Office (OLE) / .DOC malware analysis — malicious · 283173aa97258e59

MALICIOUS

Office (OLE) / .DOC

1.95 MB First seen: 2022-09-19

MD5: c2ee0cf5e7b555185fb0c853225eda28 SHA-1: e4ec632bb19860f6f1be5b4064dafda8beaa4240 SHA-256: 283173aa97258e59073f2ead5ed79f1bcac0b77b0cdd959f524173c33222e062

102 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1559 Component Object Model Hijacking T1559.001 Component Object Model Hijacking: Component Object Model Hijacking

The sample is a malicious Microsoft Office document containing an embedded Equation Editor object. Static analysis identified a critical heuristic firing for CVE-2017-11882, indicating the exploitation of a known vulnerability in the Equation Editor component. This vulnerability is commonly used to deliver second-stage payloads.

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` `ecc80ec4c9e3bbd3a8a5d764e89b0c260f4304ab856a88ccc742e9a02dfb28d8`	ole-package	OLE Ole10Native stream: oLE10NaTivE	2029082 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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