Malicious RTF — malware analysis report

Static analysis result for SHA-256 dc57db14d2b78e25…

MALICIOUS

RTF

56.9 KB
MD5: fc94dbe1cca2d87c6255782e5949cd1f SHA-1: e60c5908c35967e9c32998f7835b903b1af5e28b SHA-256: dc57db14d2b78e25dc4c86c10d2875b807ba69b67983f490ad3b6d71e1256283
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Equation Editor. This vulnerability allows for the execution of arbitrary code, 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_off0000010c.bin
9d4fdf401d061313160dbb6b8351a61e214e0068250610bb4ab7d6e3668718b7		 rtf-objdata-decoded RTF \objdata at offset 0x10C 3631 bytes

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