Office (OLE) / .DOC malware analysis — malicious · 72e0261539624f43

MALICIOUS

Office (OLE) / .DOC

1.02 MB First seen: 2022-10-29

MD5: b5a4df278aa73d83d0cc0f6d8ff88ea7 SHA-1: 49b2636c73e5dce194707c42dab905c1fa76b2fc SHA-256: 72e0261539624f43eb5cfbdad1b2c67120d723d90098cd39f4d574418838c6b7

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample contains an embedded Equation Editor OLE object that is known to be vulnerable to CVE-2017-11882. This vulnerability allows for the execution of arbitrary code when the object is processed. The embedded object is identified as an Ole10Native payload, confirming the exploit vector.

Heuristics 2

Equation Editor Ole10Native payload — CVE-2017-11882 critical CVE likely CVE_2017_11882_EQUATION_OLE10NATIVE

An embedded Microsoft Equation 3.0 object (CLSID 0002CE02-0000-0000-C000-000000000046) carries an Ole10Native packager stream instead of the normal Equation Native/MTEF data. This is the weaponized Equation Editor RCE delivery shape used by CVE-2017-11882 / CVE-2018-0802 maldocs. The payload (font-record overflow + shellcode) is frequently encrypted and the stream name case-scrambled to evade scanners, but an Equation object holding an Ole10Native stream has no benign use.
Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR

Contains Equation Editor object — related to CVE-2017-11882 / CVE-2018-0802 exploitation, but CLSID presence alone is not the malformed MTEF exploit primitive.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ole10native_00.bin` `5bb3797d63bd1de96d874a38594b77eca71842105be22152adccf4a960e65b13`	ole-package	OLE Ole10Native stream: OlE10NatIvE	1056637 bytes

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