Office (OLE) / .XLS malware analysis — malicious · ecadc50aa71d2111

MALICIOUS

Office (OLE) / .XLS

3.60 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-14

MD5: 2edf6a13e2eb9a5e7029e0d03c3b2109 SHA-1: 5f793e9951d6669aca47bd3af4087d60eec03745 SHA-256: ecadc50aa71d2111d1fee815cb23c32178b52c6d476a787fbf00a40ece95e027

110 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1559 Component Object Model Hijacking T1559.001 Component Object Model Hijacking: Component Object Model Hijacking

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates that this file exploits a vulnerability in the Equation Editor component of Microsoft Office. The presence of an OLE object containing an Equation Editor payload strongly suggests this exploit is used for initial payload delivery. No VBA macros were found to be executable, and the document body was not parsable.

Heuristics 4

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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

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` `5d47a314228c52df3d9d2c9e328e4e4f3177548db4c9396cfb56ab3795e307d1`	ole-package	OLE Ole10Native stream: MBD012BE66C/OLe10naTiVE	3229176 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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