Rewterz Threat Alert – STRRAT Malware – Active IOCs

Severity

High

Analysis Summary

Experts at the German cybersecurity firm identified the Java-based StrRAT malware in June 2020. This malware uses plugins to grant the attacker remote access. This malware steals login credentials from browsers and email clients, logs keystrokes, and exploits vulnerable Windows operating systems remotely. The malware adds the file extension (.crimson) to Notepad to show a bogus ransom message. STRRAT malware supports the browsers Firefox, Chrome, Foxmail, Outlook, Internet Explorer, and Thunderbird.
STRRAT permits threat actors to remotely control compromised machines/computers. According to research, this RAT can be used to run commands that let users upload files, download files, delete files, open files, restart computers, and carry out a variety of other tasks.
Furthermore, users who have the STRRAT installed on their computers run the risk of experiencing issues with online privacy, surfing security, financial loss, identity theft, account lockout, system infection with further infections, etc.

Impact

• Unauthorized access
• Information theft
• Exposure of sensitive data

Indicators of Compromise

MD5

• fb8ea8a407cc8a1a846d454a30bba3cd
• 4bb307f45c90b67e623e6e5a586c892c
• c642cd645cce5ae2ca8edf526a6197e2

SHA-256

• a5b9228892566983d00f37c99daf610d31a538e949c4f5d9eeda8ff57c1cf162
• a445376b6f138af236eb753fb1d78bfa9c190605986b7def8e7823153ee94b82
• 34bd0e474627ce365ab235e1f7d0f3253360a044a1dcc0918caa8d271698bb33

SHA-1

• 8b2b82b7dae11460b4f304aa9696903c92282e98
• 7f3f86bec06a00215974f768209bac4e89953257
• d32536e936b9588838e8d3e06194033ec7b1773c

Remediation

• Block all threat indicators at your respective controls.
• Search for IOCs in your environment.
• Passwords – Ensure that general security policies are employed including: implementing strong passwords, correct configurations, and proper administration security policies.
• Admin Access – 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.
• Enable antivirus and anti-malware software and update signature definitions in a timely manner. Using multi-layered protection is necessary to secure vulnerable assets