Malicious RTF — malware analysis report

Static analysis result for SHA-256 fb101b33f92b411c…

MALICIOUS

RTF

48.4 KB
MD5: e24c776aa9271478f50ccc899ce34f94 SHA-1: 6b2d7047c49db4556b8cd18a086ef699c47388a7 SHA-256: fb101b33f92b411c93e754fb64808ee2b0e1d98161ebf5bcfff9e456297aa9ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file 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_off0000010e.bin
11b0e02bb2df800e0ac45efa602034b98f2b7793d38518dcc30c6db953f5472f		 rtf-objdata-decoded RTF \objdata at offset 0x10E 3631 bytes

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