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 the 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
- 11f434055b7b8a80fc30ac784ab13213
- 05d8bfa49f5e244edeaece0482bee02e
SHA-256
- 271db256638e97c8c74a2428f23fe0ac61d3a9b9f3736abffffb72969fc3d863
- 30f61595c13011fcb19c621c8d3d5f05687df317a01c5e7446bb5f453a9f5fd5
- 33f7d6b43b7553094c69926837bf0c684452a4e9b459dfb18b14595b66e6f640
- 4d7b2acf124f25be010c20698a973c345cf66cd1ea752398b8db23446751bd0c
SHA1
- 240bb66e9797aee71578612fb4ffa90884ec7c6c
- 884256946cf2d547bedb03d2dda72e9f8b55cde5
Remediation
- Block all threat indicators at their respective controls.
- Look for IOCs in your environment.