Rtf.Dropper.Agent-7702064-0 — RTF malware analysis

Static analysis result for SHA-256 e62d5dc98e500381…

MALICIOUS

RTF

1.84 MB Created: 2019-09-17 13:59:00 First seen: 2020-06-01
MD5: 2233d71bdf7388b60460f1517f03d82d SHA-1: 80adb23ec80c6aba64445d539650a8fde5dddc3c SHA-256: e62d5dc98e500381de355494282baae292a0a5e8530e3371146560d88357a695
202 Risk Score

Malware Insights

Rtf.Dropper.Agent-7702064-0 · confidence 95%

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

The RTF document contains embedded OLE object data and uses \objupdate to force OLE activation, exploiting CVE-2017-8759. This indicates the file is a dropper designed to execute a secondary payload. The ClamAV detection name further supports its classification as a dropper.

Heuristics 6

  • CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759
    RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
  • ClamAV: Rtf.Dropper.Agent-7702064-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Dropper.Agent-7702064-0
  • \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 OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • 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://schemas.microsoft.com/office/word/2003/wordml In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off001c183d.bin rtf-objdata-decoded RTF \objdata at offset 0x1C183D 1412 bytes
SHA-256: 1a078122c71e45b41605cd25ffc1649153009904e0b4b2eaa3e5257c2b658758

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