Malicious RTF — malware analysis report

Static analysis result for SHA-256 c75d61a8a63c254b…

MALICIOUS

RTF

84.2 KB
MD5: d45cb753c2bcb2287fb323827fee8cd4 SHA-1: 22019c6c1030546661db85e57deeee11f8d3a91b SHA-256: c75d61a8a63c254b4028ad6dd32427a756070615cebe4ddf2f29f8792445d289
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers a critical vulnerability in the Equation Editor (CVE-2017-11882). This vulnerability is known to be exploited for client-side code execution, likely to download and run a secondary payload.

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_off000023e5.bin
94c7cfed36ce1672076e17f33dde5bf384bda35cf77bc07b412427a9885ce1bc		 rtf-objdata-decoded RTF \objdata at offset 0x23E5 3631 bytes

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