RTF malware analysis — malicious · 568d46f36717b803

MALICIOUS

RTF

30.6 KB First seen: 2024-06-06

MD5: 96094535fe4ae7ea46eb3df5e0b45231 SHA-1: 65b8bc134ad3032f36b29ba23be120190ac46c5a SHA-256: 568d46f36717b803624e6dc3e840a248b8e9744587e249dc6472713d7e831511

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object with a split Equation Editor ProgID, indicating exploitation of CVE-2017-11882. The \objupdate directive forces OLE activation, which triggers the exploit. The embedded object data is likely a shellcode payload designed to download and execute a second-stage malicious file.

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_off0000081d.bin` `899ae41f2df9703f66c7b625821321ca51a5148c6c109500bb657385b248d068`	rtf-objdata-decoded	RTF \objdata at offset 0x81D	1592 bytes

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