Malicious RTF — malware analysis report

Static analysis result for SHA-256 631f6769332fda0f…

MALICIOUS

RTF

5.2 KB First seen: 2017-12-24
MD5: 9d0de05d631a878f4c1777bf2b8c4cb1 SHA-1: 7df1251bc1edb92ba67687893ee67ee1086cfb76 SHA-256: 631f6769332fda0f94b65bbd312de4904bc3abbb7afc32bfc3bf0b3e470c3a4c
162 Risk Score

Malware Insights

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

The RTF file contains a weaponized URL exploiting CVE-2017-0199, which is a critical vulnerability allowing for remote code execution. The embedded URL, http://www.al-enayah.com/ssfm/anna.hta, is likely used to download and execute a secondary payload. The presence of OLE object data and automatic linking further supports the exploitation of this vulnerability.

Heuristics 5

  • 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.
  • \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://www.al-enayah.com/ssfm/anna.hta In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000003f.bin rtf-objdata-decoded RTF \objdata at offset 0x3F 2604 bytes
SHA-256: 4dcca2ac277a61a86c850cdf1331802f8d795412ff4f8cf89ff3359c87460ef9

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