Malicious RTF — malware analysis report

Static analysis result for SHA-256 9bd9eb1a1a1042ea…

MALICIOUS

RTF

49.2 KB
MD5: 0ccc99d36ef33dcdcc2f684816167db5 SHA-1: 20c48fa2952ba0c2b7d2d7a742e427c684b46d7c SHA-256: 9bd9eb1a1a1042eaaced8561b7e4a3cdc4afebb64c7dc6f0d1538448167e7556
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that exploits the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution when the object is processed. No further payloads or network indicators were extracted from this sample.

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_off00000113.bin
d3c57525e9bcc98d35043acac0c611c90e65054a31203d71563f1ee1a206a28f		 rtf-objdata-decoded RTF \objdata at offset 0x113 3631 bytes

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