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

Static analysis result for SHA-256 321b5dbbc36ac494…

MALICIOUS

Office (OLE) / .DOC

118.5 KB Created: 2021-01-06 14:56:00 Authoring application: Microsoft Office Word
MD5: f95643710018c437754b8a11cc943348 SHA-1: f590e1b6a80cf3e8360388382eabb04b3e247b78 SHA-256: 321b5dbbc36ac4946955905f9dd4f44b15df30cbfd7d2be1d8b6171c1ee71b67
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1218.011 System Binary Proxy Execution: Rundll32 T1105 Ingress Tool Transfer

The sample contains VBA macros, specifically a Document_Open auto-execution macro, which is a common technique for initial execution. The heuristics indicate the use of LOLBins and a reference to certutil, suggesting the macro is likely used to download and execute a second-stage payload. The document body appears to be a resume, likely a lure to entice the user to open the malicious document.

Heuristics 7

  • LOLBin reference in VBA critical OLE_VBA_LOLBIN
    LOLBin reference in VBA
  • Reference to certutil (download/decode) high SC_STR_CERTUTIL
    Reference to certutil (download/decode)
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
a1d0d2066d4b2534350761add2cd5f419dc72599a58de6f669b394ed95f9eaef		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2131 bytes

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