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 to Sensitive Information
Indicators of Compromise
IP
- 62.173.142.51
- 94.103.183.153
- 193.233.175.111
- 109.248.11.145
- 31.41.44.106
- 191.96.251.201
- 62.173.142.53
- 185.232.171.201
- 94.103.183.154
- 95.142.39.92
MD5
- a4071382a33bb9fa55ff8bf8b111bc39
- 7936264575923f443302a9bb14688ab7
- bbcc8ce7492115e5970d0b47f9432f07
- 0fd668d8e285a3227bf9383c0e193369
SHA-256
- 04234564fe449d51f7e685455fcfafb3b7721a0b7d1551e3a370f579a3530e04
- 7efe8c83ab4ba8773421d7f897a1c490214118f7924d5a45868b070cae6899dd
- 715cd8f5ce329b92ed0361a50ce7cc90e7b34746380542c040b85d09d3a4fcff
- b7298af9dc02c079aefe56b1f84b3dc28045d3ae841715cd6f0f87568c1c51c6
SHA-1
- 4eb7f936efe97a88aad9d38452829cd63a3624b2
- ea7a8b4d250529b84bfdfb80785603cee4d07bf9
- 9514f33b0e0ce4814c422c754f5181a9337b6d4b
- 4f5b293e0f582995f4b82470eb30f2172dfcf6f4
Remediation
- Block all threat indicators at your respective controls.
- Search for Indicators of compromise (IOCs) in your environment utilizing your respective security controls
- Never trust or open links and attachments received from unknown sources/senders.
- Maintain cyber hygiene by updating your anti-virus software and implementing a patch management lifecycle.
- Keep operating systems and software up to date: Ursnif malware often exploits vulnerabilities in software and operating systems. Keeping these up to date can help prevent vulnerabilities from being exploited.
- Implement strong password policies: Ursnif malware often relies on stolen login credentials to access sensitive information. Implementing strong password policies and multifactor authentication can make it more difficult for attackers to gain access.
- Provide regular security awareness training for employees that can help them recognize phishing emails and other types of social engineering attacks that are commonly used to spread Ursnif malware.