Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 483525bbf61bd718…

MALICIOUS

Office (OOXML)

401.2 KB Created: 2014-09-30 13:22:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2014-10-13
MD5: b7089782da04a0a3ceb1a30b766168d1 SHA-1: 41f3432a817c0391289f9d7f071ea181bac9b2c8 SHA-256: 483525bbf61bd718319ac1d0e42879dd4ec717832cee87c58f5d4fc25ef1a136
204 Risk Score

Malware Insights

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

The sample is an OOXML document containing an embedded OLE object that is flagged as a risky file type. This object is identified as a '.scr' file, which is an executable script. The document body prompts the user to click the embedded object, suggesting a social engineering lure to execute the dropped payload. ClamAV detections further confirm the malicious nature of the extracted artifact.

Heuristics 5

  • ClamAV: Win.Trojan.Ag-4254306-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Ag-4254306-1
  • 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.openxmlformats.org/markup-compatibility/2006 In 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.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/2006/wordmlIn document text (OOXML body / shared strings)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 443904 bytes
SHA-256: 1eac5a2bdca7c928f44a4f16527817c40d0fed48847ae72e3a88d14af96c3037
Detection
ClamAV: Win.Trojan.Ag-4254306-1
Obfuscation or payload: likely
Carved artifact entropy is 7.79, consistent with packed or encrypted content.
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 437542 bytes
SHA-256: fb15c50dff8b0ae92b586e8add5d7fa7a6e912964499d52282147585dcf196dc
Detection
ClamAV: Win.Trojan.Ag-4254306-1
Obfuscation or payload: likely
Carved artifact entropy is 7.82, consistent with packed or encrypted content.

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