Malicious RTF — malware analysis report

Static analysis result for SHA-256 b77e9265321afe42…

MALICIOUS

RTF

56.7 KB
MD5: 31101fe964c24e4e71ac51fa552c4780 SHA-1: 178a0bc64193b61f30f8aa6fe06a59bcf970baa2 SHA-256: b77e9265321afe42707489b0d5c9dee282aeb8a99c7ee5d9b7bd26c048c5222b
160 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 when the malformed object is processed, indicating a likely exploit attempt.

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_off0000010e.bin
916c2763ce36e187f97fdc3b099d696a2506ca6a431f1d1dda6402c2a2569892		 rtf-objdata-decoded RTF \objdata at offset 0x10E 3631 bytes

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