RTF malware analysis — malicious · 1f1e269a0058b721

MALICIOUS

RTF

75.6 KB Created: 2017-07-15 02:42:00 First seen: 2018-03-04

MD5: c41a03ca070fa3d88ca5a6b12bc129a3 SHA-1: fdbc3f15f1b9ce650b0b1dded1bce6f274e35379 SHA-256: 1f1e269a0058b7219b0bb615bfd98e39eb3f0d097a681d88c22105c9dbd9481b

182 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. The exploit attempts to download and execute a HTA file from the URL http://192.168.37.128:8080/KYg8mmfe.hta, indicating a downloader or dropper functionality.

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://192.168.37.128:8080/KYg8mmfe.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.

Filename	Kind	Source	Size
`objdata_00_off00002b5a.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x2B5A	2601 bytes
SHA-256: `af8bc81dbba4a3c0c5650d5da05b6bef7e3f2a1c941ce7a3c9219d0a1cc88349`

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