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

Static analysis result for SHA-256 648ab5460c43066a…

MALICIOUS

Office (OLE) / .XLS

394.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-10
MD5: 744aaca4c6285f7386c473287f1d131a SHA-1: 9163588061c4e64690c949c2cffd5fd22a400b6e SHA-256: 648ab5460c43066a6a2d96866b2800281ddee93b48e4f8b5df37d340dbe0656f
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

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 object related to Equation Editor further supports this. No VBA macros were found to be executable, and the document body was not parsable, suggesting the exploit is the primary mechanism for payload delivery.

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
4f434eb0693648754399544337ff5433a9eae30dfe2bc3af75c5fcbd6a3c3322		 ole-package OLE Ole10Native stream: MBD000AC304/oLe10NATIve 1688 bytes

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