Office (OLE) / .XLS malware analysis — malicious · 12944f865ae794ad

MALICIOUS

Office (OLE) / .XLS

1.02 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-02-13

MD5: 0dba9bd4231f6807570d59c5f627eda3 SHA-1: 384b87aa3a47b0363375280223c2688567c4ec96 SHA-256: 12944f865ae794adb12d08c5593f853fe21a05ede595b71d793f3a67d73e759e

150 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1559.002 Component Object Model Hijacking

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in Microsoft Equation Editor. This is further supported by the OLE_EQUATION_EDITOR heuristic. The VBA macros themselves do not contain executable statements, suggesting the malicious payload is directly embedded within the OLE object.

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 ESI) high SC_GETPC_CALL

x86 GetPC stub (CALL $+5; POP ESI)
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` `039f533b55d666f7e7620f4d5ff4901109a1cee72ee2d21224b6392ea05317df`	ole-package	OLE Ole10Native stream: MBD00B4C610/oLe10NatIvE	1286 bytes

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