Office (OLE) / .DOC malware analysis — malicious · 0249b311d190556e

MALICIOUS

Office (OLE) / .DOC

1.55 MB First seen: 2022-06-15

MD5: 9390b13d5eeee481bf58be35d5d0edee SHA-1: 564249fba49595d07a4686a9b02dfae2c6c5ed4d SHA-256: 0249b311d190556eeb7410d5ec13f6d03befba0a20a1bd8223be6a233cf3bb3f

142 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

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, which is likely used to deliver a secondary payload. The presence of a password-protected archive lure suggests a multi-stage attack designed to bypass security controls.

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` `a1279b8e47c38bf232e376505ece081064ecb515107ce130ed0ed43ff0a1db93`	ole-package	OLE Ole10Native stream: ole10NAtIVE	1612062 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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