RTF malware analysis — malicious · 3e178aa9b4ee544b

MALICIOUS

RTF

107.7 KB First seen: 2024-09-27

MD5: e28bc78bd1135a53fb673ce314b13db6 SHA-1: 9dc79c32f96e465a69e68c449acdc8fd1e61cea4 SHA-256: 3e178aa9b4ee544b7baa3c19741c42deef3671af17f14b4d8c2519330ca677e1

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.001 PowerShell

The RTF document contains OLE object data and specifically triggers the Equation Editor vulnerability, indicating exploitation for client execution. The embedded OLE object, objdata_00_off00002065.bin, is likely the initial stage of a payload delivery mechanism. Further analysis of the OLE object would be required to determine the exact nature of the second-stage payload and its associated MITRE ATT&CK techniques.

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_off00002065.bin` `5c84111ec79861d4af0a1de439916ee67f4afd7c24e4806d81f0bfa628954937`	rtf-objdata-decoded	RTF \objdata at offset 0x2065	2049 bytes

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