Malicious RTF — malware analysis report

Static analysis result for SHA-256 2a835df0d25ef24f…

MALICIOUS

RTF

56.4 KB
MD5: e4f7752151041f1e295ff80dfb767a61 SHA-1: 27af0a6ef24a18fd3a8e8dfb3b83a26b14b594a1 SHA-256: 2a835df0d25ef24f33d0c340058c88d880b628767942315b2d54c0583057d14c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that leverages a known vulnerability in Microsoft Equation Editor (CVE-2017-11882). This vulnerability allows for arbitrary code execution when the object is processed, indicating the file is designed to exploit this flaw for initial execution.

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_off0000010f.bin
3e2c38cee3ad90e86dd6aa8f5207c78be192d4652fa75e7ec88c429ab358d547		 rtf-objdata-decoded RTF \objdata at offset 0x10F 3631 bytes

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