RTF malware analysis — malicious · 76ec2731c048ffb0

MALICIOUS

RTF

5.6 KB First seen: 2018-11-13

MD5: 538a7274665665958f0e9b0d09aad78b SHA-1: 3d9cdaf37e102510ae141a9e128d2780652949d4 SHA-256: 76ec2731c048ffb09f682aff886216912858afc098be01800d88d385385d0c59

222 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an OLE object that is automatically linked and updated, exploiting CVE-2017-0199. This exploit is designed to download and execute a secondary payload from the embedded URL http://192.168.0.107:8080/default.hta. The ClamAV detection further confirms the malicious nature of this exploit.

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://192.168.0.107:8080/default.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_off000001b4.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1B4	2601 bytes
SHA-256: `d76277cbe2097cc788b6c995cbadddc16d70ef9d67edf863e87b10c3a061aead`

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