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

Static analysis result for SHA-256 ba0bd92667586990…

MALICIOUS

Office (OOXML) / .DOC

116.6 KB Created: 2020-10-26 20:13:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: ad7e8ce2b696dfcbd67f24b4ea0cd722 SHA-1: 0458e7082fd46575a4e11bfb19b52a8b6e427574 SHA-256: ba0bd92667586990beef3d0b88105404eba6de54b7c5eba5417e6b825adb94d8
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The file is a malicious OOXML document containing a VBA macro, specifically an AutoOpen macro, which is a common technique for initial execution. The macro likely uses CreateObject to download and execute a second-stage payload, as indicated by the ClamAV detection signature 'Doc.Downloader'. No specific URLs or further script details were extracted, but the presence of the AutoOpen macro and the downloader heuristic strongly suggests this attack pattern. The SHA256 hash is included as a primary IOC.

Heuristics 6

  • ClamAV: Doc.Downloader.87e88716f38ff820-OOXML-9981520-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.87e88716f38ff820-OOXML-9981520-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/drawing/2016/ink
    • http://schemas.microsoft.com/office/drawing/2017/model3d
    • 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/2012/wordml
    • http://schemas.microsoft.com/office/word/2018/wordml/cex
    • http://schemas.microsoft.com/office/word/2016/wordml/cid
    • http://schemas.microsoft.com/office/word/2018/wordml
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • 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
ba3192fe30934ce81e759ff614fda0b381790c4b56f2215ff16a4e18e4affcb6		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 14651 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
d07fefdf958c657eac5de3f8b1d7887dd9221ec48fa4a123b0f53dea12ec2b33		 vba-project OOXML VBA project: word/vbaProject.bin 50688 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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