Rewterz Threat Alert – Oski Data Stealer Malware – Active IOCs
September 24, 2021Rewterz Threat Alert – GuLoader Malspam Campaign – Active IOCs
September 24, 2021Rewterz Threat Alert – Oski Data Stealer Malware – Active IOCs
September 24, 2021Rewterz Threat Alert – GuLoader Malspam Campaign – Active IOCs
September 24, 2021Severity
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 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
- daa48985080f68f222c688092df85633
- e7ac180e8217a97505fee5b06709d331
SHA-256
- e63a9ff15de73a3b5e076cc16ddeb90dee8e246b5a889d6bd961fa3cfc777de8
- d5fe3f6846ca1f5e09e94d66a816c3fc00634013ca7bf9e35361bd185a27c395
SHA-1
- 94b945766584b71b88898aa44d075871d80303a6
- 85b078b46c648ec00de6e1952e4d165edbbc878e
Remediation
- Block all threat indicators at your respective controls.
- Search for IOCs in your environment.