Threat Outbreak Alert: Fake Voice Message Delivery Email Messages on November 13, 2013

2013-11-13T19:58:21
ID CISCO-THREAT-31739
Type ciscothreats
Reporter Cisco
Modified 2013-11-14T17:24:27

Description

Medium

Alert ID:

31739

First Published:

2013 November 13 19:58 GMT

Last Updated:

2013 November 14 17:24 GMT

Version:

2

Summary

  • Cisco Security has detected significant activity related to spam email messages that claim to contain a voice message for the recipient. The text in the email message attempts to convince the recipient to open the attachment and view the details. 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 (RuleID7835 and RuleID7835KVR) may contain the following files:

> MSG00008.zip
MSG00088.exe
MSG00031.zip
MSG00010.exe

MSG00026.zip
MSG00021.exe

The MSG00088.exe file in the MSG00008.zip attachment has a file size of 21,504 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x123437341E51D72BF2DB9E5BA8ED7280

The MSG00010.exe file in the MSG00031.zip attachment has a file size of 15,360 bytes. The MD5 checksum is the following string: 0x9F50A722340DAD506F2B876EAB3F7F60

The MSG00021.exe file in the MSG00026.zip attachment has a file size of 11,264 bytes. The MD5 checksum is the following string: 0xF740DF48A6F9E41E1C536B0B2C68420A

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

> Subject: New Voicemail Message

Message Body:

IP Office Voicemail redirected message

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
    ---|---|---|---
    2 | Cisco Security has detected significant activity on November 13, 2013. | | 2013-November-14 17:24 GMT
    1 | Cisco Security has detected significant activity on November 12, 2013. | | 2013-November-13 19:58 GMT
    Show Less

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