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

Static analysis result for SHA-256 867ca007e5151465…

MALICIOUS

Office (OLE) / .DOC

176.4 KB Created: 2020-09-18 22:05:00 Authoring application: Microsoft Office Word
MD5: 4413348c4329e211e545b25ede11b602 SHA-1: 1d0a769744cbe86efcdcfc74f14294f8c8a50b05 SHA-256: 867ca007e5151465f4155e7a316a21244780a54a499d4df97fb3abf101691ced
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The file is a Microsoft Word document with a high-confidence detection for VBA macros, specifically triggering on the Document_Open auto-execution macro and a CreateObject call. The VBA script appears to be obfuscated but contains string concatenation that, when reconstructed, forms a URL. This suggests the macro's purpose is to download and execute a second-stage payload from the specified URL, aligning with the behavior of a downloader malware.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9763712-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763712-0
  • 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
f035cd1023dade0b5d5e126cbab797fd9aeb292e781548b39fa794a9356990ee		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19197 bytes

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