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

Static analysis result for SHA-256 726b5d200edb3df6…

MALICIOUS

Office (OLE) / .DOC

264.0 KB Created: 2019-02-01 20:55:00 Authoring application: Microsoft Office Word
MD5: 74d3067eabe56b46be314b23804c12e2 SHA-1: c5ac88d8a38171a7fa5408d279323ce98725e7d8 SHA-256: 726b5d200edb3df66c8b53d5f408497761efcc25a521e71e788945067bb50bc9
222 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1204.002 Malicious File

The sample is a malicious Office document containing VBA macros. The Document_Open macro is configured to execute a shell command, which is a common technique for downloading and executing further malicious content. The specific shell command constructed by the script is not fully discernible due to obfuscation, but the intent to execute arbitrary code is clear.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Malware.Outbreak-6923440-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Outbreak-6923440-0
  • 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
  • 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://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
9a3325f8f2aa2cfc3a8caeebf81252473dd257b79077e9c401dab9d0c913a908		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1586 bytes

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