Rewterz Threat Alert – Ursnif Banking Trojan – Active 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 its 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 customers 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 into 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

• Information Theft
• Financial Loss
• Exposure of Sensitive Information

Indicators of Compromise

Filename

• I627251_10413614[.]xls
• sample20220201-01[.]xls

MD5

• 44bbbdac3334b73c0f8773202d36cc60

SHA-256

• ef92e23f3ab74a0babcbd3bb96cedc7883bda95b3dab7b42c0d363ed4b18f535

SHA-1

• 26fdaa1de7ea45d1f1b6b2ce5f86ee6e030f308f

Remediation

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