Malicious RTF — malware analysis report

Static analysis result for SHA-256 d6ad6d7e767c64e0…

MALICIOUS

RTF

52.4 KB
MD5: eacd01adf527b20935b280115ab36c79 SHA-1: 7680bdc7025d67b3b57aa12f36eaa3591cb92ee0 SHA-256: d6ad6d7e767c64e013d7e818e63c61585f174cb62302a629a90b1baaa282ef64
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that leverages a known vulnerability in Microsoft Equation Editor (CVE-2017-11882). This vulnerability allows for arbitrary code execution when the object is processed. The critical heuristic firings directly indicate the presence and exploitation of this specific CVE. No further stages or IOCs were identified in the static analysis.

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_off00000112.bin
e478d079fac99748ee47d64c12da21ec42c766f4ca5e77983b0fc26320ab0259		 rtf-objdata-decoded RTF \objdata at offset 0x112 3631 bytes

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