Office (OLE) / .XLS malware analysis — malicious · 2f287d8ecc4c91bb

MALICIOUS

Office (OLE) / .XLS

162.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-04-17

MD5: f67be54e5d6c16c1a70a7e565aa30d12 SHA-1: bc7c829855464c010048375d80f6db0ff07d8f2b SHA-256: 2f287d8ecc4c91bb0af8a9e5c2aa7cf000ab66668904d6ed999a2a82f62d2276

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 presence of a known Equation Editor vulnerability exploit. This technique is commonly used to deliver a secondary payload, likely executed via PowerShell given the heuristic details. The exploit targets the Equation Editor OLE object within the Excel file.

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` `ad879707eee60155c2abb391352b18fce3de26b14d5bcf389141e33ca9722121`	ole-package	OLE Ole10Native stream: MBD003E35F1/oLe10NativE	1691 bytes

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