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

Static analysis result for SHA-256 8d15fadf25887c2c…

MALICIOUS

Office (OOXML) / .XLSM

73.3 KB Created: 2020-01-28 19:47:00 UTC Authoring application: Microsoft Excel 16.0300
MD5: c558218fab28a77dc596dad19e0851fd SHA-1: f9fb21d7ca217bd86b833b416629681c9bd8934b SHA-256: 8d15fadf25887c2c974e521914bb7cba762a8f03b1c97a2bc8198e9fb94d45a5
110 Risk Score

Malware Insights

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

This XLSM document contains VBA macros that employ a lure to convince the user to enable content. Upon enabling, the macros construct and execute a PowerShell command. This command downloads a file from 'http://www.qbqformul.co.za/works/RJC.pif' and executes it, indicating a downloader functionality. The document body itself is a benign-looking tour, but the embedded VBA code is malicious.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • External hyperlinks (3) low OOXML_EXTERNAL_HYPERLINKS
    Document contains 3 external hyperlinks — clickable URLs are stored as external relationships. First target: http://go.microsoft.com/fwlink/?LinkId=846286
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://www.w3.org/2000/svg
    • http://www.w3.org/1999/xlink
    • http://go.microsoft.com/fwlink/?LinkId=846286
    • http://go.microsoft.com/fwlink/?LinkId=844969

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
8e9bb7c4cb2c255c4e59373f6d1062d4acff5de6e957255c8d40736170442f24		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2820 bytes
vbaProject_00.bin
864549b37f5d158b2807ddfa3e3545f22c5fb061f60366cef76a7b42549cd0b0		 vba-project OOXML VBA project: xl/vbaProject.bin 19968 bytes

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