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

Static analysis result for SHA-256 f022eeae7917647f…

MALICIOUS

Office (OLE) / .DOCX

267.0 KB Created: 2020-10-28 13:40:00 Authoring application: Microsoft Office Word
MD5: 25966672cd9db0ad1e06d316b02a3f84 SHA-1: e498287d18d2d2fb72aa72ffa2dd6928db959ddb SHA-256: f022eeae7917647f2a15cac5a214660117ff370ec1a76525e69e7760cdaced5b
240 Risk Score

Malware Insights

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

The file is a Microsoft Word document containing VBA macros, indicated by multiple heuristic firings including 'OLE_VBA_MACROS' and 'OLE_VBA_PCODE_AUTOEXEC_EXEC'. The 'Document_Open' macro is present and configured to execute automatically upon opening the document. This macro utilizes 'CreateObject', a common technique for launching malicious payloads. The ClamAV detection 'Doc.Downloader.Generic-9785156-0' strongly suggests the macro's purpose is to download and execute a secondary malicious file. The document body content is heavily obfuscated and does not provide clear user-facing text, but the presence of VBA auto-execution and the downloader heuristic are sufficient to infer the attack pattern.

Heuristics 7

  • ClamAV: Doc.Downloader.Generic-9785156-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9785156-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
04f0b14197f396c9b03f7b934599b1b01d62a486cd3090375b867094895917c9		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18531 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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