RTF malware analysis — malicious · 4a41cd711df596db

MALICIOUS

RTF

8.2 KB First seen: 2018-10-19

MD5: 7661ec2e89f188e6fcc522f76a3b691e SHA-1: 1ddd17909dcc6694c272299fac14e49e454293c1 SHA-256: 4a41cd711df596db772f4301d7365bd4c80ed50e7db9df2dad8b204ccce59fdf

220 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers an exploit targeting CVE-2017-11882, a known vulnerability in Microsoft Equation Editor. This exploit allows for the execution of arbitrary code on the victim's machine. No specific malware family could be identified, and no further IOCs were extracted.

Heuristics 5

Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000003f.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3F	4151 bytes
SHA-256: `45f571ecdd97cc398580303ebeeb61d88a192addfae1ab8173a7408243a5f47f`

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