Sunday, November 12, 2017

COBRA - Crysis / Dharma Ransomware

COBRA CRYSIS - NEW VARIANT OF RANSOMWARE

New variant of the Crysis / Dharma ransomware that adds the .cobra extension to the encrypted files

Recently, security researcher Jakub Kroustek discovered a new ransomware sample that appears to be a new variant of the ransomware Crysis that appends the .cobra extension to the file name of the encrypted file.

It is not known exactly how this variant is distributed, but in the past Crysis is normally propagated by piracy in remote desktop services and manually installs the ransomware.
When this variant of Cobra ransomware is installed, a computer will be scanned for data files and encryption of them. When you encrypt a file, an extension will be added in the .id- [id]. [E-mail] .cobra format .id- [id]. [E-mail] .cobra .id- [id]. [E-mail] .cobra . For example, a file called pepe.jpg was encrypted and the name was changed to pepe.jpg.id-BCBEF350.[Cranbery@colorendgrace.com].cobra .

 
It should be noted that this ransomware will encrypt assigned network drives and unassigned network shares. Therefore, it is important to make sure that the actions of your network are blocked so that only those who really need access have permission.
When this variant encodes a computer, it will also remove all plumes from volume snapshots on the machine so that they can not be used to recover encrypted files. It is removed by running the vssadmin delete shadows /all /quiet .
 
This ransomware will also create two different rescue notes on the infected machine. One of them is the file info.hta , which was launched by an automatic execution when a user initiates a session on the computer.


The other note is called encrypted files !!. Txt and can be found on the desktop.
Both rescue notes contain instructions to contact cranbery@colorendgrace.com in order to obtain payment instructions.
 
Finally, the ransomware will be configured to start automatically when it connects to Windows. This allows you to encrypt new files that are created since the last time executed.

It is not possible to decipher the new variant of Crysis Cobra

Unfortunately, at this time it is not possible to decrypt the files encrypted by the .cobra Crysis ransomware for free. The only way to recover the encrypted files is through a backup, or if you are unbelievably lucky, through volume snapshots. Although Crysis does not attempt to remove volume snapshots, in rare cases, ransomware infections do not do so for any reason.

How to protect yourself from the Crysis ransomware

In order to protect yourself from Crysis, or from any ransomware, it is important that you use good computer habits and security software. First and foremost, you should always have a reliable and proven backup of data that can be restored in the event of an emergency, such as an attack on the ransomware. You must also have security software that contains behavioral detections such as squared Anti-Malware, Malwarebytes, or HitmanPro

IOC :

COBRA SHA256: de6376e23536b3039afe6b0645da4fc180969b1dc3cc038b1c6bd5941d88c4d8
 

Cobra Associated Emails:

cranbery@colorendgrace.com
 
 Ref Link :

https://www.hybrid-analysis.com/sample/45fb6d93d7bbfdde3d56ddad3861d85e94551c86bd1409c709ad5895d5f7e4ae?environmentId=100

https://virustotal.com/ru/file/de6376e23536b3039afe6b0645da4fc180969b1dc3cc038b1c6bd5941d88c4d8/analysis/
 

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Open source Tools for Live Meeting(Web Conferencing)

posts. Guys the most of you find these posts a valuable resource for the e-Learning community. As a result, the following post is Free and Open Source Web Conferencing (Online Meetings, Webinars) Tools for e-Learning.




The following list contains free and open source Web Conferencing tools that are n't in particular order.



Also, you should be sure that the e-Learning community will highly appreciate:

  1. if you post a comment with your experience with these tools and/or,

  2. if you post a comment with a link to any other free and open source Web Conferencing tool.

We support Free eLearning! Do you?



I support Free eLearning




BigBluebutton* is built for Higher Education. It enables universities and colleges to deliver a high-quality learning experience to remote students. BigBlueButton is an active open source project that focuses on usability, modularity, and clean design -- both for the user and the developer. The project is hosted at Google Code. BigBlueButton is built by combining over fourteen open source components.



*note: Epignosis has created a module that provides integration of BigBlueButton conferencing in eFront Open Source Learning Management System. BigBlueButton is a free web-conferencing tool with text chat, audio and video capabilites, a virtual whiteboard and many more presentation and conferencing features.




OpenMeetings is a free browser-based software that allows you to set up instantly a conference in the Web. You can use your microphone or webcam, share documents on a white board, share your screen or record meetings. It is available as hosted service or you download and install a package on your server with no limitations in usage or users.



OpenMeetings Key Features Mini Demo





Mikogo is a free desktop sharing tool full of features to assist you in conducting the perfect online meeting or web conference. Take advantage of the opportunity to share any screen content or application over the Internet in true color quality with up to 10 participants simultaneously, while still sitting at your desk.












Yugma free web conferencing allows anyone, anywhere to instantly share their desktop and ideas online with others. To start hosting your own meetings you have to sign up for FREE. Your Yugma Free web conferencing account allows you to invite up to 20 attendees







Using WebHuddle, you have options and flexibility. Meetings can be conducted either in conjunction with an enterprise’s existing teleconferencing service, or utilizing WebHuddle’s optional voice over IP. WebHuddle also offers recording capabilities -- presentations can easily be recorded for playback over any web browser for those who missed the live meeting.










With Vyew you can give a presentation to a hundred people online or post a document you've been working on for review by your colleagues at the convenience. Vyew is extremely flexible alloying you to bring online collaboration and conferencing into your workflow on your terms.









Dimdim delivers synchronized live presentations, whiteboards and web pages while sharing your voice and video over the Internet - with no download. With the Free edition you can get 10 person meetings, 1 way video, standard support, Dimdim branded rooms, and public meetings.



*note: Epignosis has created a module that provides integration of Dimdim conferencing in eFront  Open Source Learning Management System.




Adobe® ConnectNow is a great way to share ideas, discuss details, and complete work with others all online. Reduce travel costs, save time, and increase productivity with a web conferencing solution that's easy to access and simple to use. ConnectNow operates inside a web browser. There's no installation required, so getting started is easy and Free