Malicious RTF — malware analysis report

Static analysis result for SHA-256 9186f9792c1dadca…

MALICIOUS

RTF

54.5 KB
MD5: 0fea92ef9abb92b5f25c28ca76e3b9e7 SHA-1: 3337abc7cb3a9d2110ac6decfed875cda3026f54 SHA-256: 9186f9792c1dadcad73006b63663b919d3f61c94d2624c0aa6f0d0bad468195b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that leverages a known vulnerability in Microsoft Equation Editor (CVE-2017-11882). This vulnerability allows for arbitrary code execution, which is the primary attack vector observed. No further payloads or network indicators were extracted from this specific file.

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
1fa3a05a3a800d825d3fcae6cb6ae72b06f7baa3bf23d098cfd0e435914b3906		 rtf-objdata-decoded RTF \objdata at offset 0x110 3631 bytes

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