Threat Outbreak Alert: Fake Payroll Information Email Messages on November 12, 2013

2013-11-13T17:20:44
ID CISCO-THREAT-31745
Type ciscothreats
Reporter Cisco
Modified 2013-11-13T17:20:44

Description

Medium

Alert ID:

31745

First Published:

2013 November 13 17:20 GMT

Version:

1

Summary

  • Cisco Security has detected significant activity related to spam email messages that claim to contain company payroll information 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 (RuleID7837) may contain the following files:

> Payroll.zip
Payroll.exe

The Payroll.exe file in the Payroll.zip attachment has a file size of 11,776 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xF995B739F04068897F9E6A476DC2CA89

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

> Subject: Internal Payroll

Message Body:

File Validity: 13/11/2013
Company: hxxp://cuadra.com
File Format: Office - Excel
Internal Name: Payroll
Legal Copyright: ) Microsoft Corporation. All rights reserved.
Original Filename: Payroll.xls
***** Confidentiality Notice
*.
This e-mail and any file(s) transmitted with it, is intended for the exclusive use by the person(s) mentioned above as recipient(s).
This e-mail may contain confidential information and/or information protected by intellectual property rights or other rights. If you
are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, copying, or action taken
in relation to the contents of and attachments to this e-mail is strictly prohibited and may be unlawful. If you have received this
e-mail in error, please notify the sender and delete the original and any copies of this e-mail and any printouts immediately from
your system and destroy all copies of it.**

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-13 17:20 GMT
    Show Less

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