Malicious RTF — malware analysis report

Static analysis result for SHA-256 721c2e17c395a7f6…

MALICIOUS

RTF

50.3 KB
MD5: 675143674e6f7a478b2674029f594ea6 SHA-1: d5e657a7f4e1be8b62d0e82b931b62c751e143bf SHA-256: 721c2e17c395a7f630cc692462c688f88bc55bc977be04ef0f66faee15e8481d
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 leading to the download and execution of 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_off00000109.bin
e9961284c6e568bc42cf5a65711902a81fe8b72d9819d7ade2834edf32ce33d1		 rtf-objdata-decoded RTF \objdata at offset 0x109 3631 bytes

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