Malicious RTF — malware analysis report

Static analysis result for SHA-256 933c38381b640a3c…

MALICIOUS

RTF

112.8 KB Created: 2021-07-16 07:42:00
MD5: bf7ef50649237e38ca01446f325d777b SHA-1: 0dcaea70255636519380be27e923fc77e3aeda4e SHA-256: 933c38381b640a3cf64e9637b033bd18074b80b702b07822dc948cbdc4bdeb72
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, indicating the file is designed to exploit this known flaw. No specific family could be identified, but the exploit mechanism is clear.

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_off000032c1.bin
cf14fbc4a4a103742fe082c07a9e30d84dca897c774851c0ed31cd2432fe74fd		 rtf-objdata-decoded RTF \objdata at offset 0x32C1 3629 bytes

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