Malicious RTF — malware analysis report

Static analysis result for SHA-256 d3cba5dcdd6eca4a…

MALICIOUS

RTF

36.6 KB Created: 2016-11-27 22:42:00 First seen: 2019-01-11
MD5: 4a81b6ac8aa0f86719a574d7546d563f SHA-1: e985c7e32fc3af2c99d4158395083c0e7f5b417a SHA-256: d3cba5dcdd6eca4ab2507c2fc1f1f524205d15fd06230163beac3154785c4055
122 Risk Score

Malware Insights

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

The RTF file contains an OLE object that exploits CVE-2017-0199, indicated by the critical heuristic firing. This exploit is designed to fetch and execute a secondary document from the URL http://95.46.99.199/template.doc, suggesting a downloader or dropper functionality. The presence of an automatically linked OLE object further supports the exploitation vector.

Heuristics 4

  • CVE-2017-0199 (OLE2Link / remote URL Moniker) critical CVE likely CVE_2017_0199
    RTF contains a URL Moniker OLE link whose decoded target is remote. Office can fetch and process the response through the CVE-2017-0199 OLE2Link attack path, but the server-side content type is not proven statically.
  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • 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://95.46.99.199/template.doc In RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000317e.bin rtf-objdata-decoded RTF \objdata at offset 0x317E 2724 bytes
SHA-256: b50b837ae63be8d54a4f3097548eb8dcc8c0dd946fd7323853a1f70bd869aee6

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