Malicious RTF — malware analysis report

Static analysis result for SHA-256 75074c7966c39cb7…

MALICIOUS

RTF

82.7 KB
MD5: a3e2645cd2768f8161368c3e3fa758e7 SHA-1: 62f48cfd0c22e386903b8a61864f2e7a8db42809 SHA-256: 75074c7966c39cb797e8b737e3e200dff2aff293028f2f3776fbca1bd92d135d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a critical vulnerability, CVE-2017-11882, in the Equation Editor. This vulnerability allows for the execution of arbitrary code on the victim's machine, likely to download and run a secondary 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_off0000238d.bin
2acdd097c522f32af20529734f86f71b49d4304d75fbeb84c2539e9bfc82724f		 rtf-objdata-decoded RTF \objdata at offset 0x238D 3631 bytes

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