Office (OLE) / .XLS malware analysis — malicious · 6f73d6879f3f916f

MALICIOUS

Office (OLE) / .XLS

339.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-01-25

MD5: 6206f3ac6159ce7f8f632d8fb9ccbfaa SHA-1: d862bf89a8ed95704f6c05753de12f4c70504480 SHA-256: 6f73d6879f3f916f05780e0d90b538cf6d01b976f21620a716e268c672906827

110 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.005 Visual Basic

The sample is an Excel file containing a malicious Equation Editor OLE object. This object exploits the CVE-2017-11882 vulnerability to execute arbitrary code. No VBA macros were found to be executable, and no other scripts were extracted. The primary attack vector is the exploitation of the Equation Editor vulnerability.

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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.openxmlformats.org/drawingml/2006/main

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` `2bc8919261e232b85e1092059f1946b4a9d08c1f77e5ff6f397e9bd978e322bc`	ole-package	OLE Ole10Native stream: MBD0172D9D7/olE10NaTivE	1571 bytes

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