Office (OLE) / .XLSX malware analysis — malicious · d181e2dd5f0635a2

MALICIOUS

Office (OLE) / .XLSX

215.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-10-31

MD5: 2dfbfc084b5ab7d8cae5829ca2cf8ac0 SHA-1: ce8a14997cf745320e59d57c770b499a368cd209 SHA-256: d181e2dd5f0635a2d2dcef1292a2e7e4b3a048e63ac3959382ac1f75aca38b6b

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 suggests the file is designed to execute arbitrary code upon opening, likely to download and run a secondary malicious payload. The presence of an OLE object further 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` `3b0f6b78164fa654b9f6ec86df89e01245b38fd985ada3f9e0b23aa8941a452b`	ole-package	OLE Ole10Native stream: MBD035D2040/OLE10NAtivE	1402 bytes

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