RTF malware analysis — malicious · 592c5d47b909ad9e

MALICIOUS

RTF

36.9 KB First seen: 2023-07-18

MD5: eae3a2b886252835382260e8e59469cd SHA-1: e4367d7b2ab6c119674c785f2f447a38e463ce00 SHA-256: 592c5d47b909ad9ece554b27fdb17cea5530da799af2bfd84bb3004a5710ca71

140 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059 Command and Scripting Interpreter

The RTF document contains an embedded OLE object with a split Equation Editor ProgID, indicating an attempt to exploit a known vulnerability. The document also contains a lure instructing the user to 'Enable editing', a common tactic to bypass security measures. The embedded OLE object, objdata_00_off0000506d.bin, is the primary artifact associated with the exploit.

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_off0000506d.bin` `4de210e2b052b4398142e6866e9ecf41101b6c804243b8d8d8cd7c84ffdbe572`	rtf-objdata-decoded	RTF \objdata at offset 0x506D	1259 bytes

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