Malicious RTF — malware analysis report

Static analysis result for SHA-256 67159e719397a0f4…

MALICIOUS

RTF

260.6 KB Created: 2021-02-12 04:30:00
MD5: 04ca3de745cdbb98bf29310eb5d60d8f SHA-1: 9954278624219a1f3cd844e1076cd139d1d82ce5 SHA-256: 67159e719397a0f4db0699ec7b26fe37d04030ab096bc80307d91a184e8e6d77
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an embedded OLE object that exploits the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution, indicating a malicious intent to compromise the user's system. The document body content appears to be a lure, unrelated to the exploit itself.

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_off000000fe.bin
6f2546660c8101ee0d9e665b909f246ad752d2bccf8a495e5f3cd8f35d9fe6fe		 rtf-objdata-decoded RTF \objdata at offset 0xFE 3628 bytes

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