RTF malware analysis — malicious · 536166859cb8277e

MALICIOUS

RTF

3.1 KB First seen: 2022-10-07

MD5: 5a6f53d59b7871783d802e54557b67d7 SHA-1: 28852ab880c5162224255c72afcf7caf0014b6c7 SHA-256: 536166859cb8277e2d1e1cd7269d26b564919243e8af32e9490fd4a9982a7ce8

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1559.002 Component Object Model Hijacking

The RTF file contains an embedded OLE object with a split Equation Editor ProgID, indicating exploitation of the Equation Editor vulnerability. The \objupdate directive forces OLE activation, leading to arbitrary code execution. No document body text was available for further analysis, but the heuristics strongly suggest a classic Equation Editor 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_off00000077.bin` `bbac0b82a0eb741002ef83e6164743b8d986b7b35372effb18c7015a77e6d2fd`	rtf-objdata-decoded	RTF \objdata at offset 0x77	1499 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.