Malicious RTF — malware analysis report

Static analysis result for SHA-256 fc20930a16efcf60…

MALICIOUS

RTF

55.1 KB Created: 2018-03-26 13:20:00 First seen: 2020-02-04
MD5: 2380346013b1d415b1a2f51fd9615070 SHA-1: 11058a510ee39950e01537a07a850bfe821bebfa SHA-256: fc20930a16efcf60f7450c520ca600c0920332d9052acf7c1131f3a394571926
122 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an OLE object that exploits CVE-2017-0199, embedding a URL that points to a HTA file. This indicates the file is designed to download and execute a second-stage payload from the specified URL, likely leading to further compromise.

Heuristics 4

  • 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.
  • 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://a.doko.moe/gauieq.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_off00005e5d.bin rtf-objdata-decoded RTF \objdata at offset 0x5E5D 3640 bytes
SHA-256: da264ef18d607e488804ee3fdb3800840e8aa022f36c92b73d5a1c855d6c2120

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