RTF malware analysis — malicious · 87224f5e2ed579a0

MALICIOUS

RTF

41.9 KB First seen: 2023-07-26

MD5: 51dfac37926ca4687d0a84dd43f491ce SHA-1: f247fba3f30d5a6af74d2ce7aab25af65e1c9a20 SHA-256: 87224f5e2ed579a0b01bcb5468f6bd141061cfbec7ec519ab43871c49756ec21

140 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains an embedded OLE object and specifically targets the Equation Editor, a known vector for exploits. The 'SE_ENABLE_LURE' heuristic indicates the document prompts the user to enable editing, which is a common social engineering tactic to bypass security measures. The presence of the OLE object data suggests an attempt to execute malicious code or exploit a vulnerability upon activation.

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_off000054a7.bin` `1c00170c09f204865dfddc192ede3cf4c4caccb5f1e5aa12426104c470ea0e6b`	rtf-objdata-decoded	RTF \objdata at offset 0x54A7	1530 bytes

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