Office (OLE) / .DOC malware analysis — malicious · 998b7d4b763d3e8a

MALICIOUS

Office (OLE) / .DOC

867.0 KB First seen: 2022-08-29

MD5: 359a778d52c51fb8773e49501c416bc9 SHA-1: b08e50f3d1df9108418a3142f9ef6d4e2e261ef5 SHA-256: 998b7d4b763d3e8aa0b9611a704a5731ca7dc36c684b8268903ff5788d92c165

100 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 vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload. The presence of an OLE object containing the 'Ole10Native' structure strongly supports this attack vector.

Heuristics 2

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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ole10native_00.bin` `fb862b8812fe8bb0a8752a059d2d36bde830a9092d96b920df0a8f412e48637d`	ole-package	OLE Ole10Native stream: oLE10natIVe	878365 bytes

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