Malicious RTF — malware analysis report

Static analysis result for SHA-256 1ab66c52c8e3ce3e…

MALICIOUS

RTF

113.1 KB Created: 2021-07-16 07:42:00
MD5: 50cbc0138c14811f577bc9c31259886e SHA-1: 690005fa2952c28c7b110813407fa90ade30a824 SHA-256: 1ab66c52c8e3ce3e81e60b747b3b679c2a418df32d34d14ad90d6205df948545
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 exploit is delivered via a malformed FONT record within the RTF object.

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_off000032d4.bin
fc9412e3cbc75ef9ad3767da116a572d4712c71701087c353f5e2e13d39996b9		 rtf-objdata-decoded RTF \objdata at offset 0x32D4 3629 bytes

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