Office (OLE) / .DOC malware analysis — malicious · 971e437245a257f2

MALICIOUS

Office (OLE) / .DOC

1.57 MB First seen: 2022-06-09

MD5: 677c333f1ce897fa88b2630ddb97b0e8 SHA-1: d2aabddc557008771834f819e39b1bee92ebd609 SHA-256: 971e437245a257f22b500b2f464e80b90128c4555c804bef4e49643c8da03ae0

102 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1559.001 Component Object Model Hijacking

The sample is a Microsoft Office document containing a malicious Equation Editor OLE object. Static analysis identified a critical heuristic firing for CVE-2017-11882, indicating the exploitation of this known vulnerability. The embedded artifact 'ole10native_00.bin' is the payload associated with this exploit. The document body is truncated and does not provide further context on the lure.

Heuristics 3

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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ole10native_00.bin` `3cad066e28e733a2c8b760f7fcb9efd1edc6a5fede490bd3899bfac2715ca8f0`	ole-package	OLE Ole10Native stream: Ole10NAtIVe	1633335 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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