Malicious RTF — malware analysis report

Static analysis result for SHA-256 0bf3a23651c48a6c…

MALICIOUS

RTF

55.7 KB
MD5: 2825c65ad776e4744dfae198f29a693d SHA-1: 72183311663a94a0e4f9bf174cad821c53307a08 SHA-256: 0bf3a23651c48a6cf28e4f3ee7fb7bdce2f15dadb10d55c681e36b577b68996f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an RTF document that contains an embedded OLE object. Static analysis identified critical heuristics indicating the presence of the CVE-2017-11882 vulnerability, which is a known exploit targeting Microsoft 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
c8554ee81d8ecc98c6f4c353289c1d258414e34aebb6f5ae83a1fe6ec95890d0		 rtf-objdata-decoded RTF \objdata at offset 0x10C 3631 bytes

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