Rewterz Threat Alert – BluStealer Infostealer aka a310logger – Active IOCs

Severity

Medium

Analysis Summary

BluStealer is a type of malware known as an Infostealer, which is designed to steal sensitive information from infected computers. BluStealer specifically targets user credentials, such as usernames and passwords, from web browsers and email clients. Once installed on a victim’s computer, BluStealer can silently gather information and send it back to the attackers who control the malware. This stolen information can be used for a variety of nefarious purposes, such as identity theft, financial fraud, and espionage.

This malware targets personal computers and goes after sensitive information such as browser credentials, FTP applications, credit card details, and personal crypto wallets highlighting the serious threat it poses to individual users.

BluStealer is typically spread through phishing emails, malicious downloads, or other forms of social engineering that trick users into downloading and installing the malware. To protect against BluStealer and other types of Info stealers, it is important to practice good cybersecurity hygiene, such as using strong passwords, keeping software up to date, and avoiding suspicious emails or downloads.

Impact

• Keystroke Logger
• Information Stealer

Indicators of Compromise

MD5

• e67a119b25c041892a38c6147fd54c60
• 976a912fe44d3b31ef181277129b3ca3
• 235c2d00b691656b63a715eac1e7511b
• 1e83c4305573d2474cff4b83f5f5566e

SHA-256

• 2bfafdc20b461ef574d77bd7c29d586c6a7c3ad6b3ad9bbecab8c014308b07d9
• dbf75a247c2141d83e39f08a304bfde553e4e1553bb0524721bd4c8b189ebb02
• 374bd46f94cdf56eb2775ec23f0b70e8179541f348de2959a4a885b8f22af99c
• b092e2388c1f790870d97b73440930d4e0c134610c17091e8987622745a0cc48

SHA-1

• 8c3c63629929b9754c62fbad1e731f33758d2d2d
• b5ec4fd353c3c19a9e46dcc22440b7ca8bd8994e
• 511e1e3646ad2ca0012709c56544ca9497b969e0
• 4ae7e03082ec4660fe2787c0b512d21dc5367998

Remediation

• Block all threat indicators at your respective controls.
• Search for Indicator 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.