Usam Virus


Usam is a ransomware virus of the file-encrypting subtype. This means that Usam applies an encryption algorithm on specific target file types when it infects a computer.

Usam Virus

The Usam Virus ransom message

However, these are file types are numerous and pretty much include all the most commonly used formats. For example, Usam will most likely have encrypted your images, videos, music, any office documents, PDFs, etc. And what this means in layman’s terms is that as a result of Usam’s activity on the infected machine, all these files will become inaccessible to the victim. There won’t be a program or software application in existence that could possibly open or read these files, hence you won’t be able to use them.

That is, of course, unless you decide to pay the hackers behind Usam a hefty amount of money in bitcoin (or whatever other cryptocurrency they demand) in exchange for a decryption key. The decryption key, in turn, is unique for each instance of infection. And after you receive it, it is said to reverse the encryption and make your data usable again. But that’s in theory.

In fact, this classic blackmail scheme is quite flawed and there’s actually no guarantee that you will in fact regain access to your precious information. There are many things that can go amiss and we won’t waste your time trying to list them all. But what is important to know is that you also have other options, and none of them will require you to send your hard-earned cash to some anonymous cybercriminals.

We have put together a detailed removal guide for you just below this post, which we encourage you to follow in order to remove Usam from your system. And after you’ve done that, you will reach the second part of the guide, which contains alternative file recovery methods.

The Usam virus

The Usam virus uses a strong encryption algorithm to lock its victims’ files. However, although the process can take a long time to complete, the Usam virus typically runs in the background without exhibiting any symptoms.

Usam Virus

The Usam Virus encrypted data

This is one of the things that makes malware of this type so dangerous. And another is that it usually also won’t trigger a response from your antivirus system, making it all the more treacherous. Some ransomware variants are even capable of disabling your antivirus software altogether.

However, on some occasions it may in fact be possible to intercept a ransomware attack before it’s over. In this case a significant system slowdown is usually what would give the infection away. And if you happen to notice an unfamiliar process using up all of your computer’s CPU and RAM, shut your machine down immediately.

The Usam file distribution

The Usam file distribution can take place using a variety of different means, most commonly malvertisements and spam. And very commonly there’s also a Trojan (Auto Refresh Malware, Wup.exe) or other backdoor virus aiding the Usam file distribution.

So with that in mind, we would also recommend running a full system scan for additional malware after you have dealt with this variant.



Name Usam
Type Ransomware
Danger Level High (Ransomware is by far the worst threat you can encounter)
Symptoms Very few and unnoticeable ones before the ransom notification comes up.
Distribution Method From fake ads and fake system requests to spam emails and contagious web pages.
Data Recovery Tool Not Available
Detection Tool

Remove Usam Ransomware

Usam Virus

Some of the steps will likely require you to exit the page. Bookmark it for later reference.

Reboot in Safe Mode (use this guide if you don’t know how to do it).

Usam Virus


Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab. Try to determine which processes are dangerous. 

Usam Virus

Right click on each of them and select Open File Location. Then scan the files with our free online virus scanner:

Usam Virus
Drag and Drop Files Here to Scan
Maximum file size: 128MB.

This scanner is free and will always remain free for our website's users. You can find its full-page version at:

Scan Results

Virus Scanner Result
Usam VirusClamAV
Usam VirusAVG AV
Usam VirusMaldet

After you open their folder, end the processes that are infected, then delete their folders. 

Note: If you are sure something is part of the infection – delete it, even if the scanner doesn’t flag it. No anti-virus program can detect all infections.

Usam Virus

Hold the Start Key and R –  copy + paste the following and click OK:

notepad %windir%/system32/Drivers/etc/hosts

A new file will open. If you are hacked, there will be a bunch of other IPs connected to you at the bottom. Look at the image below:

Usam Virus

If there are suspicious IPs below “Localhost” – write to us in the comments.

Type msconfig in the search field and hit enter. A window will pop-up:

Usam Virus

Go in Startup —> Uncheck entries that have “Unknown” as Manufacturer.

  • Please note that ransomware may even include a fake Manufacturer name to its process. Make sure you check out every process here is legitimate.

Usam Virus

Type Regedit in the windows search field and press EnterOnce inside, press CTRL and F together and type the virus’s Name. 

Search for the ransomware  in your registries and delete the entries. Be extremely careful –  you can damage your system if you delete entries not related to the ransomware.

Type each of the following in the Windows Search Field:

  1. %AppData%
  2. %LocalAppData%
  3. %ProgramData%
  4. %WinDir%
  5. %Temp%

Delete everything in Temp. The rest just check out for anything recently added. Remember to leave us a comment if you run into any trouble!

Usam Virus 

How to Decrypt Usam files

We have a comprehensive (and daily updated) guide on how to decrypt your files. Check it out here.

If the guide doesn’t help, download the anti-virus program we recommended or try our free online virus scanner. Also, you can always ask us in the comments for help!


About the author


Violet George

Violet is an active writer with a passion for all things cyber security. She enjoys helping victims of computer virus infections remove them and successfully deal with the aftermath of the attacks. But most importantly, Violet makes it her priority to spend time educating people on privacy issues and maintaining the safety of their computers. It is her firm belief that by spreading this information, she can empower web users to effectively protect their personal data and their devices from hackers and cybercriminals.


  • my all files encrypt with .usam extension . unable to decrypt .

    getting message

    File: F:\personal documenys\HOME\PROPERTY TAX.pdf.usam
    No key for New Variant online ID: Xp4EAgHrpqVIqbkFAIq7ylq47e8Y9A7lkv349R6O
    Notice: this ID appears to be an online ID, decryption is impossible
    with emsisoft

    pl help

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