|09 Apr 2014||#1|
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UPATRE Ups the Ante With Attachment Inside An Attachment
In 2013, the malware UPATRE was noted as one of the top malware seen attached to spammed messages. The malware was also notorious for downloading other malware, including ZeuS and ransomware, particularly its more sophisticated form, Cryptolocker. This was enough reason to believe that the UPATRE threat is constantly advancing its techniques–this time, by using multiple levels of attachments.
Spam within spam
We took note of the new UPATRE malware technique when our research brought us to a spammed message that imitates emails from known banks such as Lloyds Bank and Wells Fargo. The “spam within spam” technique was already notable in itself, as the .MSG file contained another .MSG file attached–only this time, the attached file actually contains the UPATRE variant, which we detect as TROJ_UPATRE.YYKE.
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