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

Static analysis result for SHA-256 4d7cdd5bc25326ca…

MALICIOUS

Office (OLE) / .XLS

392.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-07
MD5: 245d6b8e2a5faf4b5fec6a25db75baae SHA-1: 07c408079b6edae6230993d02f24fb5b0f8d5b7c SHA-256: 4d7cdd5bc25326caf52663ba12796991c6eda238020d6a12c622d0f8f832de4f
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.005 PowerShell

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the file contains a payload exploiting this specific vulnerability. The OLE_EQUATION_EDITOR heuristic further confirms the presence of an Equation Editor object. Although the VBA project contains no executable statements, the embedded OLE object is the primary vector for exploitation, likely leading to the execution of a second-stage 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
5e629a2dc20fcd74e8abc785ed5721b43b7cadd897c3ea02748d2ba3938f37e4		 ole-package OLE Ole10Native stream: MBD0131AF33/OLe10NaTiVE 1149 bytes

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