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

Static analysis result for SHA-256 756df7de57da7b07…

MALICIOUS

Office (OOXML) / .DOC

272.0 KB Created: 2020-10-06 01:12:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 50d8328415a2c6963b1673514e0b3b0b SHA-1: 70ba41fd99fe0cdcbe26a0a04f52bc3a131fbfcf SHA-256: 756df7de57da7b07dae180bdfa2ffd765796b41e020f7e8c063163f61fe47663
220 Risk Score

Malware Insights

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

The file is an OOXML document containing VBA macros, specifically a Document_Open macro, which is a common technique for initial execution. ClamAV detection as 'Doc.Downloader.Sagent-9770108-0' strongly suggests its malicious nature. The presence of a Document_Open macro and the ClamAV detection indicate that the macro likely downloads and executes a secondary payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Sagent-9770108-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Sagent-9770108-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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/2016/wordml/cid
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c8931c0af107afa1009aeb6a5fc60a7646236d3fde8c5c2c125b3219b640be90		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 3152 bytes
vbaProject_00.bin
b25f59604695bbecac6c3f1523b2db0074a2e54da3ae4ae09a48ed85d93b3b85		 vba-project OOXML VBA project: word/vbaProject.bin 13312 bytes
Detection
ClamAV: Doc.Downloader.Sagent-9770108-0
Obfuscation or payload: unlikely
emf_00.emf
f04d0462a7068a26568072d1747f5bd8439f44943424a2464f708b43e6c1ec6e		 ooxml-emf OOXML EMF part: word/media/image1.emf 1933420 bytes

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