RTF malware analysis — malicious · fcb64da57f698c09

MALICIOUS

RTF

48.1 KB Created: 2017-08-03 14:17:00 First seen: 2017-08-08

MD5: b7fa1a7f64452a1d3a991666597cc5a7 SHA-1: 8a4552ba901a51af65f5aac3a03008edb76f69e8 SHA-256: fcb64da57f698c09ab05b2d8f85d1e1f5c44b9a6d7669af285b0f2dbf01a8a1e

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. This exploit is configured to download and execute a HTA file from the URL https://a.pomf.cat/nyxeve.hta. The embedded OLE object data was decoded, revealing the exploit mechanism.

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 https://a.pomf.cat/nyxeve.hta In RTF body
- http://schemas.microsoft.comIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00002984.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x2984	3760 bytes
SHA-256: `cd603d86d3858672eb59ffb5f5d1383030fac41e4305125e09e54fcdab2b1218`

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