Rewterz Threat Alert – AgentTesla Information Stealer – Fresh IoCs

Severity

Medium

Analysis Summary

A new AgentTesla campaign is seen targeting victims with malspam. AgentTesla is known for stealing data from different applications on victim machines, such as browsers, FTP clients, and file downloaders. Agent Tesla collects personal information from the victim’s machine, steals data from the victim’s clipboard, can log keystrokes, capture screenshots and access the victim’s webcam. It can kill running analysis processes and AVsoftware. The spyware also performs basic actions to check whether it is running on a virtual machine or in debug mode, in an attempt to hide its capabilities and actions from researchers. All the data it obtains is sent in encrypted form via SMTP protocol.  
This current Agent Tesla campaign seems to be using email attachments with the common phishing themes of invoice, quotation request, new order, shipping advice, etc. These malicious attachments when downloaded and executed will infect the target system with Agent Tesla. 

Impact

• Credential Theft
• Data Exfiltration
• Information Disclosure
• Detection Evasion

Indicators of Compromise

Filename

• specs datasheet[.]exe
• REQUEST23341234[.]exe

MD5

• f8674c0b7be761d12ace57039b6688fd
• f3511f0df79889c36525c17db27c51b4
• 48c9149831946bc0dcec0a6a66d159b1
• 5cf5ee802d8c13debe04c707489da0b8
• 3ddf9b5d91a3d979e6477e789ece05b7
• 666cb0fddb4cf8633c56a4ccaf69500b
• 666cb0fddb4cf8633c56a4ccaf69500b

SHA-256

• 4901e545f909725ea2329a68aab1875a244404f379a3a66bbc289fc032dab053
• 9827198753b9ab546a2789690c63af319a81b61e203486abaee027b304b186ad
• cba307ef1a3a55b09513b978a8e592ff2229a30de65b799e081fb1dbea836256
• 50c08700245c10a4f452c302e09777a88e8d88fac7fa5395756c2b9559f76357
• a944ba68cf53d0b13e6ce99e2e90db74cba352c36593aeeef21d001ad98f3d6b
• 8b26cdcf75986872f5d68ea2e7d46eec7b7e085ce0473b1ec8a4292beaaa276f
• 108885ad12de3e0c6d7e712eb48bc8c4571b1be01ca4a37f9857f61d7a6d591a

SHA1

• d9b8d52c23d59ffe04e6df665c47fa639c682725
• 116e9800385efcf9b13169b7922fdd606f0e3df8
• fb56eb1fa9ac5fd4b54065604fd17845e8ce74a6
• 5b14d0c4467ee7022661c35966a2620dfc76152a
• f31b1b56f7b981c4698bb74731eec7f9a1273fde
• fdcf33284d5da54a4f7cf918f2ae7b1b2898ced6
• fdcf33284d5da54a4f7cf918f2ae7b1b2898ced6

Remediation

• Block the threat indicators at their respective controls. 
• Do not download files attached in untrusted emails.