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

Static analysis result for SHA-256 b930ebe81e01ae35…

MALICIOUS

Office (OLE) / .XLS

393.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-08
MD5: 03c514cf42269f1a1ff588ef31fc0995 SHA-1: e6e23b75727b883beecda4fdb3948fee86d35da4 SHA-256: b930ebe81e01ae35046009f964f5044260ac158b23c10bffc08742c929798a88
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 that the sample exploits a vulnerability in the Equation Editor OLE object. While no VBA macros were found to contain executable statements, the presence of the Equation Editor exploit strongly suggests the file's purpose is to achieve arbitrary code execution on the victim's machine. The SHA256 hash is included as an IOC.

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
5c2f58eaa238706728ba1f0b0ac2cdbc0f5723c8c636cb95df788b3929902e98		 ole-package OLE Ole10Native stream: MBD01861582/olE10nAtiVE 1703 bytes

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