Malicious RTF — malware analysis report

Static analysis result for SHA-256 7cc96052b6d565f6…

MALICIOUS

RTF

68.0 KB
MD5: 632021d9569a6f7da20141a5725c0c19 SHA-1: 952cf0e6115237495b9ed3effa2b211ce4abc066 SHA-256: 7cc96052b6d565f6e539edd81ffe31ee36a7bfa82a2444f9108dd82d6d7e0f57
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 when the object is processed, indicating a likely exploit delivery mechanism. 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_off0000010f.bin
726b6fcb78db6903b7569c477d0c16d59b2095dfca774d3fba47fd4db6ae62ff		 rtf-objdata-decoded RTF \objdata at offset 0x10F 3631 bytes

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