Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 e24165affc72f7de…

MALICIOUS

RTF / .DOC

5.2 KB
MD5: 55add7dbdef594759e7436184d26b837 SHA-1: e0be27939f072ee2e97e5c252d656b26c6c1398c SHA-256: e24165affc72f7decb1266efcaccd016480916723190de473a4ce528f7e35648
120 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The RTF file contains a critical heuristic firing for CVE-2017-0199, indicating it uses a remote URL moniker to fetch and execute a payload. The embedded OLE object data and the ".objupdate" directive further support this exploit. The primary IOC is the URL used for the second-stage download.

Heuristics 3

  • CVE-2017-0199 (OLE2Link / remote URL Moniker) critical CVE likely CVE_2017_0199
    RTF contains a URL Moniker OLE link whose decoded target is remote. Office can fetch and process the response through the CVE-2017-0199 OLE2Link attack path, but the server-side content type is not proven statically.
    URL https://oshi.at/BEhgqk
  • \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 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000036.bin
103c47488688c93769830638040d55103824a926da54dad75353a7834a1fc002		 rtf-objdata-decoded RTF \objdata at offset 0x36 2607 bytes

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