Win.Dropper.NetWire-7947909-0 — Office (OOXML) malware analysis

Static analysis result for SHA-256 c0d3ee770d087ce2…

MALICIOUS

Office (OOXML)

1.92 MB Created: 2018-09-07 14:01:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2019-09-30
MD5: 850c22dd8b02320776c755df1ef47875 SHA-1: d969391ebaf2d35cdf3fdc8af7f6a3cadff432e9 SHA-256: c0d3ee770d087ce21aeaf60bc2a03a56edc5c1acd868e5278ec70327836b59bd
224 Risk Score

Malware Insights

Win.Dropper.NetWire-7947909-0 · confidence 95%

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1129 Shared Content

The file is identified as malicious by ClamAV as Win.Dropper.NetWire-7947909-0. Static analysis revealed an embedded OLE object containing an executable payload, strongly indicating exploitation of CVE-2026-21514. The embedded object is designed to drop an auto-executable file, likely for further malicious activity.

Heuristics 6

  • ClamAV: Win.Dropper.NetWire-7947909-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Dropper.NetWire-7947909-0
  • 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 medium 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.
  • Payload URL recovered from embedded OLE object (15 URLs) 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://ocsp.thawte.com0 In document text (OOXML body / shared strings)
    • http://ts-ocsp.ws.symantec.com07In document text (OOXML body / shared strings)
    • http://ocsp.digicert.com0NIn document text (OOXML body / shared strings)
    • http://ocsp.digicert.com0CIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasIn 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)
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In document text (OOXML body / shared strings)
    • http://ns.adobe.com/pdf/1.3/In document text (OOXML body / shared strings)
    • http://ns.adobe.com/xap/1.0/In document text (OOXML body / shared strings)
    • http://www.openssl.org/support/faq.htmlIn document text (OOXML body / shared strings)
    • http://crl.thawte.com/ThawteTimestampingCA.crl0In document text (OOXML body / shared strings)
    • http://ts-aia.ws.symantec.com/tss-ca-g2.cer0In document text (OOXML body / shared strings)
    • http://ts-crl.ws.symantec.com/tss-ca-g2.crl0In document text (OOXML body / shared strings)
    • http://crl3.digicert.com/sha2-assured-cs-g1.crl05In document text (OOXML body / shared strings)
    • http://crl4.digicert.com/sha2-assured-cs-g1.crl0KIn document text (OOXML body / shared strings)
    • https://www.digicert.com/CPS0In document text (OOXML body / shared strings)
    • http://cacerts.digicert.com/DigiCertSHA2AssuredIDCodeSigningCA.crt0In document text (OOXML body / shared strings)
    • http://cacerts.digicert.com/DigiCertAssuredIDRootCA.crt0In document text (OOXML body / shared strings)
    • http://crl4.digicert.com/DigiCertAssuredIDRootCA.crl0In document text (OOXML body / shared strings)
    • http://crl3.digicert.com/DigiCertAssuredIDRootCA.crl0OIn 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 2926080 bytes
SHA-256: 70286883d333cfa0a4b9f319d570c2973241e5f5812d3bed35a74b5e392facb5
Detection
ClamAV: Win.Dropper.NetWire-7947909-0
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: NOP sled, SC_GETPC_CALL, SC_GETPC_CALL
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 2900532 bytes
SHA-256: c9378c1796c3a45b629de4c26b09ea2be82ecae07ebeb923bc19882fbd0da41b
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: NOP sled, SC_GETPC_CALL, SC_GETPC_CALL
emf_00.emf ooxml-emf OOXML EMF part: word/media/image2.emf 5456 bytes
SHA-256: 1699696492f4a3f0d084402bc9b39848789e4742dc4db8618fdb04f9a2285711