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Ransomware

LLTP (Locker) Ransomware – Remove It and Decrypt Files

The Review

80% High Danger Level

LLTP or LLTP Locker ransomware is a reworked version of VenusLocker ransomware. It implements a combination of AES and RSA enciphering algorithms to encrypt target data and make it inaccessible. Depending on the original file extension LLTP appends a different malicious extension to the encrypted files - .ENCRYPTED_BY_LLTP and .ENCRYPTED_BY_LLTPp. LLTP also drops several files that contain its ransom note message. They demand a ransom payment of $200 in BTC.

DOWNLOAD LLTP RANSOMWARE REMOVAL TOOL.

80%

LLTP or LLTP Locker ransomware is a terrific crypto virus that not only encrypts your files but adds them to an archive file which is also password protected. According to the security researchers who have analyzed its samples, the threat is a reworked version of VenusLocker ransomware. LLTP is designed to implement a combination of AES and RSA enciphering algorithms to encrypt target data and make it inaccessible. Depending on the original file extension LLTP appends a different malicious extension to the encrypted files. LLTP also drops several files that contain the ransom note message left by the hackers. They demand a ransom payment of $200 in BTC.

LLTP ransomware desktop image background ransom note bestsecuritysearch bss

What Damage the LLTP Ransomware Causes over an Infected PC

An executable file LLTP.exe starts the infection process once it is running on the system. First, it connects its Command & Control server and sends information about the name of the infected PC and the current user name. Afterward, the server sends back an AES password used for the encryption and an ID that is then displayed on the ransom notes.

The threat can work either in online or offline mode. So if there is no Internet connection, the ransomware generates this information itself, and it will encrypt files no matter whether you are connected to the Internet or not.

Next the LLTP ransomware initializeс the encryption process and corrupts particular files with the help of RSA-4096 encryption. It is unusual that this ransomware family appends different malicious extension depending on the original file extension. Thus LLTP utilizes the extension .ENCRYPTED_BY_LLTP whenever it encrypts file with one of the following extensions:

.txt, .ini, .php, .html, .css, .py, .c, .cxx, .aspx, .cpp, .cc, .h, .cs, .sln, .log, .pl, .java, .doc, .dot, .docx, .docm, .dotx, .dotm, .rtf, .wpd, .docb, .wps, .msg, .xls, .xlt, .xlm, .xlsx, .xlsm, .xltx, .xltm, xlsb, .xla, .xlam, .xll, .xlw, .ppt, .pot, .pps, .pptx, .pptm, .potx, .potm, .ppam, .ppsx, .ppsm, .sldx, .sldm, .class, .jar, .csv, .xml, .dwg, .dxf, .asp

The malicious extension .ENCRYPTED_BY_LLTPp is used in case that the encrypted file’s original extension belongs to one of the mentioned extensions below:

