Office (OLE) / .XLS malware analysis — malicious · 783db23030e9a7d5

MALICIOUS

Office (OLE) / .XLS

204.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-10-19

MD5: 65ec6ca6f6cc01aad92bced714a693e9 SHA-1: 22dfdc57b144e94793b8dbf94d75ea4d683334c5 SHA-256: 783db23030e9a7d5759b7548d2ba8f47c6956c940034d6c285cdbfa619fc3ecc

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical heuristic firing indicates the presence of a payload associated with CVE-2017-11882 within an Equation Editor OLE object. This exploit is commonly used to achieve arbitrary code execution when the document is opened. The file's structure and the specific heuristic strongly suggest exploitation of this vulnerability.

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` `ede09ab6fd99bc8d2d97c208c98e584e8640eed52257a2131aa6b96ee23a5965`	ole-package	OLE Ole10Native stream: MBD0449922B/OLe10NATiVE	1448 bytes

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