Rtf.Downloader.CVE_2017-6336326-3 — RTF malware analysis

Static analysis result for SHA-256 525e07f0bd48a72a…

MALICIOUS

RTF

94.5 KB Created: 2017-09-17 23:31:00 First seen: 2017-10-10
MD5: d3b7518386e87051df2ef6a039ec77a5 SHA-1: aaa79f399684d467b00c02af0a4cb62cd6b74ce1 SHA-256: 525e07f0bd48a72a1650cde28b5a9adac5a070f62c5035b81c0bfc7b58534b44
182 Risk Score

Malware Insights

Rtf.Downloader.CVE_2017-6336326-3 · confidence 95%

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

The RTF file contains OLE object data and is flagged for CVE-2017-8759, a SOAP Moniker vulnerability. This indicates the file is designed to exploit this vulnerability to download and execute a secondary payload. ClamAV also identifies it as a downloader, supporting this conclusion.

Heuristics 5

  • SOAP Moniker — CVE-2017-8759 (SOAP WSDL RCE) critical CVE related CVE_2017_8759
    RTF \objdata decodes to OLE data containing the SOAP Moniker — CVE-2017-8759 (SOAP WSDL RCE) CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
  • ClamAV: Rtf.Downloader.CVE_2017-6336326-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Downloader.CVE_2017-6336326-3
  • 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://schemas.microsoft.com/office/word/2003/word In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000a678.bin rtf-objdata-decoded RTF \objdata at offset 0xA678 4272 bytes
SHA-256: ca45bad36ea3c1973fa5ca80de6ec17bbf644c37b3cae7b90f3b386f7d449030

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