問98
頻出度★★★
攻撃者が他人の PC にランサムウェアを感染させる狙いはどれか。
令和元年度 秋期 ITパスポート試験 問98
テクノロジ系セキュリティ › 情報セキュリティ
This question's explanation and your answers so far.
解説
問 98
Incorrectア
Stealing the personal information on a PC over the network is the aim of spyware or information-stealing malware. This differs from the essence of ransomware, which is “holding files hostage to demand money”.
- イ
正解 Ransomware (ransom means “ransom money”) is malware whose aim is to make the files on an infected PC unusable — for example by encrypting them — and to demand money (a ransom) in exchange for “unlocking” them. Choice “イ” says “make the files on the PC unusable and demand money in exchange for unlocking them”, which matches this very definition, so it is the correct answer.
Incorrectウ
Recording the character strings typed on the keyboard and sending them over the network is the behavior of a keylogger. Its purpose is to steal passwords and the like, which is a different thing from ransomware, whose aim is to demand a ransom.
Incorrectエ
Sending operation commands from the outside to illegitimately control a PC remotely is a characteristic of a bot (remote-control malware / RAT). Its purpose is to turn the PC into a stepping stone and the like, which differs from the aim of ransomware, which involves demanding money.
ここがポイント
- Ransomware is malware that makes files unusable — for example by encrypting them — and demands money (a ransom) in exchange for decrypting (unlocking) them.
- Distinguish that, even among malicious programs, spyware (information theft), keyloggers (input logging), and bots (remote control) each have different aims.
用語