user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat TrojanDownloader:Win32/Nemucod
TrojanDownloader:Win32/Nemucod - Windows Defender threat signature analysis

TrojanDownloader:Win32/Nemucod - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: TrojanDownloader:Win32/Nemucod
Classification:
Type:TrojanDownloader
Platform:Win32
Family:Nemucod
Detection Type:Concrete
Known malware family with identified signatures
Confidence:Very High
False-Positive Risk:Low

Concrete signature match: Trojan Downloader - Downloads additional malware for 32-bit Windows platform, family Nemucod

Summary:

TrojanDownloader:Win32/Nemucod is a highly malicious downloader that uses scripting (WScript.Shell), system utilities like rundll32.exe, regsvr32.exe, mshta.exe, and PowerShell for execution, persistence, and to retrieve additional payloads. It is capable of downloading files via HTTP using BITS, dropping them to specific locations, and establishing persistence through methods like scheduled tasks or DLL registration, often leading to more severe infections like ransomware.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - ("esj.")) (MACROHSTR_EXT)
 - .CreateObject(vb_ (MACROHSTR_EXT)
 - ("llehS.tpircSW")) (MACROHSTR_EXT)
 - http (MACROHSTR_EXT)
 - /crypt.dll (MACROHSTR_EXT)
 - C:\rncwner\ (MACROHSTR_EXT)
 - .dll DllRegisterServer (MACROHSTR_EXT)
 - rundll32.exe (MACROHSTR_EXT)
 - ShellExecuteA (MACROHSTR_EXT)
 - !#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:StringCodeForFileDeletion.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.M!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForNetshHelperDLL.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRemoteServices.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForSoftwarePacking.C!pli (PEHSTR_EXT)
Known malware which is associated with this threat:
Filename: virussign.com_aef5833f818667027194d217695bbd90
ba04e23dd6e8c8cd97b7932a319f33aa55ab905d5e53750846ca474b71b55f88
22/03/2026
→VirusTotal↓Download Sample
Filename: virussign.com_c136eb87f379f002fa9b245245d6db10
0b35f71757222ab1e86335db014562d98a5eedb456e04266c3ed90d442b04151
22/03/2026
→VirusTotal↓Download Sample
Filename: virussign.com_05f34eb9a87b136d272bfa9b718c6440
53e0c959d2e562075d89751c12491edd1fca766ce9f5ebc72c807e6f9ad1ea2a
22/03/2026
→VirusTotal↓Download Sample
Filename: virussign.com_1f9db0e9196f95a36cc7c6ffb3f32140
6c3d889d004469be888abc69b2abc3e30ae1933f86b5eb0df840d9ce55eca434
22/03/2026
→VirusTotal↓Download Sample
Filename: virussign.com_8371fc1541031f8853a7c72b22665090
2b42508d21c45eca4f626ebfce0f6e7aae40639d3e124512363312399ff614ad
22/03/2026
→VirusTotal↓Download Sample
Remediation Steps:
Isolate the affected system immediately. Perform a full system scan with updated endpoint protection, remove all detected malicious files, and eliminate any established persistence mechanisms (e.g., registry entries, scheduled tasks, startup items). Thoroughly investigate for secondary infections as Nemucod's primary role is to download further malware.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 22/03/2026. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
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