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. It is important to implement a multi-layered security approach, including keeping software up to date, using strong and unique passwords, and avoiding clicking on suspicious links or downloading unknown files, to defend against Agent Tesla and other forms of malware. Additionally, organizations should consider implementing endpoint protection solutions to detect and prevent malware infections.

Impact

• Sensitive Data Theft
• Credentials Theft

Indicators of Compromise

MD5

• 98cc790b3d7afad1a24ae58cb8d801a6
• a1d6fd5700ea9b5446968ece7376c741
• 2ac28c54dc45653738cd9c89a43a82f9
• 6bca96125423b79fe048dcbc58624e5f
• 7a24508ed89f7bb56684b3b208c69d92
• 4ea51d2a32944cd50b5eb030f09ab6fd

SHA-256

• 526418af31a5d19ca68606c09913d4a88b0478f2b35bd6779c566ecaf84ab6d2
• f246a2928ff4385319ee284a0da694797eb0329423b2ac35a5bc468d56d43263
• 0f43506114d66c47dd526e3688d0759830031936a73b4814443fec2f7ce4e4ed
• 3f726e7e27cab2febb3921fc3b4cd58312a7a394cb63fc5f59283654e27c88cf
• 4d265e6df24188d863cd6dee6439b264c2006dd9a203a6e47d72fdb398081015
• 53245d962b781d4ecd80a1b763d94c006fbb4c3863629e515c290320a6d30374

SHA-1

• 6cb0a3270eaf2d36d46925ea9766878801f9cb41
• 636a6f3ba98e90f66415764980674c4b8929ded5
• ef5e11aae3f08502dc59583c651edb397f334c6a
• df9420a48516ed1b678705b13788b684e9eb7faf
• 94c9c80206707d22897c4bfe537c456f3c641fd2
• 196e778cd7cebaa28b03de1f6e6874accd618961

Remediation

• Block all threat indicators at your respective controls.
• Search for Indicators of compromise (IOCs) in your environment utilizing your respective security controls
• Emails from unknown senders should always be treated with caution.
• Never trust or open ” links and attachments received from unknown sources/senders.