Malicious RTF — malware analysis report

Static analysis result for SHA-256 c9231fb2ef2b33b7…

MALICIOUS

RTF

49.2 KB
MD5: 4c4468feaf5d4e0aab843f7ebb1b2ea6 SHA-1: 6e2f5dc1783b966cc8a89d761f68f36c0f8b2a91 SHA-256: c9231fb2ef2b33b792b1e92198664849d6990ac77bbc4583038fa75a7119cc17
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers a critical vulnerability, CVE-2017-11882, related to Microsoft Equation Editor. This exploit is designed to achieve client-side code execution.

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_off0000010a.bin
8d1515e81f526854dba4205c07254e5b42e1f184c026dec2607a90444b8f9e07		 rtf-objdata-decoded RTF \objdata at offset 0x10A 3631 bytes

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