Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 299d8f6e645d0f2e…

MALICIOUS

Office (OOXML)

11.4 KB Created: 2018-03-21 06:54:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2019-04-18
MD5: 7a861f4f39aaa85c7547f7521544ed58 SHA-1: 6d093a2f27553f00b94b8d75032ed4e4c07ec71f SHA-256: 299d8f6e645d0f2e87ff4ec73540d502d13c14aac196853b783716af9582e52c
82 Risk Score

Malware Insights

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

The sample contains heuristics indicating it is related to CVE-2017-8759 and embeds an external OLE object pointing to a remote URL. This suggests the document is designed to exploit a vulnerability upon opening, likely to download and execute a secondary payload from the specified URL. The embedded URL is the primary indicator of compromise.

Heuristics 3

  • OOXML OLE2Link remote document — CVE-2017-8759 related high CVE related CVE_2017_8759_RELATED
    Document contains an o:OLEObject Type=Link whose external oleObject relationship fetches a remote Office-looking document. That is the OOXML OLE2Link staging shape used by CVE-2017-8759 campaigns when the remote document/WSDL supplies the SOAP moniker payload; the local file alone does not contain the WSDL body needed for an exact match.
  • External OLE object relationship high OOXML_EXTERNAL_OLE_OBJECT
    Document contains an oleObject relationship whose target is an external HTTP(S) URL. Office resolves this through OLE/object update paths rather than as a normal user-clicked hyperlink.
  • 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)
    • https://s3.amazonaws.com/rewqqq/SM.docIn document text (OOXML body / shared strings)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
emf_00.emf ooxml-emf OOXML EMF part: word/media/image1.emf 2508 bytes
SHA-256: 388f051b3b9ab6ca47d08ed945005cfccab90f77f7024abaa52319c96c345218

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