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

Static analysis result for SHA-256 efdf5d9470d62b3e…

MALICIOUS

Office (OLE) / .DOC

198.0 KB Created: 2016-11-09 03:09:00 Authoring application: Microsoft Office Word First seen: 2023-10-05
MD5: 8ce2f866187d1993dbf4e0c850d112d0 SHA-1: 957e57aed77af5cd95e232bec8c4d55d31cd83b0 SHA-256: efdf5d9470d62b3e2bad4f44494bec8633861b9a69b2b4ea83664ecde7ea33f2
162 Risk Score

Malware Insights

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

The file is a malicious Office document containing VBA macros, specifically a Document_Open macro. This macro is designed to copy itself to other VBA projects within the same document, a common technique for obfuscation or propagation. The presence of a 'Password-protected archive handoff' heuristic suggests the document's content is a lure to encourage macro execution, likely to download and execute a secondary payload. The embedded URL is suspicious and likely part of the malicious chain.

Heuristics 5

  • ClamAV: Doc.Downloader.Macop-6922875-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Macop-6922875-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://oa.petrochina/OfficeWebService/OfficeWebService.asmx
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
66393ee29ba79780493d26d0ec4e3daae3931f931e996defe70cf03f31bb3fb7		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 13955 bytes

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