Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 d97ab3e87327bea7…

MALICIOUS

Office (OOXML)

16.9 KB Created: 2021-07-19 10:29:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: aeb79d10c4093b2956420b5f3e15ac86 SHA-1: fb37cd478012cbe004280f44e7a140c013129d45 SHA-256: d97ab3e87327bea70b24e56989de4f5e0805cbaddaf53960b6df78622019f502
222 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is an Office document containing VBA macros. The Document_Open macro executes a PowerShell command, which is obfuscated but appears to download and execute a second-stage payload. The presence of the Document_Open macro and the execution of PowerShell indicate a malicious intent to compromise the user's system.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — 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.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
32728e0eb992841eda70d0aa57bec09f2cfc0b9de33da17f7ecef7f866756a0c		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2126 bytes
vbaProject_00.bin
7721cde2e4f69cfff93235c3d750d64c21666fe6e0336a559634f421662a4f9e		 vba-project OOXML VBA project: word/vbaProject.bin 12288 bytes

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