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

Static analysis result for SHA-256 e9c0417566e7bd71…

MALICIOUS

Office (OLE) / .XLS

1014.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-01
MD5: 8b02beee5fbbb13290431c85345d1f16 SHA-1: c0b5764db18cda8dd561b3d5505aca64bb2b2143 SHA-256: e9c0417566e7bd717c50b803094fbd7a7b9142c5014e6bf7e33c27e66df974e5
108 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059 Command and Scripting Interpreter T1059.005 Command and Scripting Interpreter: Visual Basic

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates that the file contains a payload exploiting this specific vulnerability. The presence of an OLE Equation Editor object further supports this finding. While the VBA macros themselves do not contain executable statements, the exploit mechanism is embedded within the OLE object, likely leading to the download and execution of a secondary payload.

Heuristics 3

  • 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.
  • 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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
17a7a9a351ce51f5ca32c140a365a97d5040d7f371a139c07e332366b8244246		 ole-package OLE Ole10Native stream: MBD01E3E42E/OlE10NATIVE 1755 bytes

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