Malicious RTF — malware analysis report

Static analysis result for SHA-256 674675a847d7c50e…

MALICIOUS

RTF

48.5 KB
MD5: decfe358be5cbd918b8519229211085b SHA-1: c09e2afe53b9a803a702b51b38813b24b755e497 SHA-256: 674675a847d7c50e47278795fb26101160b77743819c19c02923488eb9f797e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that exploits the Equation Editor vulnerability CVE-2017-11882. This vulnerability allows for arbitrary code execution when the object is processed. The exploit is triggered by a FONT record overflow within the decoded RTF object.

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_off00000106.bin
5fb0723fc3d7351769d7138fe3c5afd50ef07e8bc3c8cd00446891f5d0153c2c		 rtf-objdata-decoded RTF \objdata at offset 0x106 3631 bytes

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