Cisco Security Intelligence Operations has detected significant activity related to German-language spam e-mail messages that claim to contain a postal delivery failure notification message for the recipient. The text in the e-mail message instructs the recipient to open the attachment to view the postal label. 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 (RuleID4241, RuleID4253KVR and RuleID4253) may contain the following files:
Postetikett#1485-245DE.zip
Postetikett#1485-245DE.exe
Postetikett#1345-134DE.zip
Postetikett#1345-134DE.exe
Postetikett#DE9445-145.zip
Postetikett#DE9445-145.exe
The Postetikett#1485-245DE.exe file in the Postetikett#1485-245DE.zip attachment has a file size of 72,192 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x08B7F1A0455405CC95427B2D826391CA
The Postetikett#1345-134DE.exe file in the Postetikett#1345-134DE.zip attachment has a file size of 72,704 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x73A052F7604EEA325A19DFAC601B4A06A
The Postetikett#DE9445-145.exe file in the Postetikett#DE9445-145.zip attachment has a file size of 57,856 bytes. The MD5 checksum is the following string: 0x310B14AE6798349FECF04A73528ABE77
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Subject: Deutsche Post#Holen Sie ihre Postsendung ab.
Message Body:
Lieber Kunde,
Es ist unserem Boten leider misslungen einen Postsendung an Ihre Adresse zuzustellen.
Grund: Ein Fehler in der Leiferanschrift.
Sie konnen Ihre Postsendung in unserer Postabteilung personlich kriegen.
Anbei finden Sie einen Postetikett.
Sie sollen dieses Postetikett drucken lassen, um Ihre Postsendung in der Postabteilung empfangen zu konnen.
Vielen Dank!
Deutsche Post AG.
Cisco Security Intelligence Operations 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 IronPort systems to protect customers. This report will be updated if there are significant changes or if the risk to end users increases.
Cisco IronPort 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 IronPort web security appliances will not be impacted by these attacks. Cisco IronPort appliances are automatically updated to prevent both spam e-mail and hostile web URLs from being passed to the end user.
Related Links
Cisco Security Intelligence Operations
Cisco Threat Operations Center
Cisco SenderBase Security Network
