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Mediyes – the dropper with a valid signature

15

Mar

2012

In the last few days a malicious program has been discovered with a valid signature. The malware is a 32- or 64-bit dropper that is detected by Kaspersky Lab as Trojan-Dropper.Win32.Mediyes or Trojan-Dropper.Win64.Mediyes respectively. Numerous dropper files have been identified that were signed on various dates between December 2011 and 7 March 2012. In all […]

Category General Written by Securelist / Blog 0 Comments

Mac trojan posing as a PDF file

23

Sep

2011

We may have come across a Mac malware in the making. Detected as Trojan-Dropper:OSX/Revir.A, the malware disguises as a PDF file to trick user into triggering its payload. It starts by dropping a PDF file embedded in its body and opens it in an attempt to prevent the user from noticing the ongoing suspicious activity. […]

Category General Written by F-Secure Antivirus Research Weblog 0 Comments

Cybercriminals switch from MBR to NTFS

06

Jul

2011

Modification of the hard drive areas responsible for the initial loading of the system has become increasing popular with cybercriminals. Moreover, cybercriminals have now moved on from just modifying the MBR (master boot record) to infecting the code of the NTFS loader. We recently discovered an interesting piece of malware — Cidox. It is peculiar […]

Category General Written by Securelist / Blog 0 Comments

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Mediyes – the dropper with a valid signature

Mac trojan posing as a PDF file

Cybercriminals switch from MBR to NTFS

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