Cisco Security has detected significant activity related to spam e-mail messages that claim to contain an ACH transaction notification for the recipient. The e-mail message instructs the recipient to open the .zip attachment to view the receipt. However, the .zip
attachment contains a malicious .exe
file that, when executed, attempts to infect the system with malicious code.
E-mail messages that are related to this threat (RuleID5362) may contain the following files:
payment receipt - 884993762994.zip
payment receipt - 884993762994.exe
The payment receipt - 884993762994.exe
file in the payment receipt - 884993762994.zip
attachment has a file size of 54,272 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x5A8A36F811B7C2A16E461705A816AB5E
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Subject: Automatic transfer notification
ACH transaction is completed. $0423 has been successfully transferred.
If the transaction was made by mistake please contact our customer service.
Receipt of payment is attached.
*** This is an automatically generated email, please do not reply ***
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 security appliances 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 security 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
Cisco SenderBase Security Network