Malicious RTF — malware analysis report

Static analysis result for SHA-256 954b8dadecd9aae4…

MALICIOUS

RTF

55.7 KB
MD5: fa10c7e3c25bc62a0746cd72c26fbed4 SHA-1: 36eb19ffa795ea11bbb6588d93edd575543ef4f8 SHA-256: 954b8dadecd9aae43b3b7817c30f9e303544fba49ba358d612e8f8f8af60d2b2
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 triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution when the document is opened. The exploit is 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_off00000111.bin
175e6f17eb971b24366be0049bc22b35cc8e837138d163fd26ce3697c44bc514		 rtf-objdata-decoded RTF \objdata at offset 0x111 3631 bytes

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