.asf, .pdf, .xls, .docx, .xlsx, .mp3, .waw, .jpg, .jpeg, .txt, .ost, .oab, .jsp, .rtf, .doc, .rar, .zip, .psd, .tif, .wma, .gif, .bmp, .ppt, .pptx, .docm, .xlsm, .pps, .ppsx, .ppd, .eps, .png, .ace, .djvu, .tar, .cdr, .max, .wmv, .avi, .wav, .mp4, .pdd, .php, .aac, .ac3, .amf, .amr, .dwg, .dxf, .accdb, .mod, .tax2013, .tax2014, .oga, .ogg, .pbf, .ra, .raw, .saf, .val, .wave, .wow, .wpk, .3g2, .3gp, .3gp2, .3mm, .amx, .rpt, .avs, .bik, .dir, .divx, .dvx, .evo, .flv, .qtq, .tch, .rts, .rum, .rv, .scn, .srt, .stx, .svi, .swf, .trp, .vdo, .wm, .wmd, .wmmp, .wmx, .wvx, .xvid, .3d, .3d4, .3df8, .pbs, .adi, .ais, .amu, .arr, .bmc, .bmf, .cag, .cam, .dng, .ink, .ini, .jif, .jiff, .jpc, .jpf, .jpw, .mag, .mic, .mip, .msp, .nav, .ncd, .odc, .odi, .opf, .qif, .xwd, .abw, .act, .adt, .aim, .ans, .asc, .ase, .bdp, .bdr, .bib, .boc, .crd, .diz, .dot, .dotm, .dotx, .dvi, .dxe, .mlx, .err, .euc, .faq, .fdr, .fds, .gthr, .idx, .kwd, .lp2, .ltr, .man, .mbox, .msg, .nfo, .now, .odm, .oft, .pwi, .rng, .rtx, .run, .ssa, .text, .unx, .wbk, .wsh, .7z, .arc, .ari, .arj, .car, .cbr, .cbz, .gz, .gzig, .jgz, .pak, .pcv, .puz, .rev, .sdn, .sen, .sfs, .sfx, .sh, .shar, .shr, .sqx, .tbz2, .tg, .tlz, .vsi, .wad, .war, .xpi, .z02, .z04, .zap, .zipx, .zoo, .ipa, .isu, .jar, .js, .udf, .adr, .ap, .aro, .asa, .ascx, .ashx, .asmx, .asp, .indd, .asr, .qbb, .bml, .cer, .cms, .crt, .dap, .htm, .moz, .svr, .url, .wdgt, .abk, .bic, .big, .blp, .bsp, .cgf, .chk, .col, .cty, .dem, .elf, .ff, .gam, .grf, .h3m, .h4r, .iwd, .ldb, .lgp, .lvl, .map, .md3, .mdl, .nds, .pbp, .ppf, .pwf, .pxp, .sad, .sav, .scm, .scx, .sdt, .spr, .sud, .uax, .umx, .unr, .uop, .usa, .usx, .ut2, .ut3, .utc, .utx, .uvx, .uxx, .vmf, .vtf, .w3g, .w3x, .wtd, .wtf, .ccd, .cd, .cso, .disk, .dmg, .dvd, .fcd, .flp, .img, .isz, .mdf, .mds, .nrg, .nri, .vcd, .vhd, .snp, .bkf, .ade, .adpb, .dic, .cch, .ctt, .dal, .ddc, .ddcx, .dex, .dif, .dii, .itdb, .itl, .kmz, .lcd, .lcf, .mbx, .mdn, .odf, .odp, .ods, .pab, .pkb, .pkh, .pot, .potx, .pptm, .psa, .qdf, .qel, .rgn, .rrt, .rsw, .rte, .sdb, .sdc, .sds, .sql, .stt, .tcx, .thmx, .txd, .txf, .upoi, .vmt, .wks, .wmdb, .xl, .xlc, .xlr, .xlsb, .xltx, .ltm, .xlwx, .mcd, .cap, .cc, .cod, .cp, .cpp, .cs, .csi, .dcp, .dcu, .dev, .dob, .dox, .dpk, .dpl, .dpr, .dsk, .dsp, .eql, .ex, .f90, .fla, .for, .fpp, .jav, .java, .lbi, .owl, .pl, .plc, .pli, .pm, .res, .rsrc, .so, .swd, .tpu, .tpx, .tu, .tur, .vc, .yab, .aip, .amxx, .ape, .api, .mxp, .oxt, .qpx, .qtr, .xla, .xlam, .xll, .xlv, .xpt, .cfg, .cwf, .dbb, .slt, .bp2, .bp3, .bpl, .clr, .dbx, .jc, .potm, .ppsm, .prc, .prt, .shw, .std, .ver, .wpl, .xlm, .yps, .1cd, .bck, .html, .bak, .odt, .pst, .log, .mpg, .mpeg, .odb, .wps, .xlk, .mdb, .dxg, .wpd, .wb2, .dbf, .ai, .3fr, .arw, .srf, .sr2, .bay, .crw, .cr2, .dcr, .kdc, .erf, .mef, .mrw, .nef, .nrw, .orf, .raf, .rwl, .rw2, .r3d, .ptx, .pef, .srw, .x3f, .der, .pem, .pfx, .p12, .p7b, .p7c, .jfif, .exif, .docb, .xlt, .xltm, .xlw, .ppam, .sldx, .sldm, .class, .db, .pdb, .dat, .csv, .xml, .spv, .grle, .sv5, .game, .slot, .aaf, .aep, .aepx, .plb, .prel, .prproj, .eat, .ppj, .indl, .indt, .indb, .inx, .idml, .pmd, .xqx, .svg, .as3, .as

The original filenames are also Base64 encoded. And as an example the corrupted file Voyage.jpg will be renamed to Vm95YWdl.ENCRYPTED_BY_LLTPp. To make its impact worse the LLTP ransomware puts all encrypted files in a .RAR archive which is locked with a password.

Upon encryption, LLTP drops a text ransom note ReadMe.txt on the desktop. In it, the LLTP Locker team explains what has just happened to your system and data, how to act further into paying the ransom and an exact Bitcoin address. The text is the same as this presented on the VenusLocker ransom note except the name, and it reads:

