Malicious RTF — malware analysis report

Static analysis result for SHA-256 270922d35e41b447…

MALICIOUS

RTF

5.5 KB Authoring application: Riched20 10.0.10240 First seen: 2017-10-10
MD5: f81f2d0d938da042f7c0b467a3c7602f SHA-1: 9249957274dcfe434cd08f5016807996235e70a7 SHA-256: 270922d35e41b44755e3183986d5bda2e2b6be0ec2beb21461eb9d068b21634f
222 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that is automatically linked and updated, exploiting CVE-2017-0199. This exploit is designed to download and execute a payload from the specified URL. The embedded URL points to a HTA file, indicating a likely execution of a script.

Heuristics 6

  • 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.
  • \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://10.132.82.125:8099/logo.hta In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000000d8.bin rtf-objdata-decoded RTF \objdata at offset 0xD8 2601 bytes
SHA-256: 203e6d69b519f96bc02cbd2e1ed7027263c1856ef368d26a086b484800230f3a

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