Threat Outbreak Alert: Fake Invoice Notification Email Messages on November 7, 2013

2013-11-07T21:06:30
ID CISCO-THREAT-31680
Type ciscothreats
Reporter Cisco
Modified 2013-11-07T21:06:30

Description

Medium

Alert ID:

31680

First Published:

2013 November 7 21:06 GMT

Version:

1

Summary

  • Cisco Security has detected significant activity related to spam email messages that claim to contain an invoice for duplicate payment for the recipient. The text in the email message attempts to persuade the recipient to open the attachment for 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 (RuleID7752) may contain the following files:

> 1107_0001.zip
1107_0001.exe

The 1107_0001.exe file in the 1107_0001.zip attachment has a file size of 24,576 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x4EA63A1DEF24857817E58B6EF360E66F

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

> Subject: FW:Duplicate Payment

Message Body:

Attached is the information for the duplicate payment of Invoice #35 for $13,160.83. We have applied it to your account as a prepayment. Let me know if you would like this to be applied to future invoices or refunded.

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-November-07 21:06 GMT
    Show Less

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