Rewterz Threat Alert – Ursnif Banking Trojan aka Gozi – Active 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 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 the 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

MD5

• 2dd335e6f00845640a0d490f867db1c5
• d4cb178d18ec1ee1eeb33d650c86e861
• f08cc2c53f1c9321676ff186e134b363
• 7e9bfd12c39e68494fada8eabbafad3e

SHA-256

• a7a86feba39d56914b320770c63b2d59a2187d797fd7c46f0962a174dc1551f6
• c120a9b0f22236ec372ce1745b087a08ae494d138b2cb864bef7c660aee7afb9
• fceb8d758785f33f7184166b83d4d5129ee8907b5525be11afe4e614b71c56de
• 3a7b101841bf22ff79f1a5b4f54de3bcc2d54fd172bf552ba3c9f560661ff37e

SHA-1

• 342ff15d4e3ee1b39a54271ba17448f7102ed017
• a001b8c1347d0f9ed16f3e57c37d83f7e8f5f27e
• f8b9f47b4b211b93069b31eebb14861476c7c97d
• 002cf71c1f2bf66d36ee8d9f2852ff43cb9a4dc4

Remediation

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