Malicious RTF — malware analysis report

Static analysis result for SHA-256 589f1046cd75f20e…

MALICIOUS

RTF

55.7 KB
MD5: 3c67d18622ec967999b2f95fb88f756f SHA-1: eea135c2872552b07a0c0190cfb5044b5bceb6f3 SHA-256: 589f1046cd75f20ece697d77159e13bcad5f7e46d9b47438988b6104fc064fc8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that exploits the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution when the document is opened, likely leading to the download and execution of 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_off00000113.bin
aa246a1698c5ced1dc5f1e06d10f2bc1dc69b439425d2a72d186671c243709e1		 rtf-objdata-decoded RTF \objdata at offset 0x113 3631 bytes

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