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

Static analysis result for SHA-256 92f9f4f1f0aaf8cb…

MALICIOUS

Office (OLE) / .XLS

393.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-09
MD5: 7e859f1c592d38163a51e5f4c74288b7 SHA-1: 9a4b84912377a3a6c3c492e79e76f84be4fa1826 SHA-256: 92f9f4f1f0aaf8cba44fa5c6fa0dede51aee2b112f79ab7ba930d415e1e8caab
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an Excel spreadsheet containing a malicious OLE object that exploits the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution when the document is opened, leading to the delivery of a secondary payload. No VBA macros were found to be executable, and the document body was not parsable.

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
1b6a285d6f5a192e8f2a3bfaf06470e2299a5899e13efef9fd9a1c032584ce38		 ole-package OLE Ole10Native stream: MBD01D96387/oLE10nAtiVe 1615 bytes

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