Office (OLE) / .XLS malware analysis — malicious · 8a7d1fbcf94d9893

MALICIOUS

Office (OLE) / .XLS

999.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-02-23

MD5: 97b9e5a042f1e7a2bfde4d4fe73c49e4 SHA-1: 321cbbce23997d77e71cede025c8e30044d82784 SHA-256: 8a7d1fbcf94d9893fdf8cfc28525dd77c328d4c9e24486b3bed38c12a151f878

150 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample contains an embedded Equation Editor OLE object that is known to be exploitable via CVE-2017-11882. This vulnerability allows for arbitrary code execution when the document is opened. No VBA macros were found to contain executable statements, but the presence of the vulnerable OLE object is sufficient for exploitation.

Heuristics 5

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.
x86 GetPC stub (CALL $+5; POP EBX) high SC_GETPC_CALL

x86 GetPC stub (CALL $+5; POP EBX)
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` `4d9d58615af245da1c0ab080fe57639d3872ac4c111604dae5085464eaf579bb`	ole-package	OLE Ole10Native stream: MBD0011B089/OLE10NATIve	1577 bytes

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