Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 6690c9ca65638c31…

MALICIOUS

Office (OOXML)

272.7 KB Created: 2021-08-05 10:48:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2026-06-05
MD5: 6ff689272146cf3c3127752de64a3f72 SHA-1: f396bb56721d151321fd7d45f23c9edf226a028c SHA-256: 6690c9ca65638c3149173f13a3ea553bb196574cd6fec31a22e4fc67ab5d315e
82 Risk Score

Malware Insights

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

The OOXML document contains an embedded OLE object which is flagged as a critical risk for dropping an auto-executable payload. The payload is identified as 'GP crypt.exe'. This indicates a likely attempt to deliver malware via a malicious attachment, commonly associated with spearphishing campaigns.

Heuristics 3

  • Ole10Native package drops an auto-executable payload critical OFFICE_PACKAGE_RISKY_FILE
    OLE Package displayName or fullPath ends in a directly auto-executable extension (a runnable binary or a script the default shell host runs on double-click). Embedding such a payload inside an Office document has no benign authoring use — it is a malware-delivery dropper.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • 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.microsoft.com/office/word/2010/wordprocessingCanvas In 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/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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 563712 bytes
SHA-256: abd1240d3b0c8a9f9e89903b36694f0e8c44ab8123c85a2c0e88f1bf1dba1064
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 556946 bytes
SHA-256: c47d1736ba07c32c617afe4fa4f05d629546ddda5f85191f917b8323642a683e
ooxml_oleobject_00_ole10native_00_GP_crypt.exe ole-package-payload OOXML word/embeddings/oleObject1.bin Ole10Native payload: display_name=GP crypt.exe; full_path=C:\Users\LINGTE~1\AppData\Local\Temp\GP crypt.exe; temp_path=; def_file= 556544 bytes
SHA-256: 1f953fc098d7a173c7d8f3c70280ea149d79f5a915611561f60fec0fdac4ba51
emf_00.emf ooxml-emf OOXML EMF part: word/media/image1.emf 5496 bytes
SHA-256: f7ce656404d2c2be37bfbc7dcd26202aaaab1a526ddcbbeaca1da80109ad3549

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