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

Static analysis result for SHA-256 71f31402f23d959b…

MALICIOUS

Office (OLE) / .DOC

159.8 KB Created: 2020-09-22 07:35:00 Authoring application: Microsoft Office Word
MD5: 486780fa62ccefb2c018a9c2ccb9b13d SHA-1: 34bfe569917268e9f48468c768eede40955ed26c SHA-256: 71f31402f23d959b496d57ee5c41f38bce086c449bc5de99d93329e25f768efd
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a malicious Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject and GetObject calls. This indicates an attempt to execute code upon opening. The macro appears to be obfuscated, but the presence of these functions strongly suggests it's designed to download and execute a second-stage payload. The ClamAV detection further confirms its malicious nature.

Heuristics 7

  • ClamAV: Doc.Malware.Ewtz-9765424-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Ewtz-9765424-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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
a112d95a2b3b8361e272604fc368010c1a607c2cd21f88c20a607d79b8ac6136		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 16742 bytes

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