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

Static analysis result for SHA-256 965b90d435c1676f…

MALICIOUS

Office (OLE) / .DOCX

487.5 KB Created: 2019-12-10 10:19:00 Authoring application: Microsoft Office Word
MD5: 80812d4b01071a137f5bf845beb80e8b SHA-1: 3ee10a5a36c3dd3e1d1b7b356f7c022768c276ff SHA-256: 965b90d435c1676fa78cdce1eee2ec70e3194c0e4f0d993bc36bfd9f77697969
330 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample is a malicious Office document containing VBA macros. The Document_Open macro is configured to auto-execute and uses a Shell() call, indicating it's designed to download and execute a second-stage payload. The document body explicitly prompts the user to "Enable Editing" or "Enable Content", a common social engineering tactic to bypass macro security. ClamAV detection confirms it as a dropper.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Dropper.CrimsonRAT-7591453-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.CrimsonRAT-7591453-0
  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • 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/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://schemas.openxmlformats.org/drawingml/2006/main
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliography
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
87df17ce780170ddec5e88559de3ac2598490a63d64f17c949434ee1121bbd77		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4256 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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