Office (OLE) / .XLS malware analysis — malicious · 2d00f9db923b61dc

MALICIOUS

Office (OLE) / .XLS

471.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-03-13

MD5: 1e82a463c20b05f92b1d42b37a34d551 SHA-1: c84d3731e5c857ad6198652b20b3c009a6fec82a SHA-256: 2d00f9db923b61dca9542aee2298ef87639480b770b1af48c86b156e33388425

108 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.005 Visual Basic

The critical heuristic firing indicates the presence of a payload exploiting CVE-2017-11882 within an Equation Editor OLE object. While the VBA project contains no executable statements, the OLE object itself is the primary vector for exploitation. This suggests the file is designed to leverage this known vulnerability for initial execution, likely to download and run a secondary payload.

Heuristics 3

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.
VBA project contains no executable statements low OLE_VBA_MACROS

Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1206 bytes
`ole10native_00.bin` `ec76bd0c7f0dedfb5c39cf7a012cb881a1db34ab70d1d805ceee505eba6bf9aa`	ole-package	OLE Ole10Native stream: MBD00206944/olE10nATiVE	2388 bytes

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