user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Trojan:VBS/XWorm.RVC!MTB
Trojan:VBS/XWorm.RVC!MTB - Windows Defender threat signature analysis

Trojan:VBS/XWorm.RVC!MTB - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:VBS/XWorm.RVC!MTB
Classification:
Type:Trojan
Platform:VBS
Family:XWorm
Detection Type:Concrete
Known malware family with identified signatures
Variant:RVC
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 VBScript platform, family XWorm

Summary:

This detection indicates a VBS-based variant of XWorm, a potent Remote Access Trojan (RAT), identified through machine learning behavioral analysis. The malware leverages legitimate Windows utilities like mshta, rundll32, regsvr32, PowerShell, and BITS for execution, persistence, and command-and-control operations. Its capabilities include process hooking, data encoding, remote file manipulation, scheduled task creation, and network configuration changes, posing a significant threat to system integrity and data confidentiality.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - !#HSTR:StringCodeForMshta.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.C!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.D!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.L!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.O!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRegsvr32.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRundll32.A!pli (PEHSTR_EXT)
 - rundll32 (PEHSTR_EXT)
 - !#HSTR:StringCodeForBITSJobs.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForPowerShell.G!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForScheduledTask.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForDataEncoding.D!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.J!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.K!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRemoteFileCopy.B!pli (PEHSTR_EXT)
 - !#HSTR:ExecutionGuardrails (PEHSTR_EXT)
 - !#HSTR:StringCodeForFileDeletion.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.M!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForNetshHelperDLL.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRemoteServices.A!pli (PEHSTR_EXT)
Known malware which is associated with this threat:
Filename: Maersk_shipping_document_confirmation_request_0000000_12_10_2025.vbs
07ce35b881876429b23fccdb2a75e09e1da5ccec71e4ba38301843d1039f3a12
11/12/2025
→VirusTotal↓Download Sample
Filename: Maersk_shipping_document_confirmation_request_0000000_12-09-2025.vbs
62fd03bdf9c53269615883519cc93c38013aac356e31913c13c90df7a7f14dd0
09/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected system to prevent further compromise. Perform a full system scan with updated antivirus definitions to remove the malware and associated artifacts. Investigate for persistence mechanisms (e.g., scheduled tasks, registry entries) and network connections. Reset credentials for any accounts used on the compromised host, and consider re-imaging the system if complete eradication cannot be confirmed.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 09/12/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