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

Static analysis result for SHA-256 d6cbf0ba3a28273b…

MALICIOUS

Office (OOXML) / .DOC

247.6 KB Created: 2021-02-07 17:10:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 5aed7104227c47141955ff76f87246f4 SHA-1: d41393bf221bfc79f37b06182e707947dd9290d8 SHA-256: d6cbf0ba3a28273b22f18fb6e669b8297fbdd4f9b8fd2c60b71b1742f226ab7f
200 Risk Score

Malware Insights

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

The sample is an OOXML document containing a VBA project with an AutoOpen macro, indicating an attempt to automatically execute code upon opening. The presence of a CreateObject call suggests the macro likely attempts to download and execute a second-stage payload. ClamAV detection as 'Doc.Downloader.BlueWord12213-9918951-0' further supports this downloader functionality.

Heuristics 6

  • ClamAV: Doc.Downloader.BlueWord12213-9918951-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.BlueWord12213-9918951-0
  • 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.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/2012/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
b1cec46e9a52c765ba03e2f8e4750462871c4dc690e02d00b4051e6043063923		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2359 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
ec1f29b9d5e80c279d85c41cbdebeebff26d965f23ab5a651d1fde1ac123bd57		 vba-project OOXML VBA project: word/vbaProject.bin 97280 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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