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

Static analysis result for SHA-256 aac3de6f4058dde7…

MALICIOUS

Office (OLE) / .XLS

511.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-14
MD5: 777e98f88f5f24c46d8c6135d6db2bb3 SHA-1: 26187eb7769cf7514cf309d9ba3311af69aecb13 SHA-256: aac3de6f4058dde7fcea9dff78566aae9735eb447f5a4032449ef1190493dc37
108 Risk Score

Malware Insights

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

The critical heuristic firing indicates the presence of a CVE-2017-11882 Equation Editor exploit. This vulnerability allows for arbitrary code execution when the crafted OLE object is processed. No VBA macros were found to be executable, suggesting the exploit is directly embedded 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
8b3680c43a956de7821e45e3d94cbe75daa748e2b23b4ced4ef663472eb9619a		 ole-package OLE Ole10Native stream: MBD015AD0AE/OLE10nAtIvE 1844 bytes

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