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LambdaLocker Ransomware

Posted: January 16, 2017

Threat Metric

Ranking: 9,349
Threat Level: 8/10
Infected PCs: 808
First Seen: January 17, 2017
Last Seen: October 15, 2023
OS(es) Affected: Windows

The LambdaLocker Ransomware is a file-encrypting Trojan that can lock your files so that it may sell its threat actor's decryption assistance to you. This form of extortion is preventable by keeping backups that the LambdaLocker Ransomware can't wipe, although free decryption solutions also may be viable. Malware experts recommend anti-malware protection for blocking or removing the LambdaLocker Ransomware to limit its access to your files.

'L' is the New Letter for Greed

January sees new Trojan campaigns with multi-ethnic targeting options, letting con artists increase the geographical scope of their base of victims. The latest evidence of this practice at work in live environments is the LambdaLocker Ransomware. The LambdaLocker Ransomware brands itself after the Greek alphabet but victimizes Chinese and English speakers. The plan of the LambdaLocker Ransomware's threat actor is simply to lock any files with an encryption cipher and then get ransom money from providing the victim with the (supposedly) only decryptor available.

The LambdaLocker Ransomware scans the local drive for content including text documents, spreadsheets, images, movies and music. When it finds a suitable file, it employs an AES encryption routine to 'lock' the content. The second layer of the RSA encryption protects the cipher from third-party solutions cracking it. Malware experts can verify that the LambdaLocker Ransomware uses a unique tag for its locked content, the '.lambda_l0cked' extension, which no other threat to date uses.

Having blocked your data, the LambdaLocker Ransomware creates HTML messages either in the encrypted directories or on your desktop. As usual, the Chinese and English instructions tell the victim how to pay a Bitcoin fee to reacquire their files. Although the LambdaLocker Ransomware does deliver a time limit, the one-month restriction is much more generous than most Trojans of the same type, which often prefer restrictions numbering in a matter of days or even hours.

Striking Lambda out of Your Computer's Vocabulary

The LambdaLocker Ransomware offers no shocking swerves in design as a ransom-based Trojan, but it does show off the capacity for con artists to expand their campaigns beyond national borders with as little effort as possible. Infection vectors for this threat that malware experts suggest watching out for include:

  • Con artists may crack password-protected servers directly, particularly for Remote Desktop enabled systems.
  • However, more often, high-value targets compromise themselves by opening e-mail attachments. These Trojan droppers may disguise themselves to look like invoices, internal memos or package delivery notifications.
  • For personal computer users, compromises are most likely to come from exposure to threatening websites hosting Exploit Kits or unsafe downloads that bundle the LambdaLocker Ransomware with themselves.

Keeping regularly updated backups will let you cripple the possible file damage that the LambdaLocker Ransomware's payload causes. Anti-malware programs also can detect most threats of this category and remove the LambdaLocker Ransomware automatically, when applicable.

No matter where you live, the LambdaLocker Ransomware and Trojans identical to it are problems best prevented with foresight and common sense security protocols.

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