Concrete signature match: Trojan - Appears legitimate but performs malicious actions for .NET (Microsoft Intermediate Language) platform, family XMRig
This threat is identified as Trojan:MSIL/XMRig.IJ!MTB, a cryptocurrency miner that covertly utilizes system resources to mine Monero. Detected concretely through machine learning behavioral analysis and specific binary patterns, it poses a low false positive risk and aims to degrade system performance and increase operational costs.
No specific strings found for this threat
rule Trojan_MSIL_XMRig_IJ_2147948422_0
{
meta:
author = "threatcheck.sh"
detection_name = "Trojan:MSIL/XMRig.IJ!MTB"
threat_id = "2147948422"
type = "Trojan"
platform = "MSIL: .NET intermediate language scripts"
family = "XMRig"
severity = "Critical"
info = "MTB: Microsoft Threat Behavior"
signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
threshold = "3"
strings_accuracy = "High"
strings:
$x_3_1 = {6f 0e 00 00 0a 0b 06 6f 13 00 00 0a 07 28 14 00 00 0a 0c 08 6f 15 00 00 0a 7e 02 00 00 04 25 3a 17 00 00 00 26 7e 01 00 00 04 fe 06 06 00 00 06 73 16 00 00 0a 25 80 02 00 00 04 28 01 00 00 2b} //weight: 3, accuracy: High
condition:
(filesize < 20MB) and
(all of ($x*))
}37f8a54ffb5377feb9b65b66e2da08ab3fb237321f2ae544cf597022d475a0dbImmediately isolate the affected system, then perform a full anti-malware scan to remove the XMRig miner and associated files. Verify and remove persistence mechanisms, monitor network activity for mining connections, and ensure all system software is fully patched to prevent re-infection.