RTF malware analysis — malicious · 2830c2aec7bdb7e9

MALICIOUS

RTF

111.3 KB First seen: 2023-08-15

MD5: c95a1304a0b69d9e0c099f3bc6eedcca SHA-1: 7747eec83327a902d966b82507e511b43307991b SHA-256: 2830c2aec7bdb7e9090c79d6d95b422cbe875bd5a7ec1f55fb54a9165be1e48d

140 Risk Score

Malware Insights

MITRE ATT&CK

T1204 User Execution T1204.002 Malicious File

The RTF file contains an embedded OLE object with a split Equation Editor ProgID, and an \objupdate directive that forces OLE activation. The document body includes a lure instructing the user to 'Enable editing', which is a common technique to bypass macro security settings and trigger the exploit. The presence of these elements strongly suggests an attempt to exploit a vulnerability, likely related to the Equation Editor, to execute malicious code.

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
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00003834.bin` `921eb70f03ca3421c4437b8294931287074069c9b2b51f36656930b707de7faf`	rtf-objdata-decoded	RTF \objdata at offset 0x3834	1989 bytes

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