Rewterz Threat Alert – DarkyLock Ransomware – Active IOCs

Severity

High

Analysis Summary

Darkylock is a ransomware that encrypts the files of the infected system and appends “.darky” extension to all the encrypted files leaving a ransom note in a text file named as “Restore my files.txt”. The ransomware attacks all commonly used file formats, including media, documents, databases, and archive files. This ransom note consists of information that the only way to decrypt the files is to pay the attackers an amount of 0.005 BTC then they will be provided the decryption tool named as “decrypt_bit.exe”. This ransomware family is linked to Babuk Ransomware. It enters to your system through email spam, Trojan injection, and peer to peer networks.

Impact

• File encryption
• Data theft

Indicators of Compromise

MD5

• 60ed30bea0f9e2db5cc1f45241c7473c

SHA-256

• fc28d2eaee1fd3416fe3e0cd4669df3ac178c577e3a8c386b1c34c3146afb8d6

SHA-1

• 62b33edc9682bc780bc68d34ae7b19eaf429e42d

Remediation

• Block all threat indicators at your respective controls.
• Search for Indicators of compromise (IOCs) in your environment utilizing your respective security controls
• Emails from unknown senders should always be treated with caution.
• Never trust or open ” links and attachments received from unknown sources/senders.
• Limit access to administrative accounts and portals to only relevant personnel and make sure they are not publicly accessible.
• Patch and upgrade any platforms and software timely and make it into a standard security policy. Prioritize patching known exploited vulnerabilities and zero-days.
• Along with network and system hardening, code hardening should be implemented within the organization so that their websites and software are secure. Use testing tools to detect any vulnerabilities in the deployed codes.
• Enable two-factor authentication.
• Enable antivirus and anti-malware software and update signature definitions in a timely manner. Using multi-layered protection is necessary to secure vulnerable assets
• Restrict installation of untrusted 3rd Party application
• Maintain daily backups of all computer networks and servers.