and trends. Cisco will continue to monitor this threat and automatically adapt systems to protect customers. This report will be updated if there are significant changes or if the risk to end users increases.

Cisco security appliances protect customers during the critical period between the first exploit of a virus outbreak and the release of vendor antivirus signatures. Email that is managed by Cisco and end users who are protected by Cisco Web Security Appliances will not be impacted by these attacks. Cisco security appliances are automatically updated to prevent both spam email and hostile web URLs from being passed to the end user.

Related Links
Cisco Security
Cisco SenderBase Security Network

Revision History

  • Version | Description | Section | Date
    ---|---|---|---
    1 | Initial Release | | 2013-August-13 19:58 GMT
    Show Less

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