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

Static analysis result for SHA-256 8ee7b1174185193c…

MALICIOUS

Office (OLE) / .XLS

393.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-09
MD5: 5ec1464604075c62849334aee39f5571 SHA-1: 447f346b3259f6ec1195fc387bbeab0c3c5ff13e SHA-256: 8ee7b1174185193cc0f757cbc3d385daaba56c2518c111ffbffdbd1ad77a2140
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 file contains a payload exploiting this specific vulnerability. The presence of an OLE Equation Editor object further supports this. While no VBA macros were found to be executable, the exploit itself is sufficient to achieve code 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
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
255e0a615a89a704f3302c0f00be08a5c5558fdd4042812f28a202c9566fe3ba		 ole-package OLE Ole10Native stream: MBD01D7D8A4/Ole10nATivE 1669 bytes

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