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

Static analysis result for SHA-256 b96d37c7b282792e…

MALICIOUS

Office (OLE) / .XLS

1.08 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-29
MD5: 67de10726afd008265f316a7a2a96ab9 SHA-1: a23a13bd2119cac264b1b453480f1b3472cf2b65 SHA-256: b96d37c7b282792e76751fd8005a7557bb299dadfcefd91cd85d44b6a3f5f41a
108 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in Microsoft Equation Editor. The presence of an OLE object containing a payload further supports this. No VBA macros were found to be executable, suggesting the exploit is directly 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
ed8da65f0f0a4cc2a905cfcf1ae916bf05ced375ebeefae9a837c8bf84ad6699		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3618 bytes
ole10native_00.bin
858f197ba8ad7958ca7b122516451c14d0d16aee7d7d8b234938bc6eca51e48d		 ole-package OLE Ole10Native stream: MBD01541A6C/olE10naTIve 1470 bytes

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