Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 0de486e758ab3a42…

MALICIOUS

Office (OLE)

154.9 KB Created: 2020-09-14 22:09:00 Authoring application: Microsoft Office Word
MD5: 3fab1fd7cf8af2e60a1c03e4512a106a SHA-1: 0a8a8e6fa8718167ff972aa3f1f91bab154f3295 SHA-256: 0de486e758ab3a42b8cf8fac0544cd138cac337db3c2688bf2e714089db683ad
202 Risk Score

Malware Insights

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

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that utilizes CreateObject. This indicates an attempt to execute code upon opening. The obfuscated VBA code, combined with the heuristic firings for VBA p-code auto-execution and generic malware detection, strongly suggests the document is a malicious loader. The presence of a URL, although benign, is noted. The VBA macro's obfuscated nature and its likely purpose of executing further stages prevent a higher confidence score.

Heuristics 6

  • ClamAV: Doc.Malware.Generic-9760527-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Generic-9760527-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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
bf2dc6e4793502154f28a14458af4f5198ccc48932a5641a4c34f7f1fcdc0c82		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18582 bytes

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