Office (OLE) / .XLS malware analysis — malicious · 518f1f214fc69d86

MALICIOUS

Office (OLE) / .XLS

250.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-03-21

MD5: 7cc8d457164522d7e671165af6c24f6a SHA-1: 4d8d9375899f1925234a911d8b9c707e506eb758 SHA-256: 518f1f214fc69d862820e4b5453e52967a3cb42a08f04830270e1b29bda955b6

108 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the file contains a payload exploiting this specific vulnerability. The presence of an Equation Editor OLE object further supports this. No VBA macros were found to be executable, and the document body was heavily truncated and unreadable, suggesting the primary attack vector is the embedded exploit rather than social engineering via document content. The exploit likely leads to the execution of a second-stage 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` `eb5ec2638b677bab9f068d69363a56d01bc0e55650af221eff414a0be9bcfb56`	ole-package	OLE Ole10Native stream: MBD0031F517/oLE10nAtIve	1877 bytes

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