Malicious RTF — malware analysis report

Static analysis result for SHA-256 eaf8b5652dea9851…

MALICIOUS

RTF

82.8 KB
MD5: e7f8bcb543c76f4344b721a986d3a917 SHA-1: 1d6369a5cda91077176d74f39fb4f57900575910 SHA-256: eaf8b5652dea985123e6d2f21bb6a16c744d2fb1968e1526d1a285bbf95e3fda
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 Equation Editor. This vulnerability allows for arbitrary code execution when the document is opened, likely to download and run a second-stage 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_off0000230a.bin
4f9cd68fc4514053508e428f6535c2e1d96878de2ddc41a9b2b478dde0b9af2d		 rtf-objdata-decoded RTF \objdata at offset 0x230A 3631 bytes

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