Malicious RTF — malware analysis report

Static analysis result for SHA-256 337a9e6db0aa3bb7…

MALICIOUS

RTF

37.2 KB Created: 2017-11-27 05:09:00 First seen: 2017-12-08
MD5: e99c2b6da594f4af692a4e9d2637c05b SHA-1: cca9ab6db61be375c4ea548a6fab91b2785f98d7 SHA-256: 337a9e6db0aa3bb7e5a8ccbf0e58bd2bccae1fd3ee9f7bb2f629992a8f6478fa
122 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an OLE object that exploits CVE-2017-0199, a known vulnerability for client execution. This exploit is configured to download and execute a second-stage payload from the URL http://www.al-enayah.com/ssfm/fbet.hta. The specific family could not be determined, but the exploit and payload delivery mechanism are clear.

Heuristics 4

  • CVE-2017-0199 (OLE2Link / weaponized URL) critical CVE exact CVE_2017_0199_WEAPONIZED_URL
    RTF contains a URL Moniker OLE link to a script/HTA/template-style remote loader, matching the tighter static CVE-2017-0199 shape.
  • 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.
  • 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://www.al-enayah.com/ssfm/fbet.hta 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_off000026d9.bin rtf-objdata-decoded RTF \objdata at offset 0x26D9 3640 bytes
SHA-256: 0cfaa492cfa0b8972b081557756cf0ab46b1261609dfd7ee5240378085278a4a

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