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. Agent Tesla is renowned for stealing data from a variety of target workstation 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 can 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 effective tools in preventing successful phishing attempts and other types of social engineering attacks.
In a recent campaign, Steganography was employed to conceal the AgentTesla Malware within an EML file that subsequently utilized JavaScript to execute PowerShell, ultimately leading to the execution of RegAsm.exe
Impact
- Sensitive Data Theft
- Credential Theft
Indicators of Compromise
MD5
8f07580bc25a796a5f0b9100d349d0c2
813b425453f7dfea626aa389f639aa4d
52dd2886c2a5698e58955cec8f2b4d37
79cb40033e328f61fe68bd76dd67a7b3
7314ec0fcc64f0c516e503599587604d
eedbda81d4f3d69ee2798e40a8a5572b
SHA-256
e16ed69e1d337d88539ff98cda8d36aabc495db375d68e4f9b86a1843ad8c679
1cc991649d6186d487d5ff01fe3d0dee7c9383d5c3b43d814ea353e5d82c7372
fec34fa3a463f732c5197a4d1bb3649ed5f5a84e3d0bdc664849d0033c4954ba
255ddfdf1409d89110925cfa93ba323d1a68b6c0916764169eeea521867816a6
8a81c3cc487383e9f4373e5a89a0ea1a8f376dab654d5f476590a3991a832be1
42c52ed2af4708289cb182a0fd83026691eabc7c4916a3ef0cf8a01b5f890856
SHA1
c7c39ff2db999f09d1aaca3bc0f29039d97de49b
d4b70a0235288476c18be713e7763b35bbe726af
689c92f0f9178798b21f924e7adad213e6149a8f
a68854ec2481fc2f874e2180dabb155e65c6fbd4
515ef69cd9d0b15c6eb057893d9446c320dadaca
68226fb98f6e93db77d607dcc305716e8a80871d
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 on time 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 on time. Using multi-layered protection is necessary to secure vulnerable assets.