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

Static analysis result for SHA-256 0fcbe089e86cb1af…

MALICIOUS

Office (OLE) / .XLS

750.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-22
MD5: 149c61dbc33f31e9379e072db11ee179 SHA-1: db7708747cb71c6701789a23326477b15a6e9651 SHA-256: 0fcbe089e86cb1afe4c73148bc58976ead854bc16c000b3be9bbccd9c0f06d22
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 exploitation of a known vulnerability in the Equation Editor. While VBA macros were present, they contained no executable statements, suggesting the primary malicious mechanism is the embedded OLE object. The file's purpose is to leverage this exploit for initial execution.

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
1d3b71b8c6234aace88f31f6e674b07383e015a2e68993dcd4fc2526aa470fe5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2412 bytes
ole10native_00.bin
9dfa9c104375a7ee3e6980707b7381b7a94ff693e39b02d31b887dc9d5a2f9b3		 ole-package OLE Ole10Native stream: MBD0200C13D/Ole10Native 1591 bytes

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