RTF malware analysis — malicious · 5961a204bb43bb63

MALICIOUS

RTF

99.9 KB First seen: 2024-08-01

MD5: 98fccb07a0d2a7658b6c42edb5eb1462 SHA-1: 24960decb2b636b08461ab65e35561944d0f0b02 SHA-256: 5961a204bb43bb63f2b98836a34afd1e16a6f3cb160fd17b4718b377273255ff

140 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1204.002 Malicious File

The sample is an RTF document containing an embedded OLE object, specifically targeting the Equation Editor vulnerability. The presence of `RTF_EQUATION_EDITOR` and `RTF_OBJUPDATE` heuristics indicates that the file is designed to exploit this vulnerability upon opening, likely to achieve code execution. The embedded OLE object data further supports this, suggesting it contains the malicious payload or instructions to download one.

Heuristics 4

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
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00001e0d.bin` `579ce361864e9895d8a883d52f19ce13b7b7d976e1e3857e3a47ee1533af51c0`	rtf-objdata-decoded	RTF \objdata at offset 0x1E0D	1998 bytes

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