RTF malware analysis — malicious · 16447f7e27de8527

MALICIOUS

RTF

22.8 KB First seen: 2023-06-08

MD5: f5879c1be334d16e12d50db0fd3c233f SHA-1: 6993ec206a042739fc89d7c001a855e10f3946bd SHA-256: 16447f7e27de852783027404f8ccf368ecf8e1eadd47f8e080e6e4819d2203b0

160 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object with a CLSID indicative of the Equation Editor vulnerability. The \objupdate directive suggests that the object is designed to be activated automatically, leading to the exploitation of this vulnerability. This is a common method for delivering secondary payloads, such as malware downloaders.

Heuristics 4

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.
Equation Editor CLSID critical RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
\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_off00001296.bin` `26e3f56e027ab6f2172ae266f671954e8c5ec3dff6550ca7b3dda92c189f1141`	rtf-objdata-decoded	RTF \objdata at offset 0x1296	3665 bytes

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