Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 353e52c2871cb9c0…

MALICIOUS

RTF / .DOC

35.2 KB
MD5: 8c085cdea9d7ebac321bb25bcaddc37d SHA-1: 7e6f81744d2671908b9a59a5484cb124ce223813 SHA-256: 353e52c2871cb9c0c2b0ecff4fe89d530072f8a6b4b915618495c90a8661a27e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Phishing: Spearphishing Attachment

The RTF file contains embedded OLE objects, specifically triggering heuristics related to Equation Editor and OLE object activation. This strongly suggests exploitation of a known vulnerability within the Equation Editor component to achieve arbitrary code execution upon opening the document.

Heuristics 4

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • 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
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000159a.bin
42df40e3570c6cdea892b73294b3c39a1a8367037d5d8e0ab7cf5c73e3f43fbc		 rtf-objdata-decoded RTF \objdata at offset 0x159A 4178 bytes

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