AgentTesla is a sophisticated and persistent malware that has been a significant cybersecurity threat since its emergence in 2014.
It is a Remote Access Trojan (RAT) and information stealer written in the .NET framework, designed to exfiltrate sensitive data from infected systems.
Its widespread use is attributed to its availability as Malware-as-a-Service (MaaS), making it accessible to cybercriminals worldwide.
AgentTesla operates as a multi-functional malware with the following key capabilities:
AgentTesla uses multiple communication protocols for exfiltrating stolen data:
AgentTesla primarily spreads through phishing campaigns. Malicious email attachments, often disguised as business documents or shipment notifications, are commonly used.
These attachments exploit vulnerabilities in Microsoft Office, such as CVE-2017-11882, to deliver the malware. Once installed, it evades detection using obfuscation techniques and sandbox detection mechanisms.
AgentTesla has been involved in numerous campaigns targeting industries like energy, logistics, finance, and government.
Its ability to steal credentials and facilitate further exploitation makes it a severe threat. For example, during a three-month period in late 2023, over 5,300 systems were compromised globally.
To defend against AgentTesla:
AgentTesla remains a prominent threat due to its adaptability and effectiveness in stealing sensitive information from targeted systems.
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