Malicious RTF — malware analysis report

Static analysis result for SHA-256 3baa85146b8c220c…

MALICIOUS

RTF

115.3 KB Created: 2021-07-16 07:42:00
MD5: e2a03dfc741d8ef545fae812c3c2b99b SHA-1: 309fa9f8ac79637edd52b59f4602baef8a30f2b3 SHA-256: 3baa85146b8c220c51025d926a96914f884da8287c07a3f41a9e37670925b1e1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a critical vulnerability, CVE-2017-11882, related to the Equation Editor. This exploit allows for arbitrary code execution on the victim's machine. No document body or scripts were extracted, but the presence of this known exploit is sufficient evidence of malicious intent.

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_off000032d6.bin
3de9dab7dba9ce4b715c49832fc38ce34f64b803ceaa85344dadf4aaf68cad9a		 rtf-objdata-decoded RTF \objdata at offset 0x32D6 3629 bytes

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