Office (OLE) / .DOC malware analysis — malicious · 5644ca85f090e4f1

MALICIOUS

Office (OLE) / .DOC

1.80 MB First seen: 2022-06-27

MD5: e72c95ec05c1e2d8785e7cac44e86c4a SHA-1: 32cf3a1bf8c786b8dcc3c2c372249b487d8b9d6f SHA-256: 5644ca85f090e4f11d558bedf8bfb28569d06868d4f4be1cb8de39d46f31cd49

102 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a Microsoft Office document containing a malicious Equation Editor OLE object. Static analysis identified the exploitation of CVE-2017-11882, which is a known vulnerability used to execute arbitrary code. The embedded 'ole10native_00.bin' artifact is the payload associated with 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` `7615e61ed58b7e0eb011fb416cfe157745a698eea58a40c05024abe68c99ab7b`	ole-package	OLE Ole10Native stream: olE10nATiVe	1869619 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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