Rewterz Threat Alert – ProLock Ransomware – IoCs

Severity

Medium

Analysis Summary

The Prolock ransomware targets victims with phishing emails, improperly configured Remote Desktop Protocol (RDP) servers, and remote access connections over RDP with stolen user credentials. In some cases, Qakbot was found as one of ProLock’s means of initial access. The earliest detection of ProLock by Sophos was on a customer’s compromised server, most likely through an exploit of a Remote Desktop Protocol connection. The ProLock actors use their access to conduct some network reconnaissance, as well as to potentially steal data before launching their ransomware attack. They then use the stolen or compromised credentials, built-in Windows tools and scripts to propagate the ransomware across the network.

Impact

• Unauthorized access
• Information theft
• Files encryption

Indicators of Compromise

MD5

• 8217cf04813e077f04c65f9f259e3eba
• e3d06bd8724d850884e79801aa2bdb42
• 3355ace345e98406bdb331ccad568386
• 81ade22081f8b94567f1717b14b22918
• c579341f86f7e962719c7113943bb6e4

SHA-256

• 18661f8c245d26be1ec4df48a9e186569a77237f424f322f00ef94652b9d5f35
• b262b1b82e5db337d367ea1d4119cadb928963896f1aff940be763a00d45f305
• dfbd62a3d1b239601e17a5533e5cef53036647901f3fb72be76d92063e279178
• 2f0e4b178311a260601e054b0b405999715084227e49ff18a19e1a59f7b2f309
• a6ded68af5a6e5cc8c1adee029347ec72da3b10a439d98f79f4b15801abd7af0

SHA1

• a037439ad7e79dbf4a20664cf10126c93429e350
• 0ce3614560e7c1ddbc3b8f56f3e45278de47d3bb
• 81d5888bb8d43d88315c040be1f51db6bb5cf64c
• 4f125d890a8f98c9c7069b0bb2b5625c7754fad6
• e2a961c9a78d4c8bf118a0387dc15c564efc8fe9

URL

• http[:]//185[.]212[.]128[.]8/B/
• http[:]//185[.]212[.]128[.]8/q109[.]exe
• http[:]//185[.]212[.]128[.]8/j080[.]exe
• http[:]//185[.]212[.]128[.]8/j078[.]exe

Remediation

• Block the threat indicators at their respective controls.
• Keep all systems and software updated to latest patched versions.
• Maintain a strong password policy.