Office (OLE) / .XLSX malware analysis — malicious · 59c1ab21cdd58b8a

MALICIOUS

Office (OLE) / .XLSX

267.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-12-08

MD5: 6071443d52fc119af0d876a05c83dbba SHA-1: b97a01161c15e7462b13f5d65170c19984ecef0b SHA-256: 59c1ab21cdd58b8a8d9b4cdf0b8342a874863f16b5870e1db9dd2c1423e91aa8

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 achieve arbitrary code execution. The embedded OLE objects likely contain the exploit code and the initial payload.

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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ole10native_00.bin` `8da1fd67533d2dc2951225dbcbb6430c0a904547fae38d8b94529fe1b99d7c7c`	ole-package	OLE Ole10Native stream: MBD002831A9/Ole10Native	9830 bytes
`ole10native_01.bin` `45f657068376f276b7dda01e02d866e7cf3fdc7005aa897a5d8825fe12165aac`	ole-package	OLE Ole10Native stream: MBD002831AA/Ole10Native	9818 bytes
`ole10native_08.bin` `5739f3c5c8204c3ce53c15e01dbe0f3fbe715c6ff22355cc39cffd1af20cca41`	ole-package	OLE Ole10Native stream: MBD002831B1/oLE10NaTIVE	1673 bytes

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