Malicious RTF — malware analysis report

Static analysis result for SHA-256 bfaffc7c73e73db5…

MALICIOUS

RTF

37.3 KB Created: 2017-11-13 18:55:00 First seen: 2017-11-20
MD5: eee8eaa2a35f71848a3fe53bacc77d31 SHA-1: 697447b863c7fa8f25b913ae50e44cd7a8fb9e95 SHA-256: bfaffc7c73e73db5efae0feae7f5d65e7fff5d117ba5f7e4949bef098c28b5bf
182 Risk Score

Malware Insights

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

The RTF file contains embedded OLE object data and an automatically linked OLE object, indicative of exploitation. Critical heuristics identify CVE-2017-8759 (SOAP Moniker RCE) and ClamAV detection as Rtf.Downloader.CVE_2017-6336326-3. This suggests the file is designed to exploit this vulnerability to download and execute a secondary payload, likely delivered via spearphishing.

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/wordml In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002728.bin rtf-objdata-decoded RTF \objdata at offset 0x2728 3640 bytes
SHA-256: 8d8451174d10e3f0af330dadc280c73ae6d8f39ef705d39f318a55a7b502dbf4

Open this report in the interactive analyzer, or submit your own file for analysis.