Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 d9d30d39e500fe31…

MALICIOUS

Office (OLE) / .XLS

863.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-05-13
MD5: 9789b0d7f8aec45c8a17f78176bd3a02 SHA-1: 8fd4c20c1d952f2e1086cb402ec03176c316ce6c SHA-256: d9d30d39e500fe31054ac222142c0dc2343552ebe709297e085af5e4a4e09e28
164 Risk Score

Malware Insights

MITRE ATT&CK
T1559.002 Component Object Model Hijacking

The high-severity heuristic firing for 'OLE_EQUATION_EDITOR' indicates the presence of a vulnerable Equation Editor object within the OLE file. This strongly suggests an exploit targeting CVE-2017-11882 or a similar vulnerability. No VBA macros were found to be executable, and the document body was unreadable, limiting further analysis of the delivery mechanism. The file is an Excel spreadsheet, which is a common format for delivering exploits.

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.
  • Equation Editor shellcode downloads a second-stage payload critical OLE_MTEF_SHELLCODE_DOWNLOAD_URL
    The shellcode reached by the Equation Editor overflow resolves download/exec APIs and fetches a second-stage payload. The URL was recovered by emulating the shellcode's self-decoding stub; an integer-encoded host (e.g. http://000030000706151) is normalised to its dotted-quad form and both spellings are surfaced.
  • VBA project contains no executable statements info 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://107.173.143.35/500000000000000000000000000.Php In document text (OLE body)
    • http://0000015353307443/500000000000000000000000000.PhpIn document text (OLE body)
    • http://000030000706151In document text (OLE body)
    • http://192.3.140.105Decoded from obfuscated IP host (000030000706151)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
SHA-256: 7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisWorkbook"
Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Sheet1"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Sheet2"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Sheet3"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
ole10native_00.bin ole-package OLE Ole10Native stream: MBD013E661E/oLe10NAtIVE 1721 bytes
SHA-256: 5e6cece2fbf31d53a1ae82c228c77d324d93bc219b6317a673fc5ea5457499ca

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