RTF malware analysis — malicious · 0233c43ce1cf759e

MALICIOUS

RTF

8.2 KB

MD5: a46b1c33dbf43642e984ec274b3d02a0 SHA-1: a2190789d601f874f7f35e63331e1b9e39b6459a SHA-256: 0233c43ce1cf759e1d8c8d343b03bfbad84652b12fe32b0e54b7fc7c08bdcc88

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains OLE object data and specifically triggers heuristics for the Equation Editor vulnerability and object activation. This indicates the file is designed to exploit a known vulnerability to execute code. While no scripts were directly extracted, the nature of the exploit suggests a payload download and execution.

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_off00000fa3.bin` `2e52e9ce381c4d9e613e6842619637136e9da46ed5f238d72b80a359db5fea25`	rtf-objdata-decoded	RTF \objdata at offset 0xFA3	1540 bytes

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