Malicious RTF — malware analysis report

Static analysis result for SHA-256 075aac284c5ff58b…

MALICIOUS

RTF

52.8 KB
MD5: c7daa8b64c6af9a2ac10829aff4678c8 SHA-1: 1d29c4535522763b7bf6520f9a0eedd82e7a20e1 SHA-256: 075aac284c5ff58b3e984cde883d61d6c9edde0e6e3c29494444722450b7f2c5
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 Microsoft 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_off00000113.bin
47b5408ff1e7f660642165d84577f280c340244db85bf92c07cdec1f809e994d		 rtf-objdata-decoded RTF \objdata at offset 0x113 3631 bytes

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