The Dangerous Assumption — “It Won’t Happen to Me”
In today’s digital world, ransomware is no longer just something you see on the news. It’s a real and growing threat — not only for corporations but also for individuals. From small business POS systems to home NAS servers, ransomware doesn’t discriminate.
The bigger issue? Most people don’t know what to do when they actually see a ransom note pop up on their screen. Without a clear backup or response plan, the damage can escalate rapidly. In this article, we break down real-world ransomware attack scenarios and provide step-by-step guidance for both immediate response and proactive prevention — based on the latest 2025 trends.
How Does Ransomware Infect Your Devices?
Ransomware doesn’t appear magically. It exploits human error, poor habits, or outdated systems. Here are the most common infection vectors:
▸ Email Attachments & Phishing Links
Still the most effective method. Attackers use social engineering to make emails look legitimate and convincing.
Real-world example: You receive an email titled “Urgent Quotation” or “Tax Notice,” with an attachment like invoice.pdf.exe. It looks like a normal PDF or Excel file but is actually an executable with ransomware hidden inside. Once you open it or click “Enable Content,” the malware installs silently in the background.
▸ Cracked Software & Pirated Downloads
Hackers take advantage of people seeking free software or media.
Real-world example: You download a cracked version of Photoshop or Office via torrent. Inside the folder is a file like keygen.exe, and a note tells you to “disable antivirus before running.” The moment you do, you unknowingly run ransomware — having already disabled your own defenses.
▸ Unpatched System Vulnerabilities
Ransomware can infect systems without any user interaction by exploiting known vulnerabilities.
Real-world example: The infamous WannaCry attack used the “EternalBlue” SMB vulnerability in Windows. PCs without the security patch were remotely infected and encrypted — all without the user clicking anything. Delaying Windows or browser updates leaves your system exposed.
▸ Exposed RDP Ports & Weak Passwords
Remote Desktop Protocol (RDP, Port 3389) is often left open for remote work.
Real-world example: A weak password like 123456 or admin on an RDP account can be brute-forced by hackers. Once inside, they disable antivirus and manually launch ransomware to encrypt all files. This is especially common in small businesses.
▸ Default Passwords on NAS & IoT Devices
Unchanged default credentials on NAS (like Synology/QNAP) or IP cameras can be exploited.
Real-world example: Many users leave the default admin/admin credentials unchanged on their NAS. Hackers log in, upload ransomware to the embedded Linux system, and encrypt family photos, work files, and even backup archives.
What to Do Immediately After Infection: The 5 Golden Steps
If you suspect a ransomware infection, time is critical. Follow these steps right away:
-
Disconnect from the network (ASAP): Unplug your router or Ethernet cable immediately to prevent spread to other devices or cloud backups.
-
Remove external storage: Disconnect USB drives, external hard drives, and SD cards. Even if not opened, connected devices can be encrypted.
-
Check the infection details: Are file extensions renamed (e.g.,
.abcxyz)? Is there aREADME.txtorHOW_TO_DECRYPT.htmlfile? Take a photo of the ransom note if needed. -
Search for a decryptor: Visit trusted sites like NoMoreRansom.org or your country’s CERT page to check if a decryptor is available for your ransomware variant.
-
Decide: Format or hire a recovery expert:
-
If no decryptor is available and the data is critical, consult a professional forensic service.
-
Otherwise, wipe (format) the device and restore from a clean backup.
-
⚠️ Never pay the ransom or run unknown “recovery tools.” Many are scams or malware in disguise.
How to Back Up Properly: The 3-2-1 Backup Strategy
If you hesitate when asked “Do you have a backup?” — you’re already at risk.
The best defense is the 3-2-1 Backup Principle:
-
3 copies of your data (1 original + 2 backups)
-
2 different storage types (e.g., local disk + external SSD)
-
1 offsite copy (e.g., cloud or external drive stored elsewhere)
💡 Use versioning or snapshots to roll back encrypted files:
-
NAS devices like Synology/QNAP offer snapshot features.
-
Cloud services like Google Drive or Dropbox allow version history recovery.
Should You Ever Pay the Ransom?
Many modern ransomware groups now threaten data leaks in addition to encryption. But security experts agree:
“Negotiating with attackers is dangerous and unreliable.”
Paying signals that you’re a willing victim — making you a future target. Worse, even after payment, many victims never get their files back or are hit again.
You Can’t Prevent It 100%, But You Can Be Ready
There is no foolproof way to block all ransomware — but resilience is possible through preparation.
Remember the three keys:
-
A layered, pre-configured backup system
-
A clear, practiced response plan
-
A proactive security mindset — keep software updated, check your passwords, and don’t assume “It won’t happen to me”
In the age where data is an asset, protecting it starts with discipline, not expensive tools. The first step? Check your PC updates and NAS passwords right now.
댓글
댓글 쓰기