Rewterz Threat Alert – STRRAT Malware – Active IOCs

Severity

High

Analysis Summary

STRRat is a Java-based Remote-Access Trojan (RAT) with a slew of malicious features, notably information theft and backdoor capabilities. This RAT was first identified at the German cybersecurity firm in June 2020. This malware uses plugins to grant the attacker remote access. STTRat 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.

It 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

• f96b654e92b94a04e1af586001a0f331
• 2bf5c4af340f39c7e8ff2c5fca5b20ef
• 2d900620e07331a60339d11b25b9292e

SHA-256

• 7a48f47ccec705e04798fa06edb6803677a46e5dfb017371be18c9608e0935ee
• afac21d1b9673cfeae619b8aa6d7ffbcabe8a3872ccd1755c048365fd8c8dd2f
• a83f0415df70e06c63f57541df0e9b8ff8a8519d5a2ede0abe20e0373adff06f

SHA-1

• f6450a5fa075fe4eb4638b7b8acd382345e858b9
• de630146dda5c68e4226f1059d2f4a0f4f57d261
• c24b6d36bd77f55b802454c5bf72d20f821e5666

Remediation

• Block all threat indicators at your respective controls.
• Search for Indicators of compromise (IOCs) in your environment utilizing your respective security controls
• Maintain cyber hygiene by updating your anti-virus software and implementing a patch management lifecycle.
• Maintain Offline Backups – In a ransomware attack, the adversary will often delete or encrypt backups if they have access to them. That’s why it’s important to keep offline (preferably off-site), encrypted backups of data and test them regularly.
• Emails from unknown senders should always be treated with caution.
• Never trust or open ” links and attachments received from unknown sources/senders.
• 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 antivirus and anti-malware software and update signature definitions in a timely manner. Using multi-layered protection is necessary to secure vulnerable assets