RTF malware analysis — malicious · 1202b3945fc4180d

MALICIOUS

RTF

13.8 KB First seen: 2023-02-16

MD5: a3abd638cccbba1a516aea8fd2d63371 SHA-1: 0e39f0b6c29d04a1aebb4d06a6394c44dec250bb SHA-256: 1202b3945fc4180dde14d70d30c462fceb63a997a39948890682860cb654bba0

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains OLE object data and specifically triggers heuristics related to Equation Editor exploitation and OLE object activation. This indicates the file is designed to exploit a vulnerability, likely CVE-2017-11882, to achieve code execution. The embedded OLE object, decoded from objdata, is the primary artifact used in this 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_off00001600.bin` `e99185c25490015aa49b6fb7ded86b746856cde48909018204d496dc35f43180`	rtf-objdata-decoded	RTF \objdata at offset 0x1600	1835 bytes

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