Win.Trojan.GoodNight-2 — Office (OLE) malware analysis

Static analysis result for SHA-256 3801bb54e4ff0c9c…

MALICIOUS

Office (OLE)

34.5 KB Created: 1997-11-25 10:09:00 Authoring application: Microsoft Word for Windows 95 First seen: 2012-06-14
MD5: 72b7cf735f6a30347e475ecffd56d13c SHA-1: e51806e5806bdaeb424245cc83c853ed65bd6546 SHA-256: 3801bb54e4ff0c9cc83300dc9da6404e2efa69fade6a52b3aed502e32ef325c9
220 Risk Score

Malware Insights

Win.Trojan.GoodNight-2 · confidence 90%

MITRE ATT&CK
T1059.005 Visual Basic

The file is identified as a legacy Word document containing a WordBasic macro with an AutoClose event, a known indicator of malicious activity. Heuristics indicate the presence of a macro lure, instructing the user to enable content, and a suspicious OLE structure suggesting deliberate obfuscation. The ClamAV detection name 'Win.Trojan.GoodNight-2' strongly suggests the malware family and its likely function as a trojan.

Heuristics 6

  • ClamAV: Win.Trojan.GoodNight-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.GoodNight-2
  • Embedded Office document has suspicious static findings critical EMBEDDED_OFFICE_CHILD_STATIC_TRIAGE
    A CFB/OLE Office document was found inside another file type and its carved contents matched Office exploit or payload heuristics. This catches wrapped exploit documents where the top-level file routes to a PE, archive, or generic scanner instead of Office.
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 35,328 bytes but its declared streams total only 17,705 bytes — 17,623 bytes (50%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • CFB header with no readable streams medium OLE_PARSE_EMPTY_STREAMS
    The file begins with a valid OLE2/CFB header but exposes no directory streams. A non-empty compound document with an unreadable directory is anomalous — it is seen with truncated/corrupt files and, more importantly, with content deliberately shifted off byte boundaries to defeat parsers while the host application still recovers the object.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_office_off00001417.ole embedded-office Embedded OLE/CFB Office body inside ole container at offset 0x1417 30185 bytes
SHA-256: 10f3bb57b37898bb867e08e15331eb45a3b4635f8dccd0b967dbde41fe65d029

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