Malicious RTF — malware analysis report

Static analysis result for SHA-256 5fb26a425707096b…

MALICIOUS

RTF

155.0 KB
MD5: faea95fcc75e43a4c10487e3ae631f45 SHA-1: 6765e696002590786104bf23835ed6f57fb87e23 SHA-256: 5fb26a425707096b110ced5f17f271462bf37a7c24128eba91adf7d883ade763
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a critical heuristic for CVE-2017-11882, indicating exploitation of the Equation Editor vulnerability. This vulnerability allows for arbitrary code execution, which is the primary attack vector observed.

Heuristics 3

  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000023aa.bin
3319701a55851552f5cd8b5028f0c77371d14461aac83f66b2eb786f5e4a4bf8		 rtf-objdata-decoded RTF \objdata at offset 0x23AA 28445 bytes

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