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

Static analysis result for SHA-256 af7507e086de56c4…

MALICIOUS

Office (OLE) / .XLS

1005.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-03-01
MD5: 49005c3d35eae8dc8dbf2568040e80b2 SHA-1: 301f5d2a9c7efb7f7772f14b2b4a5eb9d36f7e97 SHA-256: af7507e086de56c44f812ab492dfecc5ff83bd6b927f40b44ac036613870dd1f
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 exploitation of a vulnerability in the Equation Editor. This technique is commonly used to execute arbitrary code, leading to the download and execution of further malicious payloads. No VBA macros were found to be executable, and the document body was not parsable.

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
0bedd32ea8c7bec8ef74cc8e5bea59e33d01f9a02d0a98c97ddecca9bc6aa980		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1812 bytes
ole10native_00.bin
0dc5ec821778dc32767d0f33e616f2687e4793590343888820c93ca8872d388c		 ole-package OLE Ole10Native stream: MBD000F63B9/oLE10natIVe 1453 bytes

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