Malicious RTF — malware analysis report

Static analysis result for SHA-256 e166de4eecf9006b…

MALICIOUS

RTF

115.7 KB Created: 2021-07-16 07:42:00
MD5: b84264098a7b679c0a7bc4f7ac93a820 SHA-1: b613db287dcaf0bb538a6b336c69d081bbc3c8b4 SHA-256: e166de4eecf9006b9117fd62b0558f48283738d0f9c6b9f5d13b7b465d973109
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload. No specific family could be identified, but the exploit is a common method for initial 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_off000032a9.bin
7eacd66dc7a7f8038139ddb9a88905952aad1c9c4b748e306eba2cfc5a364d60		 rtf-objdata-decoded RTF \objdata at offset 0x32A9 3629 bytes

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