What is Dont_Worry ransomware? And how does it execute its attack?
Dont_Worry ransomware is a newly discovered crypto-malware which belongs to the AMBA ransomware group. And it seems like it is a customized version based on its code that can be modified and updated easily. The first variant of this ransomware group was released on April 2018 and apparently, the cybercriminals behind this ransomware group are at it again as a new variant was spotted recently. According to security experts, the victims were mainly from Russia which means that this ransomware mostly targets Russian users.
During the execution of its attack, Dont_Worry ransomware begins with an information gathering module that is programmed to harvest various kinds of information about the compromised machine. The information gathered is classified into two types namely:
- Anonymous information – this includes data about the hardware components of the infected computer as well as all the installed programs in it.
- Personal information – this includes the information related to users of the infected computer such as name, address, passwords, etc.
The harvested data can be used to launch a separate stealth protection component which is used to bypass programs installed in the system that could interfered with Dont_Worry ransomware’s attack like antivirus programs. Once all the components of this ransomware are loaded, it will use a predefined list of targeted file types in searching for files to encrypt and Dont_Worry ransomware is quite peculiar as it targets dozens and dozens of files some of which are files with the following extensions:
.$$$, .[0-9]+, .~ini, .~klt, .1cd, .1cd2, .1cl, .1ey, .1txt, .2, .2cd, .6t[0-9]*, .6tr, .7z, .7zip, .8t0, .8tr, .9tr, .a2u, .a3d, .aad, .abd, .accdb, .adb, .adi, .afd, .ai, .als, .amp, .amr, .ans, .apc, .apk, .apx, .arc, .arch, .arh, .arj, .atc, .atg, .ava, .avhd, .avhdx, .awr, .axx, .bac[0-9]*, .backup, .bak, .bck, .bco, .bcp, .bde, .bdf, .bdf, .bf, .bf3, .bg, .bip, .bkc, .bkf, .bkp, .bks, .blb, .blf, .blk, .bln, .bls, .bls, .bmp, .box, .bpl, .bpn, .btr, .burn, .bz, .bz2, .car, .cbf, .cbm, .cbu, .cdb, .cdr, .cdx, .cer, .cf, .cfl, .cfu, .cia, .cmt, .cnc, .cpr, .cr2, .cripted, .criptfiles, .crypt, .csv, .ctl, .ctlg, .cuc, .cui, .cuix, .custom, .dafile, .data, .db, .db[0-9]*, .dbf, .dbk, .dbs, .dbt, .dbx, .dcf, .dcl, .dcm, .dct, .dcu, .dd, .ddf, .ddt, .dfb, .dff, .dfp, .dgdat, .dic, .diff, .dis, .djvu, .dmp, .doc, .docx, .dot, .dpr, .dproj, .drs, .dsus, .dt, .dtz, .dump, .dwg, .dz, .ect, .edb, .efd, .efm, .eif, .elf, .eml, .enc, .enz, .epf, .eps, .erf, .ert, .esbak, .esl, .eso, .etw, .export, .fbf, .fbk, .fdb, .fdb[0-9]*, .fi, .fil, .fkc, .fld, .flx, .fob, .fpf, .fpt, .frf, .frm, .frp, .frw, .frx, .fxp, .gbk, .gbp, .gd, .gdb, .gdoc, .gfd, .gfo, .gfr, .gho, .ghost, .ghs, .gif, .gopaymeb, .gpd, .granit, .grd, .gsheet, .gsn, .gz, .gzip, .hbi, .hbk, .hdf, .his, .hive, .htm, .html, .ib, .idf, .idx, .ifm, .ifo, .ifs, .ima, .img, .imgc, .imh, .imm, .indd, .info, .ipa, .ips, .irsf, .irsi, .irss, .iso,
The file types listed above is just half of the entire list of extensions that Dont_Worry ransomware targets. Once it finds all the files it’s looking for, it will encrypt them using both the RSA and AES ciphers. After the encryption is accomplished, it delivers a ransom note in a file named “Don’t_Worry.txt” that contains the following message written in Russian:
“Вся Ваша информация на этом компьютере была зашифрована.
