পৃথিবীর সবচেয়ে ভয়ংকর ভাইরাস “Ransomware Virus”

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হ্যালো বন্ধুরা Master Of Hacking (BD) এর পক্ষ থেকে আমি রোটেড ব্রেইন, আজকে আপনাদের সাথে আমি Ransomware Virus নিয়ে আলোচনা করবো।  তো চলুন শুরু করা যাক।

আজকাল আমরা প্রায় প্রত্যেকেই কম্পিউটার নামক বস্তুটির সাথে পরিচিত । প্রাত্যহিক জিবনের বিভিন্ন কাজে এই কম্পিউটার ব্যবহার করি। অনেকে হয়তো অনেক গুরুত্বপুর্ন কাজ করে থাকেন এই কম্পিউটার দিয়ে। তো ধরুন প্রতিদিন কার মতো আপনি যথারীতি আপনার কাজ শেষ করে আপনার সাধের কম্পিউটারটিকে বন্ধ করে ঘুমিয়ে পড়লেন । এবং পরদিন কাজের সময় কম্পিউটার চালু করে দেখলেন যে আপনি Ransomware Virus এ আক্রান্ত হয়েছেন এবং স্ক্রিনের অনেকটা এই রকমের Your Computer Has Been Locked, To Unlock The Computer You are obliged to pay a fine of $500. You have to 72 hours to pay the fine, otherwise all data of computer will be removed)  কিছু লেখা দেখতে পেলেন যা দেখে আপনার চোখ দুটো কপালে উঠে গেলো !

আসলে এর মানে হচ্ছে আপনি Ransomware Virus নামের একধরনের ম্যালওয়্যার ভাইরাস দ্বারা আক্রান্ত । যেটি আপনার পুরো কম্পিউটারটি লক করে দিয়েছে।  ভাবতেছেন এখন আপনি কি করবেন ? সত্যি কথা বলতে এখন এই ভাইরাসের হাত থেকে আপনার কম্পিউটারকে উদ্ধার করার জন্য ওদের কথা মত কাজ করা ছাড়া আর তেমন কিছুই করার নেই ! আর শেষ পর্যন্ত আর কোনো উপায় না পেয়ে যদি চিন্তা করে যে হ্যাকারের ডিমান্ড অনুযায়ী আপনি অর্থ পরিশোধ করবেন সেক্ষেত্রেও একটি সমস্যা হচ্ছে আপনি অর্থ পরিশোধ করার পর সেই হ্যাকার কি আদো আপনার সকল ফাইল বা সব কিছু ঠিকঠাক ভাবে ফিরত দিবে কিনা সেটারও কিন্তু কোনো গেরান্টি নেই !

আমরা প্রায় সবাই ভাইরাস, ট্রোজান হর্স, ওর্ম, রুটকিট, ম্যালওয়ার, স্পাইওয়ার ইত্যাদির কথা শুনে থাকবেন, এগুলোকে এক কথায় ভাইরাস বলে সবাই বুঝে থাকেন।

আজকে আমি আপনাদের সাথে এই Ransomware ভাইরাস সম্পর্কে বিস্তারিত আলোচনা করার চেস্টা করবো । আশা করি সবার মনোযোগ সহকারে পড়বেন। কারো কোন বিষয় বুজতে সমস্যা হলে কমেন্ট করবেন ।

👉 Ransomware Virus ভাইরাস কি ? 

Ransomware হচ্ছে একধরনের অত্যাধুনিক ম্যালওয়্যার প্রোগ্রাম যা আপনাকে আপনার কম্পিউটারের সকল ফাইল আক্সেস করা থেকে ব্লক করে দিবে।

👉 Ransomware সাধারনত ভাইরাস ২ ধরনের হয়ে থাকেঃ-
 ১)  Encrypting ransomware :- যার মধ্যে উন্নত মানের এনক্রিপশন অ্যালগোরিদম অন্তর্ভুক্ত। এটা এমন ভাবে তৈরী করা হয়ে থাকে যাতে করে কম্পিউটার ইউজারকে সিস্টেম ফাইল আক্সেস থেকে ব্লক করে দেয়। যার ফলে কম্পিউটার ইউজার আর তার কম্পিউটারের ফাইলগুলো এক্সেস করতে পারে না এবং কম্পিউটার ইউজারের কাছ থেকে বড় অংকের টাকা দাবি করে তার সব ফাইল পুনরায় ফিরিয়ে দেয়ার জন্য। এই রকম কিছু ransomware ভাইরাস হচ্ছেঃ- CryptoLocker, Locky, CrytpoWall  ইত্যাদি ।

২)  Locker ransomware:-  এটি কম্পিউটারের পুরো অপারেটিং সিস্টেমকে লক করে দেয়। যার ফলে কোনো ফাইল বা প্রোগ্রাম ওপেন করা অসম্ভব হয়ে পড়ে । এক্ষেত্রে কম্পিটারের ফাইলগুলো এনক্রিপ হয়না ঠিকই কিন্তু আক্রমনকারী মোটা অঙ্ককের টাকা দাবী করে থাকে কম্পিউটার আনলক করার জন্য । এই রকম কিছু ransomware ভাইরাস হচ্ছেঃ- Police-themed Ransomware or Winlocker.

