Concrete signature match: Backdoor - Provides unauthorized remote access for Linux platform, family Mirai
This detection identifies a backdoor associated with the Mirai botnet, specifically targeting Linux systems. The malware infects the device, allowing attackers to control it remotely and use it as part of a larger network to conduct Distributed Denial-of-Service (DDoS) attacks.
No specific strings found for this threat
rule Backdoor_Linux_Mirai_HP_2147914065_0
{
meta:
author = "threatcheck.sh"
detection_name = "Backdoor:Linux/Mirai.HP!MTB"
threat_id = "2147914065"
type = "Backdoor"
platform = "Linux: Linux platform"
family = "Mirai"
severity = "Critical"
info = "MTB: Microsoft Threat Behavior"
signature_type = "SIGNATURE_TYPE_ELFHSTR_EXT"
threshold = "2"
strings_accuracy = "High"
strings:
$x_1_1 = {f6 83 84 00 00 00 04 0f 44 c2 89 84 24 a0 00 00 00 31 d2 85 f6 74 04 8d 54 24 0c 31 c0 85 db 74 07 8d 84 24 98 00 00 00 6a 08 52 50 ff b4 24 3c 01 00 00 e8 99 00 00 00 83 c4 10 85 f6 89 c3} //weight: 1, accuracy: High
$x_1_2 = {8b 73 08 75 17 69 06 6d 4e c6 41 05 39 30 00 00 25 ff ff ff 7f 89 06 89 45 00 eb 2b 8b 4b 04 8b 13 8b 7b 18 8b 01 01 02 8b 02 83 c2 04 d1 e8 39 fa 89 45 00 8d 41 04 72 04} //weight: 1, accuracy: High
condition:
(filesize < 20MB) and
(all of ($x*))
}348821fb9bc381b4bcda43574446adf9041ce123183ee169dc943e74937e8352Isolate the compromised Linux device from the network immediately. Use your security software to remove the detected file. Change all default or weak credentials on the device, disable unnecessary services like Telnet, and apply all available security patches to prevent reinfection.