Malicious RTF — malware analysis report

Static analysis result for SHA-256 700a3ec217c58506…

MALICIOUS

RTF

110.9 KB Created: 2021-07-16 07:42:00
MD5: deb23401ba54962ab5c81a4bd77b4324 SHA-1: 99c72f3a061154ae4f6e2a7f799b34e09f8c3785 SHA-256: 700a3ec217c585068f0268f7e5a20b9bd22b600f71e68841142c7039f10e192b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an RTF document containing an embedded OLE object. Static analysis identified a critical heuristic firing for CVE-2017-11882, indicating exploitation of the Equation Editor vulnerability. This vulnerability allows for arbitrary code execution, 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.
  • 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_off000030b3.bin
76dea2f4894260049f7efa57bed148b78af043e5c8e96485b47427b40fef9271		 rtf-objdata-decoded RTF \objdata at offset 0x30B3 3629 bytes

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