Office (OLE) / .XLSX malware analysis — malicious · 2325ea99a8f0621f

MALICIOUS

Office (OLE) / .XLSX

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

MD5: a5700b8fe4d9e1b781b4f049117530f3 SHA-1: 8dec1ab0bdfa6100b8ee5a5850e74083852ca7d2 SHA-256: 2325ea99a8f0621f073ca9c69ce8f35da1594a9b711387f876ef6a07899001d6

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 technique is commonly used to execute arbitrary code, leading to further compromise. The presence of an OLE object containing a native payload strongly suggests this exploit is the primary 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` `3cd897ca445e1fd6357b38d3082a1003990e0863e1d19d4e287b6f3a8e2e10a4`	ole-package	OLE Ole10Native stream: MBD01BB3ABE/Ole10NATIVe	1531 bytes

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