Malicious RTF — malware analysis report

Static analysis result for SHA-256 3e25e83a9d040aa0…

MALICIOUS

RTF

53.3 KB
MD5: 00ff75570b2a955829edfd2dcaa451e0 SHA-1: 9c4f522b196ebb3ebdfc5a663fcd2d1f2ce77b83 SHA-256: 3e25e83a9d040aa02cfb46d99695e2657c0e6324635291a762202e1c18c4e95e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is an RTF document containing an embedded OLE object. Static analysis detected critical heuristics indicating the presence of the CVE-2017-11882 vulnerability within the Equation Editor object. This vulnerability allows for arbitrary code execution when the document is opened, 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_off0000011c.bin
983b35a4182ab7bda93254945b5e6a715a3ead45b3407957bbb1c7cadc98b265		 rtf-objdata-decoded RTF \objdata at offset 0x11C 3631 bytes

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