Rewterz Threat Alert – Latest Ursnif IOCs

Severity

High

Analysis Summary

Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 when it’s source code was published on Github and since then the moderators have always tweaked some changes to make use of their arsenal according to their gains. Mainly attacking banks and other financial institutions. As banking security has hardened and more customer have used mobile banking apps, attackers have switched to using Trojans such as Ursnif to steal other types of data, including email configurations, as well as credentials and passwords stored in web browsers and even digital wallets. Threat actors use different techniques to make a victim fall to their trap. In many cases, a phishing email is sent to a victim that contains a malicious attachment – typically an Excel spreadsheet. If the victim clicks on an “Enable Content” button, they will not see the spreadsheet; rather an embedded macro code, which contains PowerShell commands and that’s how the infection begins to unfold.

Impact

• Financial loss 
• Exposure of sensitive information

Indicators of Compromise

MD5

• 3a1ebc82a5c0c8eccc290f16d7082c9d

SHA-256

• c4e6f5cfecd2f30e47b684e5e57a6a9c9b03853546959baaf39e5948b7c9e15b

SHA1

• 2d5b79b6fa18163032f1e6e073d8eba48f41fbcf

Remediation

• Block all threat indicators at your respective controls.
• Search for IOCs in your environment.