Malicious RTF — malware analysis report

Static analysis result for SHA-256 195d836a01b8043e…

MALICIOUS

RTF

120.0 KB Created: 2021-09-04 08:26:00 First seen: 2021-09-16
MD5: 9b3a1fe74aacc3fcc44426903eb9fde1 SHA-1: ce4b4b691e25f073a7556f3e4ad166bd2b9bd834 SHA-256: 195d836a01b8043ed533d45f6dd3f801aeaf969152147f1974fc76a738f36f49
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 a malicious intent to compromise the system. No document body or scripts were extracted, but the critical heuristic firing is sufficient evidence of exploitation.

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 In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000031bf.bin rtf-objdata-decoded RTF \objdata at offset 0x31BF 3627 bytes
SHA-256: 5d2fede66a017b7e77d76299a823e2b47f173ae66ea06cc9778b34ad018bbb50

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