RTF malware analysis — malicious · 80129fee40e59865

MALICIOUS

RTF

95.1 KB First seen: 2024-07-30

MD5: c1770981e03dda36b16f52acb050e99a SHA-1: 4364d1139325be7c774789cddb955c5a1c802d85 SHA-256: 80129fee40e59865743b9070328bc42c237aeb4c8162cc9ca9f87755c68e9356

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains embedded OLE object data and triggers an objupdate event, indicating an attempt to exploit the Equation Editor vulnerability (CVE-2017-11882). This exploit is commonly used to deliver secondary payloads. The presence of the `RTF_EQUATION_EDITOR` and `RTF_OBJUPDATE` heuristics strongly suggests this attack vector.

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_off0000076c.bin` `3055cab7ce3a29923eee96b3125d2646456f7007dcf4b73aeb66e89103f1d1d5`	rtf-objdata-decoded	RTF \objdata at offset 0x76C	2121 bytes

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