Malicious RTF — malware analysis report

Static analysis result for SHA-256 ce529928ad11344d…

MALICIOUS

RTF

50.6 KB
MD5: e7af0d3e56adcf5fde762b27301a02a4 SHA-1: 0052062c12cdfc2594e446f72aded50ee6ca507a SHA-256: ce529928ad11344db1b3d4af917951969c7d54ec47cb804840f809454ff9f940
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF document contains an embedded OLE object that leverages a known vulnerability, CVE-2017-11882, within the Equation Editor. This exploit allows for arbitrary code execution, likely to download and run a secondary payload. The presence of the Equation Editor CLSID and the specific CVE firing strongly indicate this exploitation vector.

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_off00000110.bin
1bd80cdf03d896abfde6db4ec01e5caaf505a853628dff45e44d0921936fafa7		 rtf-objdata-decoded RTF \objdata at offset 0x110 3631 bytes

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