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

Static analysis result for SHA-256 a75f12f4515a1b8e…

MALICIOUS

Office (OLE) / .XLS

157.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-05-25
MD5: dabfd7cf473c8d763351a683db36ae1b SHA-1: 8ad03bafc68f7814a6a24be6df69dad76267eb9c SHA-256: a75f12f4515a1b8ec221711d0ca1adc6eb517a4565fd1af93c9c93f52035a986
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in the Equation Editor component of Microsoft Office. This vulnerability allows for arbitrary code execution when a specially crafted OLE object is processed. The embedded OLE object, identified as ole10native_00.bin, likely contains the exploit payload. No VBA macros were found to contain executable statements, suggesting the exploit is solely reliant on the Equation Editor vulnerability.

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
7f19dc6cb9c7158a55db5d87cbb901ed2ab1f859e59ba3d08209839b346ab22a		 ole-package OLE Ole10Native stream: MBD0081395E/OLe10nAtIVe 1535 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.