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

Static analysis result for SHA-256 46ae8bb9fd25f0c8…

MALICIOUS

Office (OLE) / .XLS

1.54 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-12-06
MD5: 51b25d00a857fa25a25e4b4e3b153b7c SHA-1: f61b8444c7e8b935ef770056f44f06c6be24861c SHA-256: 46ae8bb9fd25f0c86eebb2c68f7060f5fdf7c04810e0a87fe209c205a5019799
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution

The sample is an Excel file containing an embedded Equation Editor object, which is a known vector for exploiting CVE-2017-11882. The critical heuristic firing confirms the presence of a payload within this object, indicating it's designed to exploit this vulnerability upon opening. No VBA macros were found to be executable, suggesting the primary attack relies on the Equation Editor exploit.

Heuristics 4

  • 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.
  • x86 GetPC stub (CALL $+5; POP EBX) high SC_GETPC_CALL
    x86 GetPC stub (CALL $+5; POP EBX)
  • 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
38060e72025c177509d6d1c8465bb713b41babcf4529c1030d16afcf17567165		 ole-package OLE Ole10Native stream: MBD00B41636/Ole10Native 1358 bytes

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