Для расшифровки обратитесь по нижеуказанным контактам.
e-mail: [email protected]
Ваш код для разблокировки: 42943870
Если Вам приходит ответ, что почтовый адрес не существует:
- Вам не повезло. Адрес заблокировали.
Все инструкции вы получите в ответном письме.
Here’s the English translation of the ransom note:
“All your information on this computer has been encrypted.
To decrypt refer to the contacts listed below.
e-mail: [email protected]
Your code for unlocking: 42943870
If you receive an answer that the mailing address does not exist:
- You are unlucky. The address was blocked.
You will receive all instructions in the reply letter.
How is the malicious payload of Dont_Worry ransomware disseminated?
The malicious payload of this file-encrypting threat is disseminated via spam emails that contain infected attachments or hyperlink used to launch Dont_Worry ransomware into the targeted machine. This is why you must stir clear of any suspicious-looking emails and delete them as soon as you spot them in your inbox.
Terminate Dont_Worry ransomware by using the given removal guide below.
Step 1: Launch the Task Manager by simply tapping Ctrl + Shift + Esc keys on your keyboard.
Step 2: Under the Task Manager, go to the Processes tab and look for any suspicious-looking process which takes up most of your CPU’s resources and is most likely related to Dont_Worry ransomware.
Step 3: After that, close the Task Manager.
Step 4: Tap Win + R, type in appwiz.cpl and click OK or tap Enter to open Control Panel’s list of installed programs.
Step 5: Under the list of installed programs, look for Dont_Worry ransomware or anything similar and then uninstall it.
Step 6: Next, close Control Panel and tap Win + E keys to launch File Explorer.
Step 7: Navigate to the following locations below and look for Dont_Worry ransomware’s malicious components such as dwintl_x64.exe, gwintl.exe, dwintl.exe and Dont_Worry.txt and other suspicious files, then delete all of them.
Step 8: Close the File Explorer.
Before you proceed to the next steps below, make sure that you are tech savvy enough to the point where you know exactly how to use and navigate your computer’s Registry. Keep in mind that any changes you make will highly impact your computer. To save you the trouble and time, you can just use [product-name], this system tool is proven to be safe and excellent enough that hackers won’t be able to hack into it. But if you can manage Windows Registry well, then, by all means, go on to the next steps.
Step 9: Tap Win + R to open Run and then type in regedit in the field and tap enter to pull up Windows Registry.
Step 10: Navigate to the following path:
- HKEY_CURRENT_USER\Control Panel\Desktop\
- HKEY_USERS\.DEFAULT\Control Panel\Desktop\
Step 11: Delete the registry keys and sub-keys created by Dont_Worry ransomware.
Step 12: Close the Registry Editor and empty the Recycle Bin.
Try to recover your encrypted files using the Volume Shadow copies
Restoring your encrypted files using Windows’ Previous Versions feature will only be effective if Dont_Worry ransomware hasn’t deleted the shadow copies of your files. But still, this is one of the best and free methods there is, so it’s definitely worth a shot.
To restore the encrypted file, right-click on it and select Properties, a new window will pop-up, then proceed to Previous Versions. It will load the file’s previous version before it was modified. After it loads, select any of the previous versions displayed on the list like the one in the illustration below. And then click the Restore button.
Complete the removal process of Dont_Worry ransomware by using a trusted and reliable program like [product-name]. Refer to the following guidelines on how to use it.
Perform a full system scan using [product-code]. To do so, follow these steps:
- Turn on your computer. If it’s already on, you have to reboot
- After that, the BIOS screen will be displayed, but if Windows pops up instead, reboot your computer and try again. Once you’re on the BIOS screen, repeat pressing F8, by doing so the Advanced Option shows up.
- To navigate the Advanced Option use the arrow keys and select Safe Mode with Networking then hit
- Windows will now load the SafeMode with Networking.
- Press and hold both R key and Windows key.
- If done correctly, the Windows Run Box will show up.
- Type in the URL address, [product-url] in the Run dialog box and then tap Enter or click OK.
- After that, it will download the program. Wait for the download to finish and then open the launcher to install the program.
- Once the installation process is completed, run [product-code] to perform a full system scan.