RTF malware analysis — malicious · 449feb2dd2726dca

MALICIOUS

RTF

3.6 KB

MD5: 8e28af18260a040b02a8d0373099455a SHA-1: 959075f0b1d15f365c7fa3de48d76f1d0aa74642 SHA-256: 449feb2dd2726dca64f18010749b5a3a4db80422df5f6e3fdcc822443aec8270

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains embedded OLE objects and specifically triggers heuristics related to the Equation Editor vulnerability. This indicates an attempt to exploit a known vulnerability for client-side code execution. The presence of ".objupdate" further suggests an attempt to force the activation of the embedded OLE object, likely to trigger the exploit.

Heuristics 3

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 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000000d8.bin` `fbcfaf0e0187d2b8026129cf0801fde9a3c75942f95dbb837c48afcfc15ddb03`	rtf-objdata-decoded	RTF \objdata at offset 0xD8	1494 bytes

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