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

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

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:VBS/XWorm.RVB!MTB
Classification:
Type:Trojan
Platform:VBS
Family:XWorm
Detection Type:Concrete
Known malware family with identified signatures
Variant:RVB
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 is a VBScript-based Trojan from the XWorm family, detected via machine learning behavioral analysis. It leverages legitimate Windows utilities like mshta, rundll32, and PowerShell for execution, establishes persistence through scheduled tasks and BITS jobs, and exhibits capabilities for API hooking, data encoding, remote file transfer, and potentially network manipulation.

Severity:
High
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: Pago-10663.vbs
5368ee78ec544ea4b93c7e7cf85ca44329b2f3931d8f93194be18866052c5731
09/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected system to prevent further compromise. Conduct a full system scan with an updated antimalware solution to remove the VBScript and any dropped components. Investigate for persistence mechanisms (e.g., scheduled tasks, BITS jobs), lateral movement, and potential data exfiltration. Ensure all operating system and security software is fully patched.
=== 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:~$ ▊