Office (OLE) / .DOC malware analysis — malicious · 447ea7e3d49abb27

MALICIOUS

Office (OLE) / .DOC

1.36 MB First seen: 2022-10-26

MD5: c21b1340a7972c14ec13a81596b8bbfe SHA-1: 401894a865c82431ec62d389bef8a579b2423ab4 SHA-256: 447ea7e3d49abb27c4dca4d24e75255fe43e3f873cc7f8af3ff93feb0eef562c

142 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model T1204.002 Malicious File

The sample contains an embedded Equation Editor OLE object that is known to be vulnerable to CVE-2017-11882. This vulnerability allows for the execution of arbitrary code. The heuristic firings indicate that this object contains a payload, likely delivered as a password-protected archive lure, which is a common tactic to bypass security controls. The extracted artifact 'ole10native_00.bin' is the payload from the Equation Editor.

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` `3e04dddb7d6f89b0f5d30e15642711f7c34ca89d59276fa8352350fa09a3d7ec`	ole-package	OLE Ole10Native stream: Ole10Native	1413560 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.81, consistent with packed or encrypted content.

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