Malicious RTF — malware analysis report

Static analysis result for SHA-256 e358d72c58f4ff45…

MALICIOUS

RTF

87.2 KB
MD5: 491c7699303762ea07e2a9a468f1382b SHA-1: b9ebe53b2681ebea13c21ab6490be0844d283474 SHA-256: e358d72c58f4ff45c0d729cc0b54bef9fa220d768660415f1ac56eeab6507c9e
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an RTF document containing an embedded OLE object. Static analysis identified a critical heuristic firing for CVE-2017-11882, indicating exploitation of the Equation Editor vulnerability. This vulnerability allows for arbitrary code execution, which is the likely intent of this malicious file.

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_off00002342.bin
bdf04edd166837bf39fb0f05f3e079238825d41b9a0e9e9cb76d47f58eb41613		 rtf-objdata-decoded RTF \objdata at offset 0x2342 3631 bytes

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