Malicious RTF — malware analysis report

Static analysis result for SHA-256 5f19eabad776b0df…

MALICIOUS

RTF

100.8 KB Created: 2021-07-16 07:42:00
MD5: 707f244b5cd77cbfd8dcd0afe985792f SHA-1: 048d52078556ff46005e94115dfad32a97d93b12 SHA-256: 5f19eabad776b0df130eb8f894b6bbff5241025cbe3210ec1571ab61bf2e8d08
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 exploit allows for the execution of arbitrary code, likely to download and run a secondary payload. The embedded URL is benign and not considered an IOC.

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_off0000311f.bin
0109f29ba73d8a06ba5b0763ff15e485d8a02093d47d8d94baa960f825669f10		 rtf-objdata-decoded RTF \objdata at offset 0x311F 3631 bytes

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