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

Static analysis result for SHA-256 fada93ab8496af86…

MALICIOUS

Office (OOXML) / .DOCX

240.6 KB Created: 2020-04-30 11:52:00 UTC Authoring application: Microsoft Office Word 14.0000
MD5: f8697a97409d1f2baeab91316dfc5620 SHA-1: e11ac026a9d67bc5774e6e7c5b618ed3d3e74762 SHA-256: fada93ab8496af86f141ba0670da43f388dc60483c89c795ed98ccef842400ea
200 Risk Score

Malware Insights

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

The file is an OOXML document containing VBA macros, specifically an AutoOpen macro, which is a common technique for executing malicious code automatically. The presence of GetObject calls and obfuscated VBA strings further indicates malicious intent. ClamAV detection as 'Doc.Dropper.Agent-7729707-0' strongly suggests this document is a dropper for other malware. No specific IOCs like URLs or hashes were extracted from the document body or scripts.

Heuristics 6

  • ClamAV: Doc.Dropper.Agent-7729707-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-7729707-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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 project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c490d0f7b3110eb1fe5242555c209e12ebf6dea78e14c2ba2152d6edd0ee2727		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 157134 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 9 Chr/ChrW string-construction calls.
vbaProject_00.bin
b46acf068e5f379234b8716388cd757d3ed267de63b90f5e03b8882ad17cc646		 vba-project OOXML VBA project: word/vbaProject.bin 3776512 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2930 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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