Malicious RTF — malware analysis report

Static analysis result for SHA-256 066f323e5c08d890…

MALICIOUS

RTF

50.2 KB
MD5: 288a9309c699bbf4e6a67d711839fd54 SHA-1: 76d325c0462748dcdd8af022ffc03950e3a84d4b SHA-256: 066f323e5c08d890128ce2f4633c93e002c07e5832042042b8140b0b1afef541
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that leverages a known vulnerability in the Equation Editor (CVE-2017-11882). This vulnerability allows for the execution of arbitrary code upon opening the document, 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_off0000010a.bin
3294240f6657165f7d057dd38cbe3aa4ebd18e42575c4b99c3d34ab8b0f4549e		 rtf-objdata-decoded RTF \objdata at offset 0x10A 3631 bytes

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