Malicious RTF — malware analysis report

Static analysis result for SHA-256 3b411b6ac450f9ec…

MALICIOUS

RTF

2.40 MB Created: 2017-08-30 02:19:00 First seen: 2017-09-14
MD5: 27497837287c934fcd584a6d99aeb9f3 SHA-1: 35538250545267a4033896119345b9018b438c99 SHA-256: 3b411b6ac450f9ecbeb9903ac0b9afafa12447b23bb522a1d4b82a54b78d441d
182 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an OLE object with excessive hex-encoded data, indicative of a hidden payload. A critical heuristic identified CVE-2017-0199, which is used to weaponize an OLE object to automatically link to and download a payload from the FTP URL ftp://desertsands:dse_2609@desertsands-est.com/httpdocs/css/template.hta. This exploit facilitates client execution by leveraging a vulnerability in Microsoft Office.

Heuristics 6

  • 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.
  • 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.
  • Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX
    RTF contains ~2485KB of hex-encoded data inside \objdata sections — may hide a payload
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM
    RTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.
  • 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://theoryrelativityquad.info/uag/uag.php 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_off00002ace.bin rtf-objdata-decoded RTF \objdata at offset 0x2ACE 4290 bytes
SHA-256: 506e018aac3d584f06d1d276508bc04d5a83a88e623f13af3f363fdfa0655a2b

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