Office (OLE) / .DOC malware analysis — malicious · 6d57f5dbc30d1c39

MALICIOUS

Office (OLE) / .DOC

1.46 MB First seen: 2022-07-17

MD5: d2e2fb011c0cd53938fc18cac1507320 SHA-1: b6751b76b0637e627f94df9d18d91d6990044ccd SHA-256: 6d57f5dbc30d1c39cd7fe9c6b15bf72faaa4490da90684000f670c42ecfca723

142 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample is a Microsoft Word document containing an embedded Equation Editor object. Static analysis detected the presence of CVE-2017-11882 within this object, indicating an exploit targeting a known vulnerability in Equation Editor to achieve code execution. The document also contains heuristics suggesting it is a lure for a password-protected archive, likely to bypass security scanning.

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` `e63f1328e3f01c5f05b60c1a0bc6e0b1b7cd43b3662e878af8ceeb5cac9afd72`	ole-package	OLE Ole10Native stream: Ole10Native	1515624 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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