Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 b1d0cf3a145ae925…

MALICIOUS

Office (OOXML)

222.1 KB Created: 2020-12-03 09:47:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2020-12-25
MD5: d0b4d2417c52eb1cbac2890587902d0a SHA-1: 75b2216606f4d2b2cf003b01f427ba61985c94a9 SHA-256: b1d0cf3a145ae925792f97204805e3934d89581bcd4ed0c5c733c4f84800f6e0
84 Risk Score

Malware Insights

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

The sample is a malicious OOXML document containing an embedded OLE object. This object is identified as a risky file package that drops an auto-executable payload, specifically a JAR file. The presence of this embedded object strongly suggests an attempt to execute a secondary payload upon opening the document.

Heuristics 4

  • 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
  • Suspicious extracted artifact info 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 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/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 211968 bytes
SHA-256: 930b75f1a1f8026e666347d8c2b4b6d65a521d14c52611684b53b70792bab06f
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 207715 bytes
SHA-256: ea4df2b5070fde78638e8d0da3e0aae5c7b72b7552514e0845e1a252eecc81a6
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.
ooxml_oleobject_00_ole10native_00_38354748578836884399572655563469447564946486479663393828268654872821367113749294.jar ole-package-payload OOXML word/embeddings/oleObject1.bin Ole10Native payload: display_name=38354748578836884399572655563469447564946486479663393828268654872821367113749294.jar; full_path=C:\Users\TESTER\AppData\Local\Temp\38354748578836884399572655563469447564946486479663393828268654872821367113749294.jar; temp_path=; def_file= 206749 bytes
SHA-256: f2e9f5917625bfe0471f59f2dcb4b63d7917c4c4ccc7b1f21a7b03de7c593906
emf_00.emf ooxml-emf OOXML EMF part: word/media/image2.emf 5148 bytes
SHA-256: d72b721c401f964668000d59672d4aad5208545b5f221497a932d5763dc3e349

Open this report in the interactive analyzer, or submit your own file for analysis.