Office (OLE) / .DOC malware analysis — malicious · cc20488d99ddf618

MALICIOUS

Office (OLE) / .DOC

1.82 MB First seen: 2022-08-08

MD5: 513e9dab6f168b468e8f8f6d42bbe07a SHA-1: 19274eb26cd6a6757459bfa39990d1d7d242a588 SHA-256: cc20488d99ddf618b91898bec3276303924cdd3ecdf3394ef97fce6e50709034

102 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in Microsoft Equation Editor. This technique is commonly used to execute arbitrary code, often as a precursor to downloading and running a secondary payload. The presence of a high-entropy carved artifact further supports the malicious nature of the embedded object.

Heuristics 3

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.
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` `63d71b9c4a1c4cd3d9a1cecd4fbe52d54b18eb52e5df964ab67d0baadb8aa0d7`	ole-package	OLE Ole10Native stream: olE10naTiVE	1888275 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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