Malicious RTF — malware analysis report

Static analysis result for SHA-256 343e698f0ed9adc3…

MALICIOUS

RTF

48.1 KB
MD5: 5f5d5f22f61eae34b5a8e84d261ccf8b SHA-1: a30fe9fbbfb1b5658989a0f8ada6271022e69471 SHA-256: 343e698f0ed9adc334bbb920737fcbe1052363e648f110a8b3a4a53b2115e1da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that exploits the Equation Editor vulnerability CVE-2017-11882. This vulnerability allows for arbitrary code execution when the object is processed. The exploit targets a font record overflow within the Equation Editor. No further stages or specific family indicators were identified.

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.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • 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_off00000110.bin
eb9225addcf2207be77b83513438a3830bd36a548be7f027cff9f21652b9ca3d		 rtf-objdata-decoded RTF \objdata at offset 0x110 3631 bytes

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