Malicious RTF — malware analysis report

Static analysis result for SHA-256 89fb9ca69c71af13…

MALICIOUS

RTF

158.0 KB
MD5: 5aa327fb1e735750a197787bc708a167 SHA-1: 0c171fa4eb99d571363d7de12c88b75045c4d404 SHA-256: 89fb9ca69c71af134d00b6181d6513dc79bb9f2688cb4eaed31c4c240e3c6e7c
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers a critical heuristic for CVE-2017-11882, indicating exploitation of the Equation Editor vulnerability. This vulnerability allows for arbitrary code execution on the victim's machine.

Heuristics 3

  • 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.
  • 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_off0000238d.bin
fbcf1a2c9e60836c211df66b1c052356d5087c92f480ff7b83f11c09660707c1		 rtf-objdata-decoded RTF \objdata at offset 0x238D 28445 bytes

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