Malicious RTF — malware analysis report

Static analysis result for SHA-256 881c64f64b37fa1c…

MALICIOUS

RTF

76.2 KB Created: 2017-11-27 21:44:00 First seen: 2017-12-08
MD5: a3319955f3b25f5efa4fa022efc62e8a SHA-1: 1dcc3833f05a68eee324300b01bfd01332f8418b SHA-256: 881c64f64b37fa1c79abbdacc460801dd417aa25a44efe3bf1e2b34438c02c64
182 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an OLE object with an automatically linked URL that exploits CVE-2017-0199. This exploit is designed to download and execute a second-stage payload, identified as an HTA file from the URL http://rgho.st/download/75CY65wHQ/f0450aca55eea69de1c33d9f7886028257603f8f/1.hta. The ClamAV detection further confirms the malicious nature of this exploit.

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.
  • 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.
  • 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://rgho.st/download/75CY65wHQ/f0450aca55eea69de1c33d9f7886028257603f8f/1.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_off00002a9d.bin rtf-objdata-decoded RTF \objdata at offset 0x2A9D 3113 bytes
SHA-256: 88a8a26a69acdbbbe8757cddb92d00268e3ffe9ba97fe2b4db65fdd9f5cf77c2

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