Cisco Security has detected significant activity related to spam e-mail messages that claim to contain a Western Union receipt for the recipient. The text in the e-mail message attempts to persuade the recipient to open the attachment to view the receipt. However, the attachment contains a malicious .scr
file that, when executed, attempts to infect the system with malicious code.
E-mail messages that are related to this threat (RuleID4860) may contain the following file(s):
The file wu_receipt_jpeg.scr
has a file size of 1,011,712 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xAC0630A33BDE5DAD66FF64FC63F27994
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Don't call me,i am at work.I sent the fee of $900 by Western Union today at about 17:00 my time which is 2am your time,Mtcn-----673 902 4473,sender Herb Stockman for no reason will you ask me for more money and i will be checking my bank account time to time make sure you also send me the customer transfer wire slip copy.Please call me when you pick up.
Cisco Security analysts examine real-world e-mail
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 e-mail 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 Virus Outbreak Filters protect customers during the
critical period between the first exploit of a virus outbreak and the
release of vendor antivirus signatures. E-mail that is managed by Cisco
and end users who are protected by Cisco web security
appliances will not be impacted by these attacks. Cisco appliances are automatically updated to prevent both spam e-mail and
hostile web URLs from being passed to the end user.
Cisco Threat Operations Center
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