Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 aa1a125fa63d7a97…

MALICIOUS

Office (OLE) / .DOC

243.5 KB Created: 2020-01-15 12:19:00 Authoring application: Microsoft Office Word
MD5: 37a7bfa00bf25d52aa5c00296d884278 SHA-1: d3fc22d1de969107079df61a7f4df0987921ec33 SHA-256: aa1a125fa63d7a979bd7c73935845261e27f42c82ded9867bce8910f0d744aff
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with the signature 'Doc.Dropper.Chartres-7540220-0'. Static analysis detected VBA macros, specifically a Document_Open macro that utilizes GetObject, indicating an attempt to automatically execute code when the document is opened. This pattern is consistent with a macro-based dropper designed to download and execute a secondary payload.

Heuristics 6

  • ClamAV: Doc.Dropper.Chartres-7540220-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Chartres-7540220-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
11a97248086438ede658251b2a0ce4567bdc4397e9f84eb2ba013f2758b8bbf3		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 11180 bytes

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