user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Trojan:Linux/Downldr.ZD!xp
Trojan:Linux/Downldr.ZD!xp - Windows Defender threat signature analysis

Trojan:Linux/Downldr.ZD!xp - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:Linux/Downldr.ZD!xp
Classification:
Type:Trojan
Platform:Linux
Family:Downldr
Detection Type:Concrete
Known malware family with identified signatures
Variant:ZD
Specific signature variant within the malware family
Suffix:!xp
Confidence:Very High
False-Positive Risk:Low

Concrete signature match: Trojan - Appears legitimate but performs malicious actions for Linux platform, family Downldr

Summary:

This is a downloader Trojan detected on a Linux system. Despite the platform, its code contains numerous strings and references to Windows-specific tools (e.g., PowerShell, rundll32, mshta), indicating its purpose is to download and execute additional malware on Windows endpoints. The Linux machine may be acting as a distribution host or file share for the Windows-targeted payload.

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)
No specific strings found for this threat
Known malware which is associated with this threat:
652285d260515c08cfe146ebdd2f5a4977ec490a608c57007abcb5b6f4fd4975
08/11/2025
→VirusTotal↓Download Sample
Remediation Steps:
1. Isolate the affected Linux host from the network. 2. Ensure the detected file is quarantined or deleted. 3. Investigate the Linux system for the initial point of compromise (e.g., vulnerable web service). 4. Scan Windows endpoints for signs of compromise, looking for unusual process executions (PowerShell, rundll32, mshta) and new scheduled tasks.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 06/11/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
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