Malicious RTF — malware analysis report

Static analysis result for SHA-256 46623b9c072d1469…

MALICIOUS

RTF

55.8 KB
MD5: 5eb78dbc432064e7f0c4c111888d0ce6 SHA-1: bcadde4a1a11e0a7da1319cdb45acc755e303d80 SHA-256: 46623b9c072d146905cf2b1b2b9c1e76f3212bd2838cd29659dad033f4f47e5e
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 Equation Editor vulnerability CVE-2017-11882. This vulnerability allows for arbitrary code execution when the object is processed. The presence of the OLE object and the specific Equation Editor CLSID strongly indicate this exploit.

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
cf748f51deafeedcfe984d2af54d6c565f11f8a9481ee15addf17b8e8c201ea1		 rtf-objdata-decoded RTF \objdata at offset 0x10F 3631 bytes

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