Malicious RTF — malware analysis report

Static analysis result for SHA-256 f55dff0d9eee663c…

MALICIOUS

RTF

68.6 KB
MD5: 8afeb8331dc9c9893fdb96008650d839 SHA-1: 5e9e12fcc5c0e86dfcde4ffacc5bd0b321047f33 SHA-256: f55dff0d9eee663cb77c9e05b07fef4b3e2fdae9d4cc62feff68a9ed18a4147d
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 CVE-2017-11882, a known vulnerability in Microsoft Equation Editor. This vulnerability is typically exploited to achieve arbitrary code execution on the victim's machine.

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_off0000010f.bin
7155e5b090aa61f0ad1936aea5b771b0d3dd70cdab91fef163d0e599e734acff		 rtf-objdata-decoded RTF \objdata at offset 0x10F 3631 bytes

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