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: 213b4441622f118b.exe
213b4441622f118b5b6f5ca29a09f2fa746bdbfd3741082ddb739448c59a65ff
23/03/2026
→VirusTotal↓Download Sample
Filename: 4afd6ca5d407f3b5.exe
4afd6ca5d407f3b5bd3709b9dcabf3782406f97917b256acd58cabdcb6d24bd5
23/03/2026
→VirusTotal↓Download Sample
Filename: 2ffd17aa46fe5d7a.exe
2ffd17aa46fe5d7ab8c1d6d46a4f6c9baf0600e22c5991e474b43c9552f83a5e
23/03/2026
→VirusTotal↓Download Sample
Filename: d69d47703331c3a4.exe
d69d47703331c3a407d94dcc2404834f3d1d1692f900aa45cced4eb0baa1daac
23/03/2026
→VirusTotal↓Download Sample
Filename: 8de505a3e8fb9f45.exe
8de505a3e8fb9f45b0d003a47fed80878d928a0c5e6cf34122d6a285ade07e76
23/03/2026
→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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