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

Static analysis result for SHA-256 4a623ed11ca5628b…

MALICIOUS

Office (OOXML) / .DOC

2.80 MB Created: 2021-04-09 19:36:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 12569c0f42b8dd4d8d6777dcd0d098db SHA-1: de03988c899ed67e4eb5375ae30349898af3fd28 SHA-256: 4a623ed11ca5628bac56eab735d098671db69fd003afebe09ce18853043790dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The OOXML document contains VBA macros, specifically a Document_Open macro. This macro utilizes Shell() and CreateObject() functions, indicating an attempt to execute arbitrary commands and likely download and execute a second-stage payload. The presence of these functions strongly suggests a malicious intent, although the specific family cannot be determined from 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
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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.micr
    • 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.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/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
f5f42cbdbda06d2566f1b9ec006e94617db815a61882962db204b64bcc45efae		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 8388608 bytes
vbaProject_00.bin
dd9bcc6fc95cd1c7ea1adc91998af01d8c13944650bd980468cac4a90c08952b		 vba-project OOXML VBA project: word/vbaProject.bin 3317760 bytes

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