Malicious RTF — malware analysis report

Static analysis result for SHA-256 ced73bfa8e0ab743…

MALICIOUS

RTF

78.9 KB
MD5: 22cce83bcc15fb42f80c3c31a19f899c SHA-1: 995a2b3bcc414e253bd3e097dd270727b2ea60f1 SHA-256: ced73bfa8e0ab743ff0859291066ea6e31bbf3be10a1986386131d90d304e36d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that leverages a known vulnerability in the Equation Editor (CVE-2017-11882). This vulnerability allows for the execution of arbitrary code upon opening the document, likely to download and execute a secondary payload.

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.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000023b6.bin
b6985adaa6f29b4f98763edcaf10506f9675c6d2145f0ac5d68412809e0ad33c		 rtf-objdata-decoded RTF \objdata at offset 0x23B6 3631 bytes

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