Malicious RTF — malware analysis report

Static analysis result for SHA-256 68488a6ffb678a22…

MALICIOUS

RTF

115.1 KB Created: 2021-07-16 07:42:00
MD5: a3f9dc4e3edc2fa2f454d6274141c3be SHA-1: 91e114df7baaf59c7deaf4b2ca6cf83d3fab4e09 SHA-256: 68488a6ffb678a222d3992103eba44a1d05079394e5661f8523d4cb1d0686dc5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF document contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in the Equation Editor. This vulnerability allows for arbitrary code execution, indicating a malicious intent to compromise the user's system. The presence of the exploit and the RTF format strongly suggest it was delivered as a spearphishing attachment.

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_off00003319.bin
6937f6379aeb9890cef16218e99ac8c463366968181a6a56171c4ea25944b6ba		 rtf-objdata-decoded RTF \objdata at offset 0x3319 3613 bytes

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