RTF malware analysis — malicious · 8eeb2154a5c9403a

MALICIOUS

RTF

50.9 KB First seen: 2019-01-11

MD5: ae13464a278e23a21a855b7f31e6752d SHA-1: dc0233a4c3d8387427f76af9a1fb7a7269540efe SHA-256: 8eeb2154a5c9403a02bf2a01cde190e39eb6842863e5e21d4b07c31bf792d70e

182 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers the Equation Editor vulnerability (CVE-2017-11882). This vulnerability allows for arbitrary code execution when the object is activated. The ClamAV detection name directly indicates the exploit used. No document body or script content was available for further analysis.

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: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
\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://schemas.microsoft.com/office/word/2003/wordml In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000a988.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xA988	3625 bytes
SHA-256: `751a633bc9800f2d40574ab96620691f015f235e08e69894cb1295b250e10fc0`

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