Malicious RTF — malware analysis report

Static analysis result for SHA-256 27945e9d772f520c…

MALICIOUS

RTF

41.4 KB Created: 2017-12-06 08:20:00 First seen: 2017-12-09
MD5: f0a5e66e49a058e6411ea482fedc77f6 SHA-1: bd278338f284b40e13640e7ed099739dfcf57434 SHA-256: 27945e9d772f520cb2ea6e74142555ca8cf552f9f640e348e0f5aafa46533f27
122 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an OLE object with an automatically linked URL, identified as a weaponized exploit for CVE-2017-0199. This exploit is designed to download and execute a second-stage payload from the embedded URL http://kenion.com.mx/vendors/htadavido.hta. The HTA file is likely to contain further malicious content or scripts.

Heuristics 4

  • CVE-2017-0199 (OLE2Link / weaponized URL) critical CVE exact CVE_2017_0199_WEAPONIZED_URL
    RTF contains a URL Moniker OLE link to a script/HTA/template-style remote loader, matching the tighter static CVE-2017-0199 shape.
  • 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://kenion.com.mx/vendors/htadavido.hta 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_off00002786.bin rtf-objdata-decoded RTF \objdata at offset 0x2786 3640 bytes
SHA-256: 0f6ba21ae64efbe2cdea90c4d7cac554f4a00e6d8586d6f0c8b670bb42c7776d

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