Malicious RTF — malware analysis report

Static analysis result for SHA-256 395a5a46b8800d28…

MALICIOUS

RTF

56.1 KB
MD5: 63bf781d50eb513f98356b0cf7a80ab5 SHA-1: 031ebf483175eef6c699f34c7acabd1e12ab5944 SHA-256: 395a5a46b8800d28fa642003c3a9540ea48ab7f68001abe35dd79b73e601e452
160 Risk Score

Malware Insights

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

The RTF file contains an embedded OLE object that exploits the CVE-2017-11882 vulnerability in 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. The presence of the exploit indicates a malicious intent, likely delivered via spearphishing.

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_off0000010f.bin
3b566290f6b83c42d08dfeb7f7cc162c761f99df1857998198bce2df57b7e26b		 rtf-objdata-decoded RTF \objdata at offset 0x10F 3631 bytes

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