Malicious RTF — malware analysis report

Static analysis result for SHA-256 cc95c6df44bc6476…

MALICIOUS

RTF

8.2 KB First seen: 2020-02-04
MD5: e8938fea1a11ba24ac0c91b769f4e12c SHA-1: fabbd2355f1b86cae584811edfee5786cf979789 SHA-256: cc95c6df44bc647616587e33e0efe2ae51a7e1901f13af724f0241c4fbd9eb23
120 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object, specifically identified as an Equation Editor component. The presence of RTF_EQUATION_EDITOR and RTF_OBJUPDATE heuristics indicates that the file is designed to exploit a vulnerability within the Equation Editor to achieve code execution. No further IOCs were extracted from the provided evidence.

Heuristics 3

  • Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000032.bin rtf-objdata-decoded RTF \objdata at offset 0x32 4159 bytes
SHA-256: fa208df3fa50df5b420d825ebc922fb5966135e2eb936f2090fa4827419f53ee

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