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Severity
Medium
Analysis Summary
The malware loader, Bumblebee, is used to download Cobalt Strike and perhaps other malware such as ransomware. It also replaces the BazarLoader backdoor, which is previously used to transmit ransomware payloads. This new malware is linked to a number of threat actors, including several well-known ransomware.
According to researchers, the appearance of Bumblebee in phishing attempts in March correlates with a drop in the use of BazarLoader for distributing file-encrypting malware.
Bumblebee is distributed in the form of ISO files that contain malicious DLL and shortcut files. It employs different techniques to avoid detection. It can determine virtualization environment processes to prevent operating on virtual machines. Banking information, password, and identity theft are the main impact of this malware.
Bumblebee malware is designed to download and run additional payloads in order to infect computers with other malware. Bumblebee can be used to inject information stealers, cryptocurrency miners, and other malware since it is designed to drop extra payloads. The C2 (Command and Control) server is where Bumblebee gets commands. It is used by the attackers to download and execute files directly, inject malicious DLLs, and create operating system persistence.This new malware is linked to a number of threat actors, including several well-known ransomware.
Impact
- Credential Theft
- Financial Loss
- Exposure of Sensitive Data
Indicators of Compromise
IP
- 51[.]68[.]146[.]200
- 154[.]56[.]0[.]221
- 3[.]85[.]198[.]66
- 3[.]144[.]143[.]242
MD5
- 9e7d45b4f097d4274aa74b5eaade65d9
- 14dfd95691377152208492f44daf97ae
SHA-256
- 2e349b3224cc0d958e6945623098c2d28cc8977e0d45480c0188febbf7b8aa78
- 4c6a865771fdb400456b1e8bc9198134ac9d2f66f1654af42b4b8fc67ae018f2
SHA-1
- e7b0de2872002621f1aab89fe3c54d579fbe46a0
- f73fc1102f8006b1cc1b74e91da51992a1b3ce9f
Remediation
- Block the threat indicators at their respective controls.
- Search for IOCs in your environment.