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

Static analysis result for SHA-256 294739cff953bbd4…

MALICIOUS

Office (OLE) / .XLS

145.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-23
MD5: 75f03b0cdd937e55de5cb442cf32d995 SHA-1: 6adaca4eff6ac6b02447fed5edc8ece74dc5ced0 SHA-256: 294739cff953bbd4cb90ba91ffc7faf7c169875818c54d5379de317faec5317f
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1559.001 Component Object Model Hijacking

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE strongly indicates exploitation of this known vulnerability. The presence of an Equation Editor OLE object further supports this finding. The exact payload and its subsequent actions are not detailed, but the exploitation method is clear.

Heuristics 2

  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
9e9c4910ba4e89cfbbb13b