Doc.Dropper.Agent-7160434-0 — RTF malware analysis

Static analysis result for SHA-256 2ba07a46d2e631ab…

MALICIOUS

RTF

5.6 KB First seen: 2017-10-10
MD5: e6b2db888fefeed069892ddbd3fe9033 SHA-1: 6f6637036b16b2b4f84b58ac87bd877dd249ee18 SHA-256: 2ba07a46d2e631ab2f1c8e03ab61c61d6618006a26ee03d983c3262ed5c38ce1
222 Risk Score

Malware Insights

Doc.Dropper.Agent-7160434-0 · confidence 95%

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

The RTF file contains an OLE object that exploits CVE-2017-0199, a known vulnerability for remote code execution. This exploit is configured to download a secondary payload from the URL http://999.999.999.999/logo.doc. The ClamAV detection name 'Doc.Dropper.Agent-7160434-0' further supports its role as a dropper.

Heuristics 6

  • 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.
  • ClamAV: Doc.Dropper.Agent-7160434-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-7160434-0
  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • \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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://999.999.999.999/logo.doc In RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000001a2.bin rtf-objdata-decoded RTF \objdata at offset 0x1A2 2601 bytes
SHA-256: 2fc33c396c80542311aa9e14a3188b9062217b86f0e3d7ab1835a50d15f8acad

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