Office (OLE) / .XLS malware analysis — malicious · 17fb6a097aa49ede

MALICIOUS

Office (OLE) / .XLS

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

MD5: a1dae5da8a5d7d8e720c598b73b46557 SHA-1: 342637ef8222bcd76048c64504522f5f3e120601 SHA-256: 17fb6a097aa49ede3d7a76a724de2a8454738f6c4fd4f93afdf01f6831d80ece

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, often leading to the download and execution of further malicious payloads. The presence of an OLE object containing this exploit is strong evidence of malicious intent.

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` `df4681f0a2bff1cb7223c684931e0c31e0e32b8721b7dd5023e1bac7e36538f8`	ole-package	OLE Ole10Native stream: MBD01A7A069/OLE10NatIVe	1291 bytes

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