Concrete signature match: Backdoor - Provides unauthorized remote access for Linux platform, family Mirai
This detection identifies a variant of the Mirai botnet malware, which targets Linux-based Internet of Things (IoT) devices. The malware spreads by exploiting weak or default credentials, creating a backdoor to enlist the device into a botnet for use in large-scale Distributed Denial of Service (DDoS) attacks.
No specific strings found for this threat
rule Backdoor_Linux_Mirai_BD_2147819262_0
{
meta:
author = "threatcheck.sh"
detection_name = "Backdoor:Linux/Mirai.BD!xp"
threat_id = "2147819262"
type = "Backdoor"
platform = "Linux: Linux platform"
family = "Mirai"
severity = "Critical"
info = "xp: an internal category used to refer to some threats"
signature_type = "SIGNATURE_TYPE_ELFHSTR_EXT"
threshold = "6"
strings_accuracy = "High"
strings:
$x_2_1 = "dreambox" ascii //weight: 2
$x_2_2 = "xmhdipc" ascii //weight: 2
$x_1_3 = "Is$uper@dmin" ascii //weight: 1
$x_1_4 = "meinsm" ascii //weight: 1
condition:
(filesize < 20MB) and
(all of ($x*))
}1827c35fbd718f99feb2302ac64315b5a990ead3b43ca1adb9cc2981d91772b8d68d64c882bd54e0355eb7f2ecf342790c4d49b80b84b1b110c107929ab4bce0Immediately quarantine and delete the detected file. If the file originated from an IoT or embedded Linux device, isolate it from the network, perform a factory reset, and change its default password. Harden all network devices by using strong, unique passwords and keeping firmware updated.