Office (OLE) / .DOC malware analysis — malicious · 023f0d1cf5dd8d36

MALICIOUS

Office (OLE) / .DOC

1.93 MB First seen: 2022-08-18

MD5: 971af644ca008bc9500e3cde6a6bd3cf SHA-1: db0f36d95dbbbceb82d4219004e053285c7edc05 SHA-256: 023f0d1cf5dd8d3666f8f8cc51b80c58dfc2a202020b485334aa60efa5e02ea2

102 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1559 Component Object Model Hijacking T1559.001 Component Object Model Hijacking: Component Object Model Hijacking

The sample contains an OLE object that is a known exploit for CVE-2017-11882, targeting the Equation Editor. This vulnerability allows for arbitrary code execution when the object is processed. The embedded artifact 'ole10native_00.bin' is the payload associated with this exploit. The document body is heavily corrupted and does not provide further context on the intended 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` `ad2751e3ce02c3304dfa1852842a1a313a16ed9b4557247c337c1166ac5b4aa4`	ole-package	OLE Ole10Native stream: Ole10Native	2009400 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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