Malicious RTF — malware analysis report

Static analysis result for SHA-256 71f13dde7da7df3b…

MALICIOUS

RTF

49.1 KB Created: 2018-03-18 03:48:00 First seen: 2018-09-04
MD5: 270d7cc702b8d107e34beb39303b0abd SHA-1: b2411ab28901f4c17a43044e3be5465cab4df383 SHA-256: 71f13dde7da7df3b6af8563958acdca5fc6be5b62bc25a984e32f2f9cc6fc1b8
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 targets the URL https://www.datafilehost.com/d/827c4800 to download and execute a secondary payload. This indicates a likely spearphishing attachment designed to deliver malware.

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 https://www.datafilehost.com/d/827c4800 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_off00002c00.bin rtf-objdata-decoded RTF \objdata at offset 0x2C00 3714 bytes
SHA-256: a49c74f22d8181c705c4d436904b00fb8a8868af3d0b75e9efd5bd79800627e7

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