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

Static analysis result for SHA-256 3bfd7455c46d83d8…

MALICIOUS

Office (OOXML) / .XLSX

122.1 KB Created: 2015-06-05 18:17:20 UTC Authoring application: Microsoft Excel 16.0300
MD5: ac0d5c022685a0ccabf15aba22baf4c2 SHA-1: 03efd0c1aec496d92d41d81aa8d549f0ad336813 SHA-256: 3bfd7455c46d83d8df8bf1e1fbb6c1dc812b35db35a0a05d166c0a2b2a12dc86
60 Risk Score

Malware Insights

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

The sample is an OOXML spreadsheet identified as malicious. It contains VBA macros, indicated by the OOXML_VBA heuristic. The presence of a CreateObject call suggests the macro attempts to instantiate objects to perform malicious actions, likely to download and execute a second-stage payload. No specific IOCs were extracted beyond the presence of the macro itself.

Heuristics 3

  • 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.openxmlformats.org/spreadsheetml/2006/main
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/drawingml/2006/spreadsheetDrawing
    • http://schemas.microsoft.com/office/spreadsheetml/2009/9/main
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac
    • http://schemas.microsoft.com/office/spreadsheetml/2014/revision
    • http://schemas.microsoft.com/office/spreadsheetml/2015/revision2
    • http://schemas.microsoft.com/office/spreadsheetml/2016/revision3

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
f28b4f20fe539fc0249d9744e22f8bcc98f55e7804c8ea0e1324830787473fab		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2072 bytes
vbaProject_00.bin
977af7f3b57d7868416eefb30f7f7836c36af067787812a36a950f12e22270cd		 vba-project OOXML VBA project: xl/vbaProject.bin 18432 bytes

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