Win.Dropper.Powershell-6368805-0 — Office (OOXML) malware analysis

Static analysis result for SHA-256 fdd627e66cb8555d…

MALICIOUS

Office (OOXML)

144.6 KB Created: 2017-10-30 19:42:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2017-11-13
MD5: 00abc554689b0d2c5beac595206ed9b1 SHA-1: 79fd0afe5c6134ac15e1bc8b3e2fb8c806745c8c SHA-256: fdd627e66cb8555d68ce025cf216f5d64ad6d45112f869d9986fb2257d5a4dd6
224 Risk Score

Malware Insights

Win.Dropper.Powershell-6368805-0 · confidence 95%

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell T1566.001 Spearphishing Attachment

This OOXML document contains an embedded OLE object with indicators of a malicious payload, specifically a .lnk file. Heuristics suggest exploitation of CVE-2026-21514, and ClamAV detections identify it as Win.Dropper.Powershell-6368805-0. The embedded OLE object likely facilitates the download and execution of a second-stage payload from the URL http://giancarlovaccari.com/693, potentially using PowerShell.

Heuristics 6

  • ClamAV: Win.Dropper.Powershell-6368805-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Dropper.Powershell-6368805-0
  • Ole10Native package carries executable/script file type high OFFICE_PACKAGE_RISKY_FILE
    OLE Package displayName or fullPath ends in an executable or script-capable extension. Even without UI extension spoofing, embedding a runnable payload inside an Office document is a high-risk delivery pattern.
  • 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.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • Payload URL recovered from embedded OLE object (1 URL) info OOXML_EMBEDDED_OBJECT_URL
    An embedded OLE object (xl/word/ppt embeddings) carries a next-stage download URL in its Ole10Native/Package stream — stored literally (incl. UTF-16) or base64-encoded — which the package-level URL sweep does not see. Surfaced as an IOC; self-validating (only real payload hosts).
  • 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://giancarlovaccari.com/693 In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2014/chartexIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 4608 bytes
SHA-256: 424680c18d5c8a03f8c54e482ce1cd9ca27f6df48b6964ae3aba470d9b32d7b4
Detection
ClamAV: Win.Dropper.Powershell-6368805-0
Obfuscation or payload: likely
Static shellcode analysis recovered command string(s): powershell.exe, PowerShell\v1.0\powershell.exe
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 2373 bytes
SHA-256: f75c633d65e3c0e5b507a9ff61d12117dbcdc343b13234b045c1da2d25dcc407
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered command string(s): powershell.exe, PowerShell\v1.0\powershell.exe
emf_00.emf ooxml-emf OOXML EMF part: word/media/image1.emf 5424 bytes
SHA-256: 06799a4709039eee51f0b897678a522ff7e4f15fdffba713717da1b854d9cb24

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