Threat Outbreak Alert: Fake Order Document Email Attachment Messages on September 2, 2013
IntelliShield: Threat Outbreak Alert
2013 July 15 12:54 GMT
2013 September 04 16:28 GMT
Cisco Security Intelligence Operations has detected significant activity on September 2, 2013.
Cisco Security Intelligence Operations has detected significant activity related to spam email messages that claim to contain an order document for the recipient. The text in the email message attempts to convince the recipient to open the attachment and view the document. 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 (RuleID6571 and RuleID6571KVR) may contain the following files:
Document.zip Document.exe Exciting.zip Exciting.exe My Pix.zip Document_2.zip
The Document.exe file in the Document.zip attachment has a file size of 851,968 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x47CCB7AE103AB4C7BAF6B38E711579C9
The Exciting.exe file in the Exciting.zip attachment has a file size of 100,490 bytes. The MD5 checksum is the following string: 0xE4A55F6AC6E6B0986706280974C41D6F
A variant of the Exciting.exe file in the Exciting.zip attachment has a file size of 123,018 bytes. The MD5 checksum is the following string: 0xF98E6ADBF98F231407772F50C5F23F74
A third variant of the Exciting.exe file in the Exciting.zip attachment has a file size of 118,922 bytes. The MD5 checksum is the following string: 0x85CE95C0A61A523E6D7F1EB3A9A31B32
A variant of the Document.exe file in the My Pix.zip attachment has a file size of 2,347,520 bytes. The MD5 checksum is the following string: 0xB3E68F5C15DF1FBE930D3971A4B26630
A third variant of the Document.exe file in the Document.zip attachment has a file size of 880,640 bytes. The MD5 checksum is the following string: 0xBCA64077B31417CC1B8FEC23001BF55C
A fourth variant of the Document.exe file in the Document_2.zip attachment has a file size of 4,099,593 bytes. The MD5 checksum is the following string: 0x9AB31102EEB1D6D63055D9FD877E398E
The following text is a sample of the email message that is associated with this threat outbreak:
Good day sir,
Here are samples of our new order check and get back to us.
Miss. Cathy Liew.
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.
The security vulnerability applies to the following combinations of products.
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