Malicious RTF — malware analysis report

Static analysis result for SHA-256 4a522813d7f7b59b…

MALICIOUS

RTF

70.9 KB
MD5: 2bb5e296cddbc7edc59b447529fe23e6 SHA-1: 1ca5adc5efa851ca92767b81ceebe26504940da1 SHA-256: 4a522813d7f7b59ba594429e1fcba686d21d15d4dc2b7736afce4f0f86031971
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an RTF document containing an embedded OLE object. Static analysis detected 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 when the document is opened.

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_off0000010b.bin
052e95634c8127b1ae0e6df49563570b2bed36f140ffda64f443dd4484b06aaa		 rtf-objdata-decoded RTF \objdata at offset 0x10B 3631 bytes

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