Office (OLE) / .DOC malware analysis — malicious · f542243f795c5234

MALICIOUS

Office (OLE) / .DOC

1.73 MB First seen: 2022-11-23

MD5: 6ff2ede45e92b3cb7eae8fcb0752987b SHA-1: e4bc696948926b9c5a1006ffbf5a9d42c180c7da SHA-256: f542243f795c5234505fd4f1922ddf8a69b3569c6cd698b61510c91aab900d35

142 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1559.001 Component Object Model Hijacking

The sample contains an embedded Equation Editor OLE object that is known to be vulnerable to CVE-2017-11882. This vulnerability allows for arbitrary code execution when the object is processed. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may also be attempting to trick the user into opening a password-protected archive, which is a common delivery method for malware.

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` `0f7288b2fdb5d7e37bf061e69f4c0d34b048c960286926311d88a3e5cc39ce72`	ole-package	OLE Ole10Native stream: oLE10NatIve	1798408 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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