A new malspam campaign is underway that is distributing a GlobeImposter variant that appends the ..doc extension to encrypted files. This malspam is pretending to photos being sent to the recipient and will have a subject line that starts in a similar way to "Emailing: IMG_20171221_".

GlobeImposter MalSpam
GlobeImposter MalSpam

These malspam emails contain7zip (.7z) archive attachments that are named after a camera photo's filename such as IMG_[date]_[number].  These 7z files contain a obfuscated .js file that when double-clicked  on will cause the GlobeImposter ransomware to be downloaded from a remote site and executed.

An example of this JS installer can be seen below. 

Obfuscated JS Installer
Obfuscated JS Installer

After the executable is downloaded, it will be executed and the GlobeImposter ransomware will begin to encrypt the computer. When encrypting files on the computer it will append the ..doc extension to encrypted file's name. For example, a file called 1.doc would be renamed to 1.doc..doc.

Encrypted Folder
Encrypted Folder

When GlobeImposter encrypts files it will also create a ransom note named Read___ME.html in each folder a file is encrypted.  

Ransom Note
Ransom Note

This ransom note contains instructions to use Tor to go to the http://n224ezvhg4sgyamb.onion/sup.php onion site.  This site then tells you to contact them to receive payment instructions and to decrypt one file for free. It also lists the email server5@mailfence.com as a way to contact them.

Tor Payment Site
Tor Payment Site

It also contains a link to a support site where you can send them a message.

Tor Support Site
Tor Support Site

Unfortunately, at this time there is no way to decrypt GlobeImposter files for free. For support or help with this ransomware infection, you can ask in our dedicated  topic.

How to protect yourself from the GlobeImposter Ransomware

In order to protect yourself from the GlobeImposter Ransomware you should use standard security practices. This includes using good computing habits and security software. First and foremost, you should always have a reliable and tested backup of your data that can be restored in the case of an emergency, such as a ransomware attack.

You should also have security software that incorporates behavioral detections to combat ransomware and not just signature detections or heuristics.  For example, Emsisoft Anti-Malware and Malwarebytes Anti-Malware both contain behavioral detection that can prevent many, if not most, ransomware infections from encrypting a computer.

Last, but not least, make sure you practice the following security habits, which in many cases are the most important steps of all:

  • Backup, Backup, Backup!
  • Do not open attachments if you do not know who sent them.
  • Do not open attachments until you confirm that the person actually sent you them.
  • Enable the showing of file extensions
  • If an attachment ends with .js, .vbs, .exe, .scr, or .bat, do not open them for any reason.
  • Scan attachments with tools like VirusTotal.
  • Make sure all Windows updates are installed as soon as they come out! Also make sure you update all programs, especially Java, Flash, and Adobe Reader. Older programs contain security vulnerabilities that are commonly exploited by malware distributors. Therefore it is important to keep them updated.
  • Make sure you use have some sort of security software installed that uses behavioral detections or white list technology. White listing can be a pain to train, but if your willing to stock with it, could have the biggest payoffs.
  • Use hard passwords and never reuse the same password at multiple sites.

For a complete guide on ransomware protection, you visit our How to Protect and Harden a Computer against Ransomware article.

A big thanks to Eric Taylor of IT-Simplified for pointing out the malspam campaign.

IOCs

Doc GlobeImposter Variant Hashes:

SHA256: 15e8c986c4602c61a474b51d250e03d5bb178eabc8c5a82a242c1a0fa2227704

Doc GlobeImposter Variant Associated Files:

Read___ME.html

Doc GlobeImposter Variant Network Connections:

http://n224ezvhg4sgyamb.onion/sup.php

Doc GlobeImposter Variant Email addresses:

server5@mailfence.com

Doc GlobeImposter Variant Ransom Note:

Your files are Encrypted!

For data recovery needs decryptor.

If you want to buy a decryptor click "Buy Decryptor"

Buy Decryptor

If not working, click again. 
Free decryption as guarantee.
Before paying you can send us 1 file for free decryption.

If you can not contact, follow these two steps:
1. Install the TOP Browser from this link: torproject.org
2. Open this link in the TOP browser: http://n224ezvhg4sgyamb.onion/sup.php