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

Static analysis result for SHA-256 ff4d91bb43b830ff…

MALICIOUS

Office (OOXML) / .DOC

423.2 KB Created: 2020-05-22 04:50:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 20a47cb2fd3a32ebe23ce40f85d23888 SHA-1: ad9f5b1051fe72d839cc917a504b9b2ee3099a41 SHA-256: ff4d91bb43b830ff4b7509695365fd231c74feb7f143cecb9555935031becc1d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell

The OOXML document contains VBA macros, specifically a Document_Open macro that triggers a Shell() call. This indicates the document is designed to execute arbitrary commands upon opening. The presence of 'macros.bas' and 'vbaProject_00.bin' further confirms the macro-based execution. The primary intent appears to be downloading and executing a second-stage payload, though the specific payload and its destination are not detailed in the provided evidence.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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/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
7c5b0a218dd7121a19f4257179160cb5caccc439a3d2e48ac9fc14bfcb0b4b80		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2924 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
69c99880211291bd413241a8730ad62910b4e3ebe12dc0eda04b919c40198dcd		 vba-project OOXML VBA project: word/vbaProject.bin 12800 bytes
emf_00.emf
379c52316f43e3e66ee630da507ae0a211af094c829f58a881328d926a730280		 ooxml-emf OOXML EMF part: word/media/image1.emf 4861684 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.