Malicious RTF — malware analysis report

Static analysis result for SHA-256 39be5cb8616c6fef…

MALICIOUS

RTF

56.4 KB
MD5: c19468454bd03dec8bba4b34802a452f SHA-1: cb266e54d50b34cbaba22601ca62a01dc2127b9b SHA-256: 39be5cb8616c6feff8a87155a59c98ab8fb5490fef5b256a0f6d2ce7902d552b
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 the Equation Editor. This vulnerability allows for arbitrary code execution when the document is opened, likely leading to the download and execution of 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_off0000010c.bin
9008f9b901f489b3c8b7b57528eb33383cb2cf7b998554ea98149d8d2bb319c9		 rtf-objdata-decoded RTF \objdata at offset 0x10C 3631 bytes

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