Office (OLE) / .XLS malware analysis — malicious · 9d1689d8abadacc1

MALICIOUS

Office (OLE) / .XLS

1.04 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-02-08

MD5: 16f65a65c5308ad13f1f145044e15e5e SHA-1: 6b27042de64ae9becbb9bb8908dd856883a5e8cc SHA-256: 9d1689d8abadacc148c6f7c60ee0f45a82bd42a71d61a28c77262418dd23cee7

150 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.005 Visual Basic

The sample is an Excel file containing an embedded Equation Editor OLE object, which is a known vector for exploiting CVE-2017-11882. The VBA macros are present but appear to contain no executable statements, suggesting the primary malicious functionality is within the OLE object. This exploit typically delivers a second-stage payload.

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 ECX) high SC_GETPC_CALL

x86 GetPC stub (CALL $+5; POP ECX)
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` `307e2cb6fae13a0668205b55b120ab67c90d553bec991a5eac254748539fffda`	ole-package	OLE Ole10Native stream: MBD01AA0FB6/olE10nATiVe	1336 bytes

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