Concrete signature match: Trojan - Appears legitimate but performs malicious actions for Linux platform, family Mirai
Trojan:Linux/Mirai.A!xg is a concrete detection of a Mirai botnet variant primarily designed to infect Linux-based devices, particularly IoT, to incorporate them into a botnet. Infected systems are used to launch distributed denial-of-service (DDoS) attacks and other malicious activities. The presence of Windows-specific strings like `msinfo.exe` and `schtasks` commands could suggest multi-platform capabilities, a complex infection chain involving Windows hosts, or an attempt to clean up traces in a mixed environment.
Relevant strings associated with this threat: - /ver.txt (PEHSTR_EXT) - /update.txt (PEHSTR_EXT) - http://%s:8888/ (PEHSTR_EXT) - \msinfo.exe (PEHSTR_EXT) - /delete /f /tn msinfo (PEHSTR_EXT) - |#d1e49aac-8f56-4280-b9ba-993a6d77406c (NID) - }#d1e49aac-8f56-4280-b9ba-993a6d77406c (NID) - &|#b2b3f03d-6a65-4f7b-a9c7-1c7ef74a9ba4 (NID) - &}#b2b3f03d-6a65-4f7b-a9c7-1c7ef74a9ba4 (NID) - y*|#56a863a9-875e-4185-98a7-b882c64b5ce5 (NID) - y*}#56a863a9-875e-4185-98a7-b882c64b5ce5 (NID) - C|#be9ba2d9-53ea-4cdc-84e5-9b1eeee46550 (NID) - C}#be9ba2d9-53ea-4cdc-84e5-9b1eeee46550 (NID) - L|#3b576869-a4ec-4529-8536-b80a7769e899 (NID) - L}#3b576869-a4ec-4529-8536-b80a7769e899 (NID) - |#5beb7efe-fd9a-4556-801d-275e5ffc04cc (NID) - }#5beb7efe-fd9a-4556-801d-275e5ffc04cc (NID) - |#01443614-cd74-433a-b99e-2ecdc07bfc25 (NID) - }#01443614-cd74-433a-b99e-2ecdc07bfc25 (NID) - |#d3e037e1-3eb8-44c8-a917-57927947596d (NID) - }#d3e037e1-3eb8-44c8-a917-57927947596d (NID) - |#7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c (NID) - }#7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c (NID) - |#92e97fa1-2edf-4476-bdd6-9dd0b4dddc7b (NID) - }#92e97fa1-2edf-4476-bdd6-9dd0b4dddc7b (NID)
7d97ed27edfab9ca8e2c729a2bf6970890561bb893cbeaace55f00e9cd4b3d2eImmediately isolate the affected system to prevent botnet participation and further compromise. Perform a full system scan with updated antivirus software to ensure complete eradication. Identify and patch all underlying vulnerabilities (e.g., weak credentials, unpatched firmware/software) that allowed the initial infection. Finally, review network logs and monitor for suspicious outbound connections and C2 activity.