Malicious Office (OLE) / .DOCX — malware analysis report

Static analysis result for SHA-256 8f45e17c388a3d5b…

MALICIOUS

Office (OLE) / .DOCX

586.5 KB Created: 2022-02-07 08:38:00 Authoring application: Microsoft Office Word
MD5: 404f204b4dc6d26e67f3c63115a026ca SHA-1: 6353a11e0552f70dba88f5f1e4ca85e32e573bf3 SHA-256: 8f45e17c388a3d5b9864be3b75c129b89363c2fbf44212a101d985b2a9a78d0a
62 Risk Score

Malware Insights

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

The sample contains a VBA macro that executes upon opening the document. This macro, specifically the Document_Open subroutine, constructs a URL by concatenating strings to form 'http://kukumar1s.ru/t'. It then checks for a directory and, if not found, proceeds to open a password-protected document. The macro's intent is to download and execute a second-stage payload, likely disguised as a password-protected document, by constructing a malicious URL.

Heuristics 3

  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliography
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
6b5c1ee22f7e3179b00a2f7fc16299b597afa3cf93f9808506dec474f2d0e7aa		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1244 bytes

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