Threat Outbreak Alert: Fake Meeting Invitation Email Messages on November 4, 2013

2013-11-04T20:37:26
ID CISCO-THREAT-31614
Type ciscothreats
Reporter Cisco
Modified 2013-11-04T20:37:26

Description

Medium

Alert ID:

31614

First Published:

2013 November 4 20:37 GMT

Version:

1

Summary

  • Cisco Security has detected significant activity related to spam email messages that claim to contain a meeting invitation for the recipient. The text in the email message attempts to convince 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 (RuleID7713 and RuleID7713kvr) may contain the following files:

> invitation7CE67DE122BA9B.zip
invitation.exe
invitation89478F1EA7F28CA.zip
Invite.exe

The invitation.exe file in the invitation7CE67DE122BA9B.zip attachment has a file size of 95,545 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x0AA20C40FDF614B94A01738A35CD7E1C

The Invite.exe file in the invitation89478F1EA7F28CA.zip attachment has a file size of 339,257 bytes. The MD5 checksum is the following string: 0xBE6B58BCC2BB1060570FAFB9B44AFCD4

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

> Subject: Fwd: Direct Debiting Seminar Invite

Or

> Message Body:

Good morning,
Please find attached the above, which I thought that you maybe interested in attending.
Kind Regards.
Graham Nevin
Senior Relationship Manager
Commercial Banking
NatWest
1 St Paul's Place
121 Norfolk Street
Sheffield S1 2JF
Telephone: 0114 2066516
Fax: 0114 2723130
Mobile: 07801 194982
Email: graham.nevin@rbs.co.uk
National Westminster Bank Plc, Registered in England No. 929027. Registered Office: 135 Bishopsgate, London EC2M 3UR.
Authorised and regulated by the Financial Services Authority.
This e-mail message is confidential and for use by the addressee only. If the message is received by anyone other than the addressee, please return the message to the sender by replying to it and then delete the message from your computer.
Internet e-mails are not necessarily secure. National Westminster Bank Plc does not accept responsibility for changes made to this message after it was sent. National Westminster Bank Plc may monitor e-mails for business and operational purposes. By replying to this message you give your consent to our monitoring of your email communications with us.
Whilst all reasonable care has been taken to avoid the transmission of viruses, it is the responsibility of the recipient to ensure that the onward transmission, opening or use of this message and any attachments will not adversely affect its systems or data. No responsibility is accepted by National Westminster Bank Plc in this regard and the recipient should carry out such virus and other checks as it considers appropriate.
Supporting your business ambitions www.natwest.com/ahead
Picture (Metafile)

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-04 20:37 GMT
    Show Less

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