Malicious RTF — malware analysis report

Static analysis result for SHA-256 e6d03db512cd6398…

MALICIOUS

RTF

101.5 KB Created: 2021-07-16 07:42:00
MD5: 57fde54101db774e3fe5ad50e97d6c61 SHA-1: 1b4324b697914677fe1b96dfcae95b9bf84f41de SHA-256: e6d03db512cd6398929731fc357969bef0fee7074fbf45ac47a3443a01a3fba9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability. This vulnerability allows for arbitrary code execution when the Equation Editor is rendered. The exploit appears to be a classic example of using this known vulnerability for initial execution.

Heuristics 4

  • CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882
    Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • 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://schemas.microsoft.com/office/word/2003/wordml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00003266.bin
0109f29ba73d8a06ba5b0763ff15e485d8a02093d47d8d94baa960f825669f10		 rtf-objdata-decoded RTF \objdata at offset 0x3266 3631 bytes

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