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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
Domain Name
- bookline[.]top
- booklinks[.]top
- linkspremium[.]ru
- premiumlists[.]ru
MD5
- 049bccde1ace69a1e4e38a3dd3dd798a
- fe44a36082379b8b3309043fa8cde0d5
- 0179f7b0bd61f06d3705812e50583b20
SHA-256
- 7ea20fdb8ecf698093ff02757db174479d2a569a14dc7d82966a6b50dad160f3
- c6e233eb7c8bfa7db6fbd0753f2460e40cdc11f478274126e4b42e3dcab65722
- d61ee5e7b17684983ea9049f719beb05978a813638f53f7625e970bae1c2abd7
SHA-1
- 557c56b81b496a75cb68640f664aa9218d476ea4
- 9a6d1e213c3c62eb8abfd2aaa03c082eddb8d310
- c640e2e26b783093c8b1d418af11f468c828458f
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.