Malicious RTF — malware analysis report

Static analysis result for SHA-256 0a2230367fbe2f6d…

MALICIOUS

RTF

56.0 KB
MD5: 42cb64576104faa51db8d3c37e20a29e SHA-1: 034fec61d69c45e24ce3f26ea427972b255dd744 SHA-256: 0a2230367fbe2f6d795128c206650f8a1b0ef04279231d11169d1ab40b57c5ba
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 object is processed, 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_off00000111.bin
5d60c4b96995ff46aff4c42c39739f1575dea0651d2fada5d40645c8f6dc6173		 rtf-objdata-decoded RTF \objdata at offset 0x111 3631 bytes

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