Malicious RTF — malware analysis report

Static analysis result for SHA-256 104307e688fe5349…

MALICIOUS

RTF

55.6 KB Created: 2017-04-19 17:31:00 First seen: 2017-09-14
MD5: 00c57378a505d1296fb36b686c604ec7 SHA-1: a5c039e9e4756dd5ceed1993c18deac354e21f4c SHA-256: 104307e688fe5349b961b445386400664287c1a088310990f599f83c51387ddc
282 Risk Score

Malware Insights

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

The RTF document exploits CVE-2017-0199 via OLE object activation to download a second-stage RTF file from http://10.10.181.87/ms2.rtf. This indicates a likely initial access vector via spearphishing attachment, leading to client-side exploitation.

Heuristics 7

  • 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.
  • 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: Rtf.Exploit.CVE_2017_0199-6335035-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_0199-6335035-0
  • 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://10.10.181.87/ms2.rtf 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_off00002c87.bin rtf-objdata-decoded RTF \objdata at offset 0x2C87 2601 bytes
SHA-256: 122c7fecf1b3a39014fd97690ff87c5426ef86cb7835c0b80e4d8b94ab5d9c1e

Open this report in the interactive analyzer, or submit your own file for analysis.