Office (OLE) / .DOC malware analysis — malicious · 032391318f1cb249

MALICIOUS

Office (OLE) / .DOC

1.54 MB First seen: 2022-11-21

MD5: 520bfcbef6d1713cbd7b94c0a2c6929c SHA-1: 5989e3ad51c504ff581de424a03b6d5d9cc2b395 SHA-256: 032391318f1cb2491337b75d02e06a4d7a3508c4bae6277fef58bf47524860d0

102 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1559.001 Component Object Model and Distributed Component Object Model

The sample is a Microsoft Word document containing a malicious Equation Editor object. Static analysis identified a critical heuristic firing for CVE-2017-11882, indicating exploitation of this known vulnerability. The embedded OLE object likely contains a second-stage payload, which is a common delivery mechanism for this exploit.

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` `093c58660d993a39f017e546faa2710b637f951a488e78c9291b3a007a9216e1`	ole-package	OLE Ole10Native stream: oLe10nATIVE	1597888 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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