RTF malware analysis — malicious · ea7e98eb93a1f648

MALICIOUS

RTF

5.6 KB First seen: 2022-10-18

MD5: 7410218d86e953ca0203b3aa530f6b65 SHA-1: 69f96858954adaa1a386e9acf0dcb678c8b7f266 SHA-256: ea7e98eb93a1f648a0ed4617cbeb6ca5a7e2650bb2ed1079aef7851cfca9e639

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains OLE object data and specifically triggers the Equation Editor vulnerability. This indicates an attempt to exploit a known flaw in the Equation Editor component to achieve arbitrary code execution. The embedded OLE object is likely a payload designed to be run by the exploit.

Heuristics 3

Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITOR

RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
\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_off00000074.bin` `715a5c709c009f576cc915823f7217519a9c1a2fe2631bf65e4ec93cfe0922aa`	rtf-objdata-decoded	RTF \objdata at offset 0x74	2509 bytes

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