Malicious RTF — malware analysis report

Static analysis result for SHA-256 85dc0bda7ec650ed…

MALICIOUS

RTF

55.8 KB
MD5: 75c84819f72c941c5ca7384308e2a137 SHA-1: 644acd7cefcb745206864dc1a1d08d8d6cbb0732 SHA-256: 85dc0bda7ec650ed90bfd3b6efd30a55ccbf83cd45d4421bffe31c81dcfbfa2a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that leverages a known vulnerability in the Equation Editor (CVE-2017-11882). This vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload. No specific family could be identified from the available evidence.

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_off00000113.bin
6e7526d321ffe460365b4ccd31abe03247522617ef245710127ef19e15945d6c		 rtf-objdata-decoded RTF \objdata at offset 0x113 3631 bytes

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