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

Static analysis result for SHA-256 140e0a7cbdf38d18…

MALICIOUS

Office (OLE) / .XLS

1013.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-01
MD5: 49d5f32b3370dabc49c0ed318be8f7f8 SHA-1: b35c0e2b608b6232287faf2b4afd3446ffbbb7ad SHA-256: 140e0a7cbdf38d18b8600bd7934d6daf9af95a8db11a11917aceb39465bfe77f
108 Risk Score

Malware Insights

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

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in the Equation Editor. The presence of an OLE object containing this exploit payload strongly suggests this attack vector. No VBA macros were found to be executable, and the document body was unreadable, making it impossible to determine the exact nature of the payload or its ultimate goal.

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
a36053a1addf9cffbd5055af0874dfb56117a9cacedec30146708cf61ec29da8		 ole-package OLE Ole10Native stream: MBD01E37FC2/olE10nAtIVE 1444 bytes

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