— THE LLTP RANSOMWARE —
Unfortunately, you are hacked.
1. What happened to my files?
Your personal files, including your photos, documents, videos and other important files on this computer, have been encrypted with RSA-4096, the strongest encryption algorithm. RSA algorithm generates a public key and a private key for your computer. The public key was used to encrypt your files a moment ago. The private key is necessary for you to decrypt and recover your files. Now, your private key is stored on our secret Internet server. And there is no doubt that no one can recover your files without your private key.
For further information about RSA algorithm, please refer to https://en.wikipedia.org/wiki/RSA_(cryptosystem)
2. How to decrypt my files?
To decrypt and recover your files, you have to pay #ramt# US Dollars for the private key and decryption service. Please note that you have ONLY 72 HOURS to complete your payment. If your payment do not be completed within time limit, your private key will be deleted automatically by our server. All your files will be permanently encrypted and nobody can recover them. Therefore, it is advised that you’d better not waste your time, because there is no other way to recover your files except making a payment.
3. How to pay for my private key?
There are three steps to make a payment and recover your files:
1). For the security of transactions, all the payments must be completed via Bitcoin network. Thus, you need to exchange #ramt# US dollars (or equivalent local currencies) to Bitcoins, and then send these Bitcoins (about #btc# BTC) to the following address. 19fhNi9L2aYXTaTFWueRhJYGsGDaN6WGcP
2). Send your personal ID to our official email: [email protected]
Your personal ID is: #id#
3). You will receive a decryptor and your private key to recover all your files within one working day.
4. What is Bitcoin?
Bitcoin is an innovative payment network and a new kind of money. It is based on an open-source cryptographic protocol that is independent of any central authority. Bitcoins can be transferred through a computer or a smartphone withour an intermediate financial institution.
5. How to make a payment with Bitcoin?
You can make a payment with Bitcoin based on Bitcoin Wallet or Based on Perfect Money. You can choose the way that is more convenient for you.
About Based on Bitcoin Wallet
1) Create a Bitcoin Wallet. We recommend Blockchain.info (https://blockchain.info/)
2) Buy necessary amount of Bitcoins. Our recommendations are as follows.
LocalBitcoins.com — the fastest and easiest way to buy and sell Bitcoins.
CoinCafe.com — the simplest and fastest way to buy, sell and use Bitcoins.
BTCDirect.eu — the best for Europe.
CEX.IO — Visa / MasterCard
CoinMama.com — Visa / MasterCard
HowToBuyBitcoins.info — discover quickly how to buy and sell Bitcoins in your local currency.
3) As mentioned above, send about #btc# BTC (equivalent to #ramt# USD) to our Bitcoin receiving address.
4) As mentioned above, and then, send us your personal ID via email, you will receive your private key soon.
About Based on Perfect Money
1) Create a Perfect Money account. (https://perfectmoney.is)
2) Visit to PMBitcoin.com. (https://pmbitcoin.com/btc)
input our Bitcoin receiving address in the “Bitcoin Wallet” textbox.
input #ramt# in the “Amount” textbox, the amount of Bitcoin will be calculated automatically.
click “PAY” button, then you can complete you payment with your Perfect Money account and local debit card.
6. If you have any problem, please feel free to contact us via official email.
Best Regards
The LLTP Locker Team

At the last infection stage, the LLTP downloads a jpg file and replace the current desktop background with it. It also serves as a ransom message left by the hackers. In exchange for the decryption key and the password for the RAR file, they demand 2.00 BTC be sent to their Bitcoin address. To act further victims should send the extortionists an email with their personal ID to [email protected]

Currently all malicious files associated with LLTP ransomware are:

  • LLTP.exe
  • LLTP3.5.exe
  • ReadMe.txt
  • [random].exe
  • [random].tmp
  • [random].doc.exe
  • [random].exe.tmp

Additionally, it modifies some Windows registries to improve its performance and malicious activities.

  • HKEY_CURRENT_USER\Software\Microsoft\Windows\Current Version\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\Current Version\RunOnce
  • HKEY_CURRENT_USER\Control Panel\Desktop

The good news is that several folders remain uninfected by the threat. They are:

Program Files, Program Files (x86), Windows, Python27, Python34, AliWangWang, Avira, wamp, Avira, 360, ATI, Google, Intel, Internet Explorer, Kaspersky Lab, Microsoft.NET, MicrosoftBAF, MSBuild, QQMailPlugin, Realtek, Skype, Reference Assemblies, Tencent, USB Camera2, Microsoft Bing Pinyin, Microsoft Chart Controls, Microsoft Games, Microsoft Office, WinRAR, Windows Sidebar, Windows Portable Devices, Windows Photo Viewer, Windows NT, Windows Media Player, Windows Mail, NVIDIA Corporation, Adobe, IObit, AVAST Software, CCleaner, AVG, Mozilla Firefox, VirtualDJ, TeamViewer, ICQ, java, Yahoo!

Spread Techniques of LLTP Ransomware

The payloads of LLTP threat may be included in spam email campaigns. Usually, emails are sent by unknown sources and contain obscure attachments. Some phishing emails are also likely to be used for LLTP distribution. Always think twice before you click on the presented links and attachments in such emails. The links may redirect you to a compromised web page (even legit website) and infect your PC with LLTP ransomware via a drive-by-download attack. The attachments may start the infection process once you download and open them.

Another way of LLTP ransomware distribution may be scam posts and messages with compromised link and files spread around social networks like Facebook and Twitter.

It is also possible hackers to bundle the malicious payload with the installer of a free software.

Summary of LLTP Ransomware

 


Name
LLTP Ransomware

File Extension
.ENCRYPTED_BY_LLTP and .ENCRYPTED_BY_LLTPp

Ransom
$200 in BTC

Easy Solution
You can skip all steps and remove LLTP ransomware with the help of an anti-malware tool.

Manual Solution
LLTP ransomware can be removed manually, though it can be very hard for most home users. See the detailed tutorial below.

Distribution
Spam emails, malicious URLs, malicious attacments, exploit kits, freeware.

LLTP Ransomware Removal

STEP I: Start the PC in Safe Mode with Network
This will isolate all files and objects created by the ransomware so they will be removed efficiently.

    1) Hit WIN Key + R

Windows-key-plus-R-button-launch-Run-Box-in-Windows-illustrated

    2) A Run window will appear. In it, write “msconfig” and then press Enter
    3) A Configuration box shall appear. In it Choose the tab named “Boot
    4) Mark “Safe Boot” option and then go to “Network” under it to tick it too
    5) Apply -> OK

Or check our video guide – “How to start PC in Safe Mode with Networking

STEP II: Show Hidden Files

    1) Open My Computer/This PC
    2) Windows 7

      – Click on “Organize” button
      – Select “Folder and search options
      – Select the “View” tab
      – Go under “Hidden files and folders” and mark “Show hidden files and folders” option

    3) Windows 8/ 10

      – Open “View” tab
      – Mark “Hidden items” option

    show-hidden-files-win8-10

    4) Click “Apply” and then “OK” button

STEP III: Enter Windows Task Manager and Stop Malicious Processes

    1) Hit the following key combination: CTRL+SHIFT+ESC
    2) Get over to “Processes
    3) When you find suspicious process right click on it and select “Open File Location
    4) Go back to Task Manager and end the malicious process. Right click on it again and choose “End Process
    5) Next you should go folder where the malicious file is located and delete it

STEP IV: Remove Completely LLTP Ransomware Using SpyHunter Anti-Malware Tool

Manual removal of LLTP requires being familiar with system files and registries. Removal of any important data can lead to permanent system damage. Prevent this troublesome effect – delete LLTP ransomware with SpyHunter malware removal tool.

SpyHunter anti-malware tool will diagnose all current threats on the computer. By purchasing the full version, you will be able to remove all malware threats instantly. Additional information about SpyHunter / Help to uninstall SpyHunter

STEP V: Repair Windows Registry

    1) Again type simultaneously the Windows Button + R key combination
    2) In the box, write “regedit”(without the inverted commas) and hit Enter
    3) Type the CTRL+F and then write the malicious name in the search type field to locate the malicious executable
    4) In case you have discovered registry keys and values related to the name, you should delete them, but be careful not to delete legitimate keys

Further help for Windows Registry repair

STEP VI: Recover Encrypted Files

    1) Use present backups
    2) Use professional data recovery software

      Stellar Phoenix Data Recovery – a specialist tool that can restore partitions, data, documents, photos, and 300 more file types lost during various types of incidents and corruption.
      Data Recovery Pro by ParetoLogic – a Microsoft Partner program that is very powerful. It can recover not only local files but also deleted emails and connected drives.
    3) Using System Restore Point

      – Hit WIN Key
      – Select “Open System Restore” and follow the steps


restore-files-using-system-restore-point

    4) Restore your personal files using File History

      – Hit WIN Key
      – Type “restore your files” in the search box
      – Select “Restore your files with File History
      – Choose a folder or type the name of the file in the search bar

    restore-your-personal-files-using-File-History-bestecuritysearch

      – Hit the “Restore” button

STEP VII: Preventive Security Measures

    1) Enable and properly configure your Firewall.
    2) Install and maintain reliable anti-malware software.
    3) Secure your web browser.
    4) Check regularly for available software updates and apply them.
    5) Disable macros in Office documents.
    6) Use strong passwords.
    7) Don’t open attachments or click on links unless you’re certain they’re safe.
    8) Backup regularly your data.
For a faster solution, you can run a scan with an advanced malware removal tool and delete LLTP Ransomware completely with a few mouse clicks.

SpyHunter anti-malware tool will diagnose all current threats on the computer. By purchasing the full version, you will be able to remove all malware threats instantly. Additional information about SpyHunter / Help to uninstall SpyHunter

Gergana Ivanova

Gergana Ivanova is computer security enthusiast. She is a member of Best Security Search team and enjoys presenting the latest news on cyber-security and cyber-threat issues.