Malicious RTF — malware analysis report

Static analysis result for SHA-256 ad47ec2aacfea190…

MALICIOUS

RTF

5.6 KB First seen: 2017-09-14
MD5: 605e64c12a4eacc43dc1591f3a5643cc SHA-1: ed0f9558cec63ac6f3b84b7b6aecbace61260f84 SHA-256: ad47ec2aacfea190a5e438d89d8467207e21b3e695268a9db47428c2fbb5e4fb
222 Risk Score

Malware Insights

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

The RTF file contains an OLE object with automatic linking and update flags, indicating an attempt to fetch external content. Specifically, the CVE-2017-0199 exploit is detected, targeting the URL http://hairind.com/image/test/logo.php for payload delivery. This exploit is commonly used to download and execute malicious second-stage content.

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://hairind.com/image/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: c2e5110439f5b80810173ff791dcf85ab239e74dc8519970a53c6dd6e11fe06d

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