Malicious RTF — malware analysis report

Static analysis result for SHA-256 dbb4d349b6f19078…

MALICIOUS

RTF

5.8 KB Created: 2017-08-24 23:01:00 First seen: 2017-08-27
MD5: ad402031d0018c66e71ef990ef0a3005 SHA-1: e872ffb9ef05260092bcf22085a14576db428d1e SHA-256: dbb4d349b6f19078639434ce705b3f386329e183d56a2bbed41d4b8f4dab68f7
182 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, a known vulnerability for remote code execution. The exploit is configured to download and execute a secondary payload from the URL https://www.iso9001-certificare.ro/a/File.hta. This indicates a likely initial access vector via spearphishing, leading to the execution of a malicious payload.

Heuristics 5

  • 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.
  • ClamAV: Rtf.Exploit.CVE_2017_0199-6335035-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_0199-6335035-0
  • 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 https://www.iso9001-certificare.ro/a/File.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_off00000266.bin rtf-objdata-decoded RTF \objdata at offset 0x266 2601 bytes
SHA-256: 12d49002230983c4a3a7790d288bdbf34e77f4f5661b317f6387420deae8b324

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