Malicious RTF — malware analysis report

Static analysis result for SHA-256 b67e99075d961745…

MALICIOUS

RTF

7.2 KB
MD5: 728b3ea762d0e5e2f464ae73fc343876 SHA-1: 6fbd9896c1eff8bf1ec5a848874d692baf1cb021 SHA-256: b67e99075d961745aec5721857b8bfc30fce7ccb4ea0f0048ab45f5409f327ad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a buffer overflow vulnerability in the Equation Editor (CVE-2017-11882). This vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload. No specific family could be identified from the available evidence.

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_off00000030.bin
325b94654b1be4937aa789d0dcebb4928e2384d9b82ff1afacc95f264a1c26ae		 rtf-objdata-decoded RTF \objdata at offset 0x30 3628 bytes

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