Office (OLE) / .DOC malware analysis — malicious · f517fa5a57e9b8a4

MALICIOUS

Office (OLE) / .DOC

1.55 MB First seen: 2022-07-17

MD5: b15df464a7bda76a6458ced95f60bd69 SHA-1: 91737ed0a69ca8c7d106b578d28db56a08b55daf SHA-256: f517fa5a57e9b8a490a2a98639676ef9a4b224f2baa818c8c484309fe3471799

142 Risk Score

Malware Insights

MITRE ATT&CK

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

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in Microsoft Equation Editor. The presence of an OLE object containing a payload further supports this. The heuristic SE_PASSWORD_ARCHIVE_LURE suggests a common tactic of using password-protected archives to bypass gateway scanning, implying this document is a dropper for a subsequent stage.

Heuristics 4

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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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` `d84dabd4ccc3980ad45f1be16fdc8418681a042b4a7c50b7aa5417216fb56198`	ole-package	OLE Ole10Native stream: Ole10Native	1613459 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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