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Threat Outbreak Alert

Threat Outbreak Alert: Fake Tax Documentation Email Messages on August 27, 2013

 
Threat Type:IntelliShield: Threat Outbreak Alert
IntelliShield ID:30103
Version:3
First Published:2013 July 16 17:42 GMT
Last Published:2013 August 27 13:05 GMT
Port: Not available
Urgency:Possible use
Credibility:Confirmed
Severity:Mild Damage
 
Version Summary:Cisco Security Intelligence Operations has detected significant activity on August 27, 2013.
 

Description
 
Cisco Security Intelligence Operations has detected significant activity related to spam email messages that claim to contain tax documentation 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 (RuleID6601 and RuleID6601KVR) may contain the following files:

ATO_TAX_16072013.zip
ATO_TAX_16072013.exe
TAX_mpd.zip
TAX_08222013.exe
TAX_08272013.zip
TAX_08272013.exe

The ATO_TAX_16072013.exe file in the ATO_TAX_16072013.zip attachment has a file size of 117,248 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xECDD609C484E4B0C13E8D70C16BCF036

The TAX_08222013.exe file in the TAX_mpd.zip attachment has a file size of 119,296 bytes. The MD5 checksum is the following string: 0x6C092550097A118B80295FFE68135CEC

The TAX_08272013.exe file in the TAX_08272013.zip attachment has a file size of 22,528 bytes. The MD5 checksum is the following string: 0x6EFD96B8A7101B22B379A3FE5FD890FE

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

Subject: Australian Taxation Office - Refund Notification

Message Body:

Australian Taxation Office
16/07/2013
TAX REFUND NOTIFICATION
After the last calculation of your fiscal activity we have determined that you are eligible to receive a refund of 5402.27 AUD.
For more details please follow the steps bellow :
- Right-click the link on the attachment name, and select Save Link As, Save Target As or a similar option provided.
- Select the location into which you want to download the file and choose Save.
- Open the file Microsoft Word file to view the details.
Carlo Avery,
Tax Refund Department
Australian Taxation Office

Or

Subject: You have received new messages from HMRC

Message Body:

Please be advised that one or more Tax Notices (P6, P6B) have been issued.
For the latest information on your Tax Notices (P6, P6B) please open attached report.
Please do not reply to this e-mail.
The original of this email was scanned for viruses by the Government Secure Intranet virus scanning service supplied by Vodafone in partnership with Symantec. (CCTM Certificate Number 2009/09/0052.) On leaving the GSi this email was certified virus free.
Communications via the GSi may be automatically logged, monitored and/or recorded for legal purposes.
1.This e-mail and any files or documents transmitted with it are confidential and intended solely for the use of the intended recipient. Unauthorised use, disclosure or copying is strictly prohibited and may be unlawful. If you have received this e-mail in error, please notify the sender at the above address and then delete the e-mail from your system. 2. If you suspect that this e-mail may have been intercepted or amended, please notify the sender. 3. Any opinions expressed in this e-mail are those of the individual sender and not necessarily those of QualitySolicitors Punch Robson. 4. Please note that this e-mail and any attachments have been created in the knowledge that internet e-mail is not a 100% secure communications medium. It is your responsibility to ensure that they are actually virus free. No responsibility is accepted by QualitySolicitors Punch Robson for any loss or damage arising from the receipt of this e-mail or its contents. QualitySolicitors Punch Robson:

Cisco Security Intelligence Operations 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 Intelligence Operations
Cisco SenderBase Security Network
 
Alert History
 
Version 2, August 22, 2013, 2:14 PM: Cisco Security Intelligence Operations has detected significant activity on August 22, 2013.

Version 1, July 16, 2013, 5:42 PM: Cisco Security Intelligence Operations has detected significant activity on July 15, 2013.


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
IntelliShieldThreat Outbreak Alert Original Release Base

Associated Products:
N/A




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LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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