Malicious RTF — malware analysis report

Static analysis result for SHA-256 92602f6a6e311d38…

MALICIOUS

RTF

80.8 KB
MD5: ee40a2aaf7a0338ba6d70fc6bf952ecb SHA-1: bc98ba443aebe9636897c3a2afd3b5772fa5286f SHA-256: 92602f6a6e311d38b66d738683413ebce97e64bb76bf7cb49d1cd7536066472d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a critical vulnerability, CVE-2017-11882, in the Equation Editor. This exploit allows for arbitrary code execution on the victim's machine. No further stages or specific family indicators were identified.

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_off0000235e.bin
3b271bda1abeef75c90cf5920c914655b541df48706cd59e978ee017644d0068		 rtf-objdata-decoded RTF \objdata at offset 0x235E 3631 bytes

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