RTF malware analysis — malicious · 30b948a3c93cf7e9

MALICIOUS

RTF

83.5 KB First seen: 2024-08-13

MD5: 36e32dbcca3f5c62542f9b67b7f3de77 SHA-1: 0b9bfeb337aadce0a6920f13b5fdfbc3c52b952d SHA-256: 30b948a3c93cf7e961e828766eb57fe98c0154a293ffa6b32721ff486fc392cf

120 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1566.001 Spearphishing Attachment

The RTF file contains embedded OLE object data and triggers an ".objupdate" command, indicating an attempt to exploit the Equation Editor vulnerability. This technique is commonly used to download and execute a second-stage payload, likely leading to further system compromise.

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_off00000df6.bin` `62ef3ef0bf12a6242868afe984ff36a4ae6f39c1b261635ed5a4c293f53937ac`	rtf-objdata-decoded	RTF \objdata at offset 0xDF6	1802 bytes

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