Malicious RTF — malware analysis report

Static analysis result for SHA-256 5553ff538b7a2b85…

MALICIOUS

RTF

50.3 KB
MD5: dd634955455949edee5538f3ece1443f SHA-1: 15a87deb3c0c6a168730ba682c6e6c77cf002976 SHA-256: 5553ff538b7a2b85a38a49ca3cac5522d751123d2082a0b5079e2d0c6742b07d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that leverages a critical vulnerability in the Equation Editor (CVE-2017-11882). This exploit allows for arbitrary code execution, likely to download and run 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
c812c6ea55306cfeefeef68d449084fd30b824f1dd159c8098c58a227dcd2713		 rtf-objdata-decoded RTF \objdata at offset 0x113 3631 bytes

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