Malicious RTF — malware analysis report

Static analysis result for SHA-256 87f803f1e9bc6d88…

MALICIOUS

RTF

53.9 KB
MD5: 82507698c40fbf706b87793ad4bc62b2 SHA-1: 7c9415d6f9920cbb219bb19e9c4b4fdc220d8d51 SHA-256: 87f803f1e9bc6d88c7cd5cc3199aaca4b5d95ad068dc7508ea2791e97f7b5488
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

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, leading to the execution of a malicious payload.

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_off00000114.bin
d7ff5e5b0d404fbf15cbfae3f59db4cecbfb6cb10ae75347ca34e90cbb67ec44		 rtf-objdata-decoded RTF \objdata at offset 0x114 3631 bytes

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