Office (OLE) / .XLS malware analysis — malicious · 010908bb38b8228d

MALICIOUS

Office (OLE) / .XLS

1.11 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-02-21

MD5: c22734d52380d07b58fd97b59930c4cf SHA-1: 53c41a2900b5ab6a3be6712993ef3d3d99c9dc65 SHA-256: 010908bb38b8228dea6d625bb4a0f637e892cff3843460a594f18090a4f6b248

150 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample is an Excel file containing an embedded Equation Editor object that exploits CVE-2017-11882. This vulnerability allows for arbitrary code execution when the document is opened. No VBA macros were found to be executable, and the document body is minimal, indicating the primary attack vector is the Equation Editor exploit.

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 EAX) high SC_GETPC_CALL

x86 GetPC stub (CALL $+5; POP EAX)
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` `0c726fe1cca801f652237cf0ed127fcd2eec2617af2dc5f26f180b58fe9a07e4`	ole-package	OLE Ole10Native stream: MBD00976C48/OLE10NatIvE	1701 bytes

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