Malicious RTF — malware analysis report

Static analysis result for SHA-256 76a186dadd691748…

MALICIOUS

RTF

22.2 KB
MD5: f8ec9ff402803832d5d92ceb0e00c133 SHA-1: 88350fe7dcf539056560ac4d9434f236048894b8 SHA-256: 76a186dadd691748e577dd75d5d5b9531f4168138e5d95edbb563acfe9da44d7
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 in the Equation Editor component, likely leading to arbitrary code execution. No specific family could be identified from the available evidence.

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_off000017ad.bin
659eb97be2adff0a6a7293495400c058c9b17b95ab0b2cc7e84ea5ba46c60473		 rtf-objdata-decoded RTF \objdata at offset 0x17AD 3675 bytes

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