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

Static analysis result for SHA-256 6c858ec1faa58a16…

MALICIOUS

Office (OLE) / .DOC

5.22 MB Created: 2020-07-28 06:12:00 Authoring application: Microsoft Office Word
MD5: 07f7e97635adccf1135b253452cc47fb SHA-1: a55b31faccfea567585474d84e7ff5ff60ebb5f1 SHA-256: 6c858ec1faa58a16514828c5c04ec88e3b90cc679a1fe8becbaae358a27ead38
170 Risk Score

Malware Insights

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

The sample is a malicious OLE document containing VBA macros, specifically a Document_Open macro designed to execute code. The macro uses shell execution and calls the Environ() function, indicating it's likely attempting to download and run a second-stage payload. While the VBA code is heavily obfuscated, the presence of a Document_Open macro and shell execution strongly suggests a malicious intent to compromise the user's system.

Heuristics 6

  • ClamAV: Doc.Malware.Snake-10031454-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Snake-10031454-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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 https://aws.amazon.com/about-aws/global-infrastructure/
    • http://tax.tr.com/onvio
    • http://tax.tr.com/onvio/firm-management
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • 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://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
e409405ec288a8bfc9bab8a29b5e379cda85b82368ba1927859c50fd0eda06c0		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 83130 bytes

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