Malicious RTF — malware analysis report

Static analysis result for SHA-256 62dc3a58cdd2cc5b…

MALICIOUS

RTF

112.6 KB Created: 2021-07-16 07:42:00
MD5: 77fefd4d0e884ac638f76d1dc0725800 SHA-1: 5ff4df71e3b147389266d02afbe47a9ebed2a82a SHA-256: 62dc3a58cdd2cc5bb3e5b7c0a0b16268ccb32c666381caddfacdd735767ec6b1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution when the malformed object data is processed. The embedded object data is the primary indicator of compromise.

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.
  • 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.microsoft.com/office/word/2003/wordml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000032a3.bin
530d2e7b7eccd0461fbd432cb64b05eb795aae0b82112d144a5b3b1ae7dea969		 rtf-objdata-decoded RTF \objdata at offset 0x32A3 3629 bytes

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