 

👉 কোথা থেকে আসে এইransomware ভাইরাস ?

এই ভাইরাস গুলো এমন কিছু স্ক্যামারা তৈরী করে যারা কম্পিউটার প্রোগ্রামিং এ অত্যন্ত জ্ঞানসম্পন্ন । এই ভাইরাস গুলো সাধারণত ইমেইল এ ফাইল হিসেবে সংযুক্ত করে পাঠানো হয় অথবা এই ভাইরাস আক্রান্ত কোনো ওয়েবসাইট ভিজিট করলেও এই ভাইরাস আপনার পিসিতে বাসা বাধতে পারে।

👉 কিভাবে বুজবেন যে আপনি এই ভাইরাস দ্বারা আক্রান্ত কিনা ?

আসলে সেটা বুজা খুবই সোজা কারন এই ভাইরাস দ্বারা আক্রান্ত হওয়ার পর আপনি আপনার কম্পিউটারের কোন ফাইলই এক্সেস করতে পারবেন না । :p

👉 কিভাবে এই ধরনের ভাইরাসের আক্রমন প্রতিরোধ করবেন ?

⇢ নিয়মিত আপনার কম্পিঊটারের সকল সফটওয়্যার আপ-টু-ডেট কিনা সেটা চেক করুন । যেমনঃ অপারেটিং সিস্টেম, ব্রাউজার, অন্যান্য প্লাগিন।

⇢ একান্ত প্রয়োজন না হলে বাইরের কোন ফ্ল্যাশ অথবা পেনড্রাইভ ব্যবহার না করা। বিশেষ প্রয়োজনে বাইরের ফ্ল্যাশ অথবা পেনড্রাইভ ব্যবহার করার আগে অবশ্যই আপডেটেড কোন এন্টিভাইরাসের স্ক্যানার দিয়ে স্ক্যান করে নেয়া। ভাইরাস পেলে তা রিমুভ, কিল, হিল বা ডিলেট করে নেয়া।

⇢ সিডি বা ডিভিডি ব্যবহারের পূর্বে এন্টিভাইরাসের স্ক্যানের মাধ্যামে স্ক্যানের পর তাতে ভাইরাস ধরা পড়লে ওই সিডি/ডিভিডি ব্যবহার না করা। কারণ সিডি/ডিভিডিতে ডাটা রাইট করার সময় ভাইরাস ঢুকে যায় এবং পরে ভাইরাস পাওয়া গেলেও তা মুছা অসম্ভব।

⇢ প্রতিদিন কাজের শেষে প্রয়োজনীয় ডাটার ব্যাকআপ রাখা। ব্যাকআপ রাখার পূর্বে যে স্থানে ব্যাকআপটি নেয়া হচ্ছে সেটি ভাইরাসমুক্ত কিনা তা দেখে নেওয়া।
⇢ ই-মেইল এ অপরিচিত এটাচমেন্ট ফাইল খোলার ব্যাপারে সর্তক হওয়া।
⇢  আপনার এন্টি-ভাইরাস এবং অপারেটিং সিস্টেমের ফায়ার-ওয়াল সক্রিয় কিনা সেটি নিশ্চিত করুন।
⇢ ওয়েবে ”টরেন্ট” জাতীয় সাইট হতে ফাইল নামানোর ক্ষেত্রে সতর্ক থাকা। এ ধরণের সাইটে নানা ধরণের ভাইরাস লুকিয়ে থাকতে পারে।
⇢  অযথা অপ্রয়োজনীয় ফ্রি সফটওয়্যার বা ডেমো সফটওয়্যার ব্যবহার না করা।
⇢  পাইরেটেড সফটওয়্যার ব্যবহার না করা। কারণ এজাতীয় সফটওয়্যারগুলোকে একটিভ করার জন্য এদের সাথে কী-জেন (Keygen) জাতীয় প্রোগ্রাম দিয়ে দেওয়া হয়। এগুলোর মধ্যে ভাইরাস থাকার সম্ভাবনা প্রবল।

তো বন্ধুরা আজকে এই পর্যন্তই । আগামীতে আবার দেখা হবে নতুন কোনো টপিক নিয়ে… 😊
সবাই ভালো থাকবেন এবং অবশ্যই Master Of Hacking (BD) এর সাথেই থাকবেন।

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