Malicious RTF — malware analysis report

Static analysis result for SHA-256 49f3224273e2b953…

MALICIOUS

RTF

49.1 KB
MD5: e2165cdb673f5b3182b14d1c0d010c86 SHA-1: 559b41dae651c567cc31a1606cfd45ae58d4c30b SHA-256: 49f3224273e2b953297ac2407006bbd42745ba0c8068e3bf5046b781e4718eee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that leverages 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 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_off00000111.bin
ce8b4e8415bc37da314bd6ffb53669304a74eaed3306449806faeb471fb6ae2e		 rtf-objdata-decoded RTF \objdata at offset 0x111 3631 bytes

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