RTF malware analysis — malicious · bbc54188259e4636

MALICIOUS

RTF

85.2 KB First seen: 2024-08-13

MD5: 3bbf1f4c12640ec01a5b55c5adff7fe9 SHA-1: 32b68b6010dd8efce7a3397de39afc61cef6fbf0 SHA-256: bbc54188259e46363f7014000a591e0da5678e477fd48a94091f5adac435ed79

140 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.001 PowerShell

The RTF document contains OLE object data and specifically triggers heuristics related to Equation Editor exploitation and OLE object activation. This indicates the document is designed to exploit a vulnerability, likely CVE-2017-11882, to execute arbitrary code. The embedded OLE object data is the primary artifact, suggesting it's part of the exploit chain.

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
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00001382.bin` `0e40d6c634a1c4e37326b9488ab22e78bd63afcd66b15d3558aec12ddb536c13`	rtf-objdata-decoded	RTF \objdata at offset 0x1382	1744 bytes

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