Malicious RTF — malware analysis report

Static analysis result for SHA-256 85c93916c3ddd658…

MALICIOUS

RTF

56.6 KB
MD5: c51c53f6fe5f11a2c10912f4b28b9b75 SHA-1: 982881932faa9d1606948b0c0eb808866c145261 SHA-256: 85c93916c3ddd658787c650e13ad3bfdeacd0ae83039dda050c1499c0ef14267
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that leverages a known vulnerability in Microsoft Equation Editor (CVE-2017-11882). This vulnerability allows for the execution of arbitrary code upon opening the document, likely to download and run 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_off00000117.bin
a448db8d74761dfcc5f22f941253ef4b25cb699c781751677e57e4998f14f1a2		 rtf-objdata-decoded RTF \objdata at offset 0x117 3631 bytes

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