Office (OLE) / .XLS malware analysis — malicious · d688e37de999f164

MALICIOUS

Office (OLE) / .XLS

152.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-10-25

MD5: b99df40dde85ab1824f89e8a5fbd14b3 SHA-1: 885f04d2cb924bcd883ff93bf44460d035c0371d SHA-256: d688e37de999f16478d723616c16b19311f01bea844b17970be30ad2fc3209ff

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1559.001 Component Object Model Hijacking

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE directly indicates exploitation of this vulnerability. The presence of an Equation Editor OLE object further supports this finding. The file likely leverages this exploit to execute a secondary payload, though the specific nature of that payload cannot be determined from the provided evidence.

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` `9f4b8fc43112177b2c372b7da741ed1a3ec7f62641e6bbf084b7bc48dbd8014d`	ole-package	OLE Ole10Native stream: MBD019859E3/Ole10naTive	1536 bytes

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