user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Trojan:Win64/Lightrail.EC!MTB
Trojan:Win64/Lightrail.EC!MTB - Windows Defender threat signature analysis

Trojan:Win64/Lightrail.EC!MTB - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:Win64/Lightrail.EC!MTB
Classification:
Type:Trojan
Platform:Win64
Family:Lightrail
Detection Type:Concrete
Known malware family with identified signatures
Variant:EC
Specific signature variant within the malware family
Suffix:!MTB
Detected via machine learning and behavioral analysis
Detection Method:Behavioral
Confidence:Very High
False-Positive Risk:Low

Concrete signature match: Trojan - Appears legitimate but performs malicious actions for 64-bit Windows platform, family Lightrail

Summary:

Trojan:Win64/Lightrail.EC!MTB is a 64-bit Windows trojan identified through machine learning behavioral analysis. The threat specifically references 'VGAuth.dll', a component of VMware Tools, strongly suggesting it is designed to target virtualized environments for purposes like credential theft, data exfiltration, or lateral movement.

Severity:
High
VDM Static Detection:
Relevant strings associated with this threat:
 - VGAuth.dll (PEHSTR_EXT)
YARA Rule:
rule Trojan_Win64_Lightrail_EC_2147918703_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:Win64/Lightrail.EC!MTB"
        threat_id = "2147918703"
        type = "Trojan"
        platform = "Win64: Windows 64-bit platform"
        family = "Lightrail"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "7"
        strings_accuracy = "High"
    strings:
        $x_5_1 = {48 03 ce 48 ff c6 42 88 44 f1 3e 48 63 c2 49 3b c0 7c e0 8b 5d 9b 41 03 d8 eb 4c 45 8b cb 48 85 d2 7e 42 4c 8b 6d ef 4d 8b c3 4d 8b d5 41 83 e5 3f 49 c1 fa 06 4e 8d 1c ed 00 00 00 00 4d 03 dd 41 8a 04 38 41 ff c1}  //weight: 5, accuracy: High
        $x_5_2 = {b9 00 00 01 00 48 89 44 24 30 41 b9 01 00 00 00 48 89 44 24 28 41 b8 00 10 00 00 48 89 44 24 20}  //weight: 5, accuracy: High
        $x_2_3 = "VGAuth.dll" ascii //weight: 2
    condition:
        (filesize < 20MB) and
        (
            ((1 of ($x_5_*) and 1 of ($x_2_*))) or
            ((2 of ($x_5_*))) or
            (all of ($x*))
        )
}
Known malware which is associated with this threat:
Filename: dll64.dll
b19bdfda0cd8e50f7b5968d39aa31449a9cf9b85b8d7e00e19400cf5734f70bf
18/11/2025
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected endpoint from the network to prevent further spread. Use Windows Defender or another reputable EDR/antivirus solution to perform a full system scan and remove the detected files. Investigate the host and other virtual machines for signs of compromise and reset credentials for all accounts used on the system.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 18/11/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