Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e71f37ea321cd16a…

MALICIOUS

Office (OLE)

60.0 KB Created: 2016-05-08 21:25:00 Authoring application: Microsoft Office Word First seen: 2018-01-23
MD5: d8b8ecad1a47ce57183db4241b4f0737 SHA-1: b72f7145caf27d8cd84a883a2b9c2442bbba9cb6 SHA-256: e71f37ea321cd16a141f3f62fc0119dd51cebce52f9962c5edea2411d1c9f90b
110 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing a VBA macro. The 'Document_Open' macro is present and configured to execute code, indicating an attempt to run a payload automatically when the document is opened. The macro's content is minimal, suggesting it acts as a loader for further malicious activity, likely downloading a second-stage payload. No specific family could be identified.

Heuristics 5

  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • 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.
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Attribute VB_Customizable = True
Private Sub Document_Open()
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  • 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.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 340 bytes
SHA-256: c72e738d9adfb82c186fdd6f8d37f1684fc9642071ae42f591606686f5640ebc
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
Private Sub Document_Open()
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End Sub

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