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

Static analysis result for SHA-256 30c201b66317161a…

MALICIOUS

Office (OLE) / .XLS

393.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-03
MD5: 4cf1ae8ea2b037b3b4a3115ccf82efae SHA-1: 8ee94b1826548a983cd5b984a56e87f3dc937a99 SHA-256: 30c201b66317161a4bbe063abbaa319af256bd85fbecbab9ab80cc9f7fcefa4a
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains an embedded Equation Editor OLE object that is known to be vulnerable to CVE-2017-11882. This vulnerability allows for arbitrary code execution when the object is processed. The VBA project itself contains no executable statements, indicating the malicious payload is likely within the OLE object.

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
47549b97d80200e6b8272ad99757c0663d6f36601bb6bc8210e91bb4fd452da7		 ole-package OLE Ole10Native stream: MBD0042CEE7/oLE10NativE 1356 bytes

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