Rewterz Threat Alert – BrushaLoader Ransomware Still Sweeping Victims

Severity

High

Analysis Summary

BrushaLoader is one of a growing group of downloaders frequently employed by threat actors to profile infected PCs and then load more robust payloads on devices of interest. Malware like BrushaLoader contributes to the ongoing trend of “quality over quantity” infections and enables threat actors to better stay under the radar than they can with highly disruptive infections like ransomware or when distributing massive malicious spam campaigns with high-profile malware as their primary payload. At the same time, these loaders can also deliver those same disruptive infections if threat actors choose to load ransomware as secondary payloads.

Impact

File encryption

Indicators of Compromise

URLs

• fees[.]tetofevent[.]online
• http://analiticap[.]info/
• https://drive[.]google[.]com:443/uc?id=14ok5q46YDL8wL1HLmQyuWi0n-xRgtHxq&export=download
• analiticap[.]info

Malware Hash (MD5/SHA1/SH256)

• 04869bef3007a33e8bf9b14bd650e2b872daa6d2bb2b5ea35d4cb271f35d49e2
• a1a6886f86ac1080d2fc3d645a8a1223209bfb1e91918d90a99b06d559ccb010
• a3f00f3b77faed13f24c8d572fe59ac38a2467449a60a1b9dc1c64baeb145b0a
• bf70c2a22bfb0cc952b29689394e623b632f1c3371f2a6864fd26514639393aa
• d994f65735bb53dda95f7ab097e59bbd2043f8091d246bc4e21ba55ba6bda764
• eb12ece1bb8ebaf888282db3c6c852f3e21397d60b45a694c424690b2d6fe838

Remediation

• Block all threat indicators at your respective controls.
• Always be suspicious about emails sent by unknown senders.
• Never click on the link/ attachment sent by unknown senders.