RTF malware analysis — malicious · c049635bfa837940

MALICIOUS

RTF

20.6 KB First seen: 2023-02-24

MD5: d7f6edced41efc6e538c07695b3da116 SHA-1: 1c9ca6812107401675a63534e278c3baa77f2008 SHA-256: c049635bfa8379404b0536994db0efd83e9cf0c91104853b2f6a19ef4fadfcb7

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains OLE object data and uses an \objupdate directive, indicating an attempt to exploit a vulnerability to activate embedded content. The presence of RTF_OLE10NATIVE_STREAM further confirms the embedding of an OLE object. This suggests the file is designed to deliver a secondary payload, likely through a downloaded executable, by leveraging these RTF-specific vulnerabilities.

Heuristics 3

Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM

RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
\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_off00000738.bin` `4722dfaf4f794d8cd3bd1a000de6add5fdb1606cb9c9d74a6a532a05475abb61`	rtf-objdata-decoded	RTF \objdata at offset 0x738	4187 bytes

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