Office (OLE) / .XLSX malware analysis — malicious · 9553ff81d26c5e4c

MALICIOUS

Office (OLE) / .XLSX

150.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-10-27

MD5: 3b1e086de549143cefa74cb681682645 SHA-1: 4e78c14dab0c82bb713ce9d6519f2e6148870885 SHA-256: 9553ff81d26c5e4c8ee10ea97162e5f66980b6e8e03cb998f3629aabfe5f3ac8

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE directly indicates exploitation of this known vulnerability. The presence of an Equation Editor OLE object further supports this finding. The file's purpose is to leverage this exploit to execute a payload, likely for further system compromise.

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` `34297040747d2bca8189fdaca626095e285d643c4de1140a36e5a4fad2c887b3`	ole-package	OLE Ole10Native stream: MBD01996156/oLe10NatiVe	1941 bytes

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