Malicious RTF — malware analysis report

Static analysis result for SHA-256 6eecc0c960006668…

MALICIOUS

RTF

70.4 KB
MD5: 40984bf3f7141a2d1216fc012ecaa71a SHA-1: 059790319481681320cec4a8a70a4f1a5870b3cf SHA-256: 6eecc0c960006668c5b12390e58621669e02c192fb1363d1e96652e34f7a7a21
160 Risk Score

Malware Insights

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

The RTF document contains an embedded OLE object that exploits the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution when the document is opened, likely leading to the download and execution of a secondary payload. The file is classified as malicious due to this exploit.

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_off0000010b.bin
adf51478d73a1a56868a66dfe950e6acc7f2af4f4e65f30840075d91ca31d6e0		 rtf-objdata-decoded RTF \objdata at offset 0x10B 3631 bytes

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