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1. #Untangle firewall jscript.nemucod.hm archive
2. #Untangle firewall jscript.nemucod.hm software
3. #Untangle firewall jscript.nemucod.hm code
4. #Untangle firewall jscript.nemucod.hm zip

wsf to the file types to block in your AppLocker Group Policy.

#Untangle firewall jscript.nemucod.hm software

It has a machine learning capability to help your network administrators block dangerous email threats. Use Office 365 Advanced Threat Protection.Ensure that Microsoft Active Protection Service has been enabled.Use an up-to-date real-time antimalware product, such as Windows Defender for Windows 10.To avoid falling prey from this new Nemucod malware campaign: Just like the Nemucod campaigns before this, the malware downloader payload includes ransomware, such as:

#Untangle firewall jscript.nemucod.hm code

Upon code decryption, the following URLs – where the malware payload is being hosted – are revealed: It tricks the AV scanners to think the command is part of a comment, thus preventing the AV scanners from interpreting it as an executable code. Such a command can possibly evade AV scanner detection. This Nemucod version leverages the (conditional compilation) command. Underneath the WSF is the same typical Nemucod JScript code.įigure 3: Nemucod code inside WSF: has encrypted code and the decryption is written under ( conditional compilation) Because Windows script files are not specific to a script language, the underlying code can have either JavaScript or VBScript, depending on language declaration in the file. It incorporates several features that offer you increased scripting flexibility. Windows Scripting File is a text document containing Extensible Markup Language (XML) code. These are script files that might contain malicious code which could harm your system. Some might look at the sample file names and assume that they might originally have been a long unique string identifier consisting of random letters and numbers that could be a transaction ID, receipt number or even user ID: wsf extension creates an illusion that the file name was either abbreviated, was intentionally omitted, or shortened by the system because it was too long:

#Untangle firewall jscript.nemucod.hm archive

The following screenshots show how the malicious file attachment looks like in the recent campaign:įigure 1: Example of how an email spam containing the latest version of Nemucod might look likeįigure 2: Example of how Nemucod malware looks like when extracted and opened with an archive viewer What the double dots mean: Social engineering for unsuspecting eyesĪs seen in the following file name samples, the double dot paired with the uncommon.

#Untangle firewall jscript.nemucod.hm zip

zip file, using a file name of interest with. It still spreads through spam email attachment, typically inside a. It is a variation of what has been observed since last year (2015) – the TrojanDownloader:JS/Nemucod malware downloader using JScript. The latest Nemucod campaign shows the malware distributing a spam email attachment with a.