Win.Dropper.DarkKomet-9964717-0 — Office (OOXML) malware analysis

Heuristics 6

• ClamAV: Win.Dropper.DarkKomet-9964717-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Win.Dropper.DarkKomet-9964717-0
• Ole10Native package payload is a download-and-execute script critical OFFICE_PACKAGE_SCRIPT_DROPPER
  The OLE Package's embedded payload contains a script that hosts a shell (PowerShell/WScript/mshta), fetches a remote resource, and executes it — a download-and-run dropper. Embedding such a script inside an Office document via the Object Packager is a direct user-execution delivery technique (MITRE T1204.002), not a benign attachment.
• 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
• Payload URL recovered from embedded OLE object (11 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://www.usertrust.com1 Embedded OLE package script

  • http://ocsp.usertrust.com0Embedded OLE package script
  • https://secure.comodo.net/CPS0AEmbedded OLE package script
  • http://ocsp.comodoca.com0In document text (OOXML body / shared strings)
  • http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=61601&lngWId=1In document text (OOXML body / shared strings)
  • http://ocsp.comodoca.com0(In document text (OOXML body / shared strings)
  • http://ns.adobe.com/xap/1.0/In document text (OOXML body / shared strings)
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#In document text (OOXML body / shared strings)
  • http://purl.org/dc/elements/1.1/In document text (OOXML body / shared strings)
  • http://ns.adobe.com/xap/1.0/mm/In document text (OOXML body / shared strings)
  • http://ns.adobe.com/xap/1.0/sType/ResourceRef#In document text (OOXML body / shared strings)
  • http://ns.adobe.com/tiff/1.0/In document text (OOXML body / shared strings)
  • http://ns.adobe.com/exif/1.0/In document text (OOXML body / shared strings)
  • http://ns.adobe.com/photoshop/1.0/In document text (OOXML body / shared strings)
  • http://www.iec.chIn document text (OOXML body / shared strings)
  • http://crl.usertrust.com/AddTrustExternalCARoot.crl05Embedded OLE package script
  • http://crl.usertrust.com/UTN-USERFirst-Object.crl05Embedded OLE package script
  • http://crl.usertrust.com/UTN-USERFirst-Object.crl0tEmbedded OLE package script
  • http://crt.usertrust.com/UTNAddTrustObject_CA.crt0%Embedded OLE package script
  • http://crl.comodoca.com/COMODOCodeSigningCA2.crl0rEmbedded OLE package script
  • http://crt.comodoca.com/COMODOCodeSigningCA2.crt0$In document text (OOXML body / shared strings)

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