Cisco Security has detected significant activity related to spam email messages that claim to contain a payment confirmation notice for the recipient. The text in the email message attempts to convince the recipient to open the 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.
Email messages that are related to this threat (RuleID9581) may contain the following files:
file in the confirmation.zip
attachment has a file size of 1,151,644 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x04E4F68EB9E1FAD23816F73FB5BD864C
The following text is a sample of the email message that is associated with this threat outbreak:
Subject: Proof of payment
RELEASED from Quarantine: See notice at bottom.
Please find attached receipt of payment transferred.
NOTICE: This message was recently released from the Key Bank quarantine. All inbound executable files (.vbs, .exe, .pif, .bat, etc.) are temporarily quarantined until they can be manually scanned for viruses. As a result of this security requirement, delivery of this message may have been delayed.
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.
Cisco SenderBase Security Network