Malicious RTF — malware analysis report

Static analysis result for SHA-256 91a955548572d354…

MALICIOUS

RTF

54.1 KB
MD5: 9775741e3dc93351d38b684a76700f37 SHA-1: 5f244ff651d737f4ce36467661b16170d424a59a SHA-256: 91a955548572d354ce51704a8ed6d95ed40cc6dda0bec6ef83f36ec4149a002e
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 Microsoft Equation Editor (CVE-2017-11882). This vulnerability allows for arbitrary code execution when the object is processed, indicating the file's primary purpose is to exploit this flaw for initial execution.

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_off0000010d.bin
979f511748e55aeff6bb60ce91ba4f7a1024a13f0c4fff829ea2d7d9f31b4d68		 rtf-objdata-decoded RTF \objdata at offset 0x10D 3631 bytes

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