Malicious RTF — malware analysis report

Static analysis result for SHA-256 286dd7f1cfebb778…

MALICIOUS

RTF

80.0 KB
MD5: 83cbbd584356ea0880befcb50ab66af6 SHA-1: d94c9170c0a066033e3e7a4e081f3d3a514a27b7 SHA-256: 286dd7f1cfebb7788b3822609ea60ebae8a9851900bb18dd1772a1ba9123e4f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that exploits the CVE-2017-11882 vulnerability in Equation Editor. This vulnerability allows for arbitrary code execution when the document is opened, likely to download and run 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_off0000238d.bin
a9cadbe7cc03401739a82651d6ba7164a0fb5a5186c866978170872a4e30c93a		 rtf-objdata-decoded RTF \objdata at offset 0x238D 3631 bytes

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