Office (OLE) / .DOC malware analysis — malicious · e26a254ffd5d43e6

MALICIOUS

Office (OLE) / .DOC

1.01 MB First seen: 2022-06-21

MD5: d0317747af0387db64f1d3d984bddd98 SHA-1: 977f0275b0dea53ca7f361868f966bd704f841fc SHA-256: e26a254ffd5d43e666f1c966e99d99fd5c65cd531184d7304797e051661d3553

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 used to exploit the CVE-2017-11882 vulnerability. This vulnerability allows for arbitrary code execution when the object is processed. The embedded object is a binary payload that likely contains the exploit code. The SHA256 hash of the sample is provided as a primary IOC.

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` `8bdd63e0f6e101f0421af760549a21ea2866b1038c1cd485b79592bcfdaba6d9`	ole-package	OLE Ole10Native stream: Ole10Native	1050606 bytes

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