Malicious RTF — malware analysis report

Static analysis result for SHA-256 a2cc8e0cbfc32f6b…

MALICIOUS

RTF

5.6 KB First seen: 2017-09-14
MD5: a810a276b9368b67c2bb6f3b21759c7f SHA-1: ebf3805f559384ac824def8d8fce1b53bf53c4a2 SHA-256: a2cc8e0cbfc32f6b02ff681f89ef627fdb7da429638fe063fbbde891e0b6b240
222 Risk Score

Malware Insights

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

The RTF file contains an OLE object that is automatically linked and updated, indicating an attempt to activate remote content. The critical heuristic firing for CVE-2017-0199 confirms exploitation of this vulnerability, targeting the URL http://dnoymuzik.com/wp-content/test/logo.php. This suggests the file is designed to download and execute a secondary malicious payload from the specified URL.

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: 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://dnoymuzik.com/wp-content/test/logo.php 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: 243f528533b6c00ad89dfca6cb966b010fe2ce299a1fa5e106da2a9b7e3d87a0

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