Malicious RTF — malware analysis report

Static analysis result for SHA-256 f4a0f65e9161a266…

MALICIOUS

RTF

68.6 KB Created: 2016-11-27 22:42:00 First seen: 2019-01-11
MD5: c10dabb05a38edd8a9a0ddda1c9af10e SHA-1: 9aed05edab5d0200eb509ed22c8c30f19652814c SHA-256: f4a0f65e9161a266b557e3850e3d17f08b2843ee560f8a89ecf7059eba104e66
122 Risk Score

Malware Insights

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

The RTF document contains an OLE object that exploits CVE-2017-0199, a known vulnerability for remote code execution. This exploit attempts to download a secondary document from the URL http://95.141.38.110/mo/dnr/tmp/template.doc. The document body content is unrelated to the exploit, suggesting it is a lure.

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://185.168.186.36/up/dnr/scan/ In RTF body
    • http://95.141.38.110/mo/dnr/tmp/template.docIn 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_off0000b16f.bin rtf-objdata-decoded RTF \objdata at offset 0xB16F 2724 bytes
SHA-256: 5d5735ecbc809d70c2089946302aa0991f6c582148ba3a504a216a4d5e39bce7

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