Rewterz Threat Alert – Ursnif Banking Trojan – IOCs

Severity

Medium

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

URL

• http[:]//45[.]63[.]30[.]20/l1o2c3o4m5o6t7i8v[.]php
• http[:]//45[.]76[.]126[.]209/vehicle[.]php
• http[:]//45[.]77[.]50[.]112/gstyrsOisyc[.]exe
• https[:]//yyauto[.]com[.]au/settings/boss[.]php
• https[:]//mazspares[.]com[:]443//iofiles/boss[.]php
• https[:]//yyauto[.]com[.]au[:]443//settings/boss[.]php

Remediation

• Block all threat indicators at your respective controls.
• Always be suspicious about emails sent by unknown senders.
• Never click on the links/attachments sent by unknown senders.
• Search for IOC’s in your environment.