Rewterz Threat Alert – Ursnif Banking Trojan – Active IOC’s

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 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 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

• Information theft
• Financial loss
• Exposure of sensitive information

Indicators of Compromise

MD5

c33644c4f82a0c81ebc17e8c47ff2151
17e7057780b22e9ccb2a54633593a457
5522c21a05daf91658951bdf1c0e5271
f3be390b01c85970deeae124ca36ce2d

SHA-256

5831ebc72dc810c036fa0c1dc85e17490ebfe2f7379b9573f99d47817b9eb42c
fda3439c3d23b729daea5b9d6c775b37318f1ab4052f3c07d068efba250a860d
eb6e2519aa5c31174a1ed6c0193b2d0e49e9ed6ca1ac01ed94b3007b5e2f6993
4eef8b6a5bcd808cd0ab0e33efcea2c2f9a36abe556e56556de8550383c9d3ce

SHA-1

• 592380317ff6d62338eeedf0f87b2937316c8e33
• 7c80ad5f5a232a0969319e5c307300af8a19a7cf
• fed4a9b4069cd2676928441ecf8c844cc7f4a9ee
• 93114ecf1b2c711ec10e1fafdc834393efc11a97

Remediation

• Block all threat indicators at your respective controls.
• Search for IOCs in your environment.
• Do not download files attached in untrusted emails.