Malicious RTF — malware analysis report

Static analysis result for SHA-256 cb14685c928329ce…

MALICIOUS

RTF

36.8 KB Created: 2017-08-22 05:07:00 First seen: 2017-08-27
MD5: ea05823c11342cbbd58db787936e49cd SHA-1: 63e0319f157443882ae5be5f0a1f9111f7013683 SHA-256: cb14685c928329ce4f006c5362ddb7f3d8a26dcad838ba89ee069385c279f344
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 leverages CVE-2017-0199 to fetch a remote resource. The embedded URL 'http://192.168.182.137/' is highly suspicious and likely serves as a download location for a secondary malicious payload. This exploit is commonly used in targeted attacks delivered via email attachments.

Heuristics 5

  • 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.
  • 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 http://192.168.182.137/ 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_off00002a81.bin rtf-objdata-decoded RTF \objdata at offset 0x2A81 2724 bytes
SHA-256: d4f049cf5bb2672b8b110b75d130a828434736b2b7a27f52e2ba538de5a50519

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