MALICIOUS — I-Worm.Nimda.zip

MALICIOUS — I-Worm.Nimda.zip is a zip sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (89/100), attributed to the UNOFFICIAL family. 2 of 48 detection engines flagged it.

Identification

• SHA-256: 70e37ea05b1d89e37e04b1c2ce98731e65b6c37cf718dc72a109d862ca36cc2a
• SHA-1: 9386f9265791878c36a39be267b1e332ecc75ece
• MD5: 844855b2ec58f20718cff30d874ab43e
• ssdeep: 3072:mUIpQH9KIUYxqpNuxoL4FhPH9hdGdElGmUKVjre6u:K6H9z+46LKRdhdVlFHu
• TLSH: T18D3C02DE8F8A5B59CB670D9008D9940C85BE8D5ED1B4490B6FA475FAB2FD0CF09242C2
• Submitted as: I-Worm.Nimda.zip
• File type: zip · Size: 112623 bytes
• Verdict: malicious (89/100) · Family: UNOFFICIAL

Source: theZoo · first seen 2026-07-25T18:26:26.224Z · SHA-256 not source-verified

Detections (2 of 48 engines)

• MalwareAnalyser heuristics (entropy/packer): high-entropy-blob
• ClamAV (daily): {HEX}bin.trojan.generic.n.93.UNOFFICIAL

Why this verdict

The malicious score of 89/100 is the fusion of 3 weighted signals:

• ClamAV (daily) flagged {HEX}bin.trojan.generic.n.93.UNOFFICIAL (rule {HEX}bin.trojan.generic.n.93.UNOFFICIAL) - engine signal, weight 0.90, confidence 0.95
• Packing/obfuscation: high-entropy-blob - static signal, weight 0.25, confidence 0.55
• Archive contains executables: main_menu.js, I-WORM~1.VBS - static signal, weight 0.25, confidence 0.50

Archive contents (3 executables)

This zip carries 3 extracted members, each analyzed as its own sample:

• I-WORM~1.VBS - bb9f9fcea94271478da1e6fda01d089979a152eee642fa711e2a81990518d3b7
• main_menu.js - ec44bf9b374a9477850a6f65ff1b0f1b92574664653e31717aafa46eb0bc9ede
• readme.eml - c4a60096ad81f6e4ce7412f4873465de408eab69d7ac35b9af9b0b1a4ccd3eea

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report