BazarLoader — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 786e2a3ed9063def…

MALICIOUS

Office (OLE) / .DOC

131.0 KB Created: 2021-09-29 01:00:00 Authoring application: Microsoft Office Word
MD5: 37c6018d4e044c626d4ec8c144e6a38a SHA-1: 5911acba97455e57de63e47b18413bf5bf195028 SHA-256: 786e2a3ed9063defd0d09eb262f2f2cd77d1caea41bbec4205d6623da04a182a
182 Risk Score

Malware Insights

BazarLoader · confidence 95%

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

The sample is a malicious Office document containing VBA macros, specifically a Document_Open macro designed to execute a payload. The macro attempts to lure the user into enabling content, a common tactic for malware droppers. The ClamAV detection explicitly identifies it as a BazarLoader variant, a known downloader. The script constructs and executes a command that likely downloads and runs a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Downloader.BazarBlue09211-9898945-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.BazarBlue09211-9898945-0
  • 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
5ba50d77e487f92dce82b7773896d03cb2995aa8bcdb78a63c9ef0991514ce92		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1087 bytes

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