Rewterz Threat Alert – Agent Tesla Malware – Active IOCs

Severity

Medium

Analysis Summary

Agent Tesla is a very popular spyware Trojan built for the.NET framework. Since its initial appearance in 2014, this has been deployed in many forms, most notably via phishing attempts. AgentTesla is renowned for stealing data from a variety of target workstations’ apps, including browsers, FTP clients, and file downloaders. Agent Tesla grabs data from the victim’s clipboard, logs keystrokes, captures screenshots, and gains access to the victim’s webcam. It has the ability to terminate running analytic programs and anti-virus applications. In an attempt to disguise its capabilities and activities from researchers, the malware also runs simple checks to see if it is operating on a virtual machine or in debug mode. This can spread through various means, including phishing emails, malicious software downloads, or drive-by downloads. Once installed, it runs in the background and can bypass traditional security measures, making it a significant threat.

The malware employs various techniques to evade detection and analysis, including code obfuscation, anti-virtual machine and sandbox detection, and encryption of communication channels. It may also employ polymorphic techniques to generate unique variants to avoid detection by traditional antivirus solutions. Agent Tesla has been observed targeting individuals, small businesses, and organizations across multiple sectors, including finance, healthcare, manufacturing, and government. It is a global threat, impacting users and organizations worldwide.

Organizations and individuals can protect themselves against Agent Tesla and other types of malware by implementing strong cybersecurity measures, such as using up-to-date antivirus software, avoiding suspicious emails and attachments, and keeping all software and operating systems up to date with the latest security patches. Additionally, user education and awareness can be an effective tool in preventing successful phishing attempts and other types of social engineering attacks.

Impact

• Sensitive Data Theft
• Credentials Theft

Indicators of Compromise

MD5

• 003ec7cf3274b6fb4df159bb82c9272d
• 711f22759352f71502ae383ab4cea435
• 999034e51b1d44cf1a1f8e2503311822
• bfc21585d9c68ae4992a1f6f75b64e84
• 0862063639dc97750daf15585294be78
• ee946e93f18e575bcf3ff98e56bbe68a

SHA-256

• fc3abaedd390a09669bbda0d333a7a2a1f2e9087bf293f44e25f879b2add32f7
• 7be0e7463275859563c266e5a7f0d02dd105458764ca49523d19c64811e1f0d5
• d91ffe38f69e9fdf3979a0bfdf442b94221108f281afb275591e6ba96d000237
• da316c99baf4e8e8e2df0d6d52a77774edb23a7375393a7b0b9414e8cb7b04a7
• 1f82382ba93d0f863daa178a4972db5fe3405c97a97b5f78676314cd67d2dfa9
• 77e5c0683c26d723d3b77057d3d871de78ac53791b9e0645c6cebe6382445367

SHA-1

• 48b84d3f788d4f2bea7e6372209631e87f0c79d5
• 2c766048391043b624a0d9713fa664ec5f151a0e
• 4d94e6a47f9c0bb8a4542bd9cdbc2b56412b3518
• bb1c65c007eaa34eb7d27606197f27876feec294
• 76c85bb45b04887bff19a071bbf98bc550099dee
• 46311852176490aab500b4a6123d4bf3c3b8c7be

Remediation

• Block all threat indicators at your respective controls.
• Search for Indicators of compromise (IOCs) in your environment utilizing your respective security controls
• Never trust or open links and attachments received from unknown sources/senders.
• Maintain cyber hygiene by updating your anti-virus software and implementing a patch management lifecycle.
• 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.