Machine learning behavioral analysis detected malicious patterns
Backdoor:Linux/DemonBot.Aa is a Linux-based backdoor that compromises systems and incorporates them into a botnet. Once infected, the device is used to scan for other vulnerable targets and participate in DDoS attacks under the control of a remote attacker.
No specific strings found for this threat
rule Backdoor_Linux_DemonBot_Aa_2147763585_0
{
meta:
author = "threatcheck.sh"
detection_name = "Backdoor:Linux/DemonBot.Aa!MTB"
threat_id = "2147763585"
type = "Backdoor"
platform = "Linux: Linux platform"
family = "DemonBot"
severity = "Critical"
info = "MTB: Microsoft Threat Behavior"
signature_type = "SIGNATURE_TYPE_ELFHSTR_EXT"
threshold = "5"
strings_accuracy = "High"
strings:
$x_1_1 = "Multihop attempted" ascii //weight: 1
$x_1_2 = "billybobbot.com/crawler" ascii //weight: 1
$x_2_3 = "YakuzaBotnet" ascii //weight: 2
$x_1_4 = "UDPRAW" ascii //weight: 1
$x_2_5 = "Self Rep Fucking NeTiS and Thisity 0n Ur FuCkInG FoReHeAd We BiG L33T Hax" ascii //weight: 2
condition:
(filesize < 20MB) and
(
((1 of ($x_2_*) and 3 of ($x_1_*))) or
((2 of ($x_2_*) and 1 of ($x_1_*))) or
(all of ($x*))
)
}af16b740e063665ee4fd0c4612da67902b27539a8da6337cc2cf2e17dcac4d260d7cfa2818ed389fe540149fe4d686641296712b16ef951ab9d52cf8f505d43bd544ed0763b1e4cbc0af126862983edb78e6447973a0d88aa8059be58d441ffa07cb7f43030b27a60fbb457243a7c5bb45bafd803b616cb4209b8cdac87f964401598651822cd04d6fda4716aa131e56ac965ccd118552ed08c8f977ac81ded4Isolate the affected Linux system from the network. Identify and remove the malicious executable and any associated persistence mechanisms, then analyze system logs to find and patch the initial entry vulnerability.