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

Static analysis result for SHA-256 c8743fb6efa43940…

MALICIOUS

Office (OLE) / .XLS

746.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-23
MD5: 213d6cdb4ba6626de9d1d4c8a022d9b2 SHA-1: ac1c8161acb070af77a01c99a3ee3a078a4fb40c SHA-256: c8743fb6efa43940673e342940a34d36a2d1eef3262a569b0f651283fe141b7b
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 vulnerability within the Equation Editor OLE object. This technique is commonly used to achieve arbitrary code execution on the victim's machine. No VBA macros were found to be executable, suggesting the primary malicious functionality relies on the Equation Editor exploit.

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
ed31fa303fb7ee0344a2aea36664e697346c002b05a3751916992ca407ed50d2		 ole-package OLE Ole10Native stream: MBD024DD848/oLE10naTiVE 1655 bytes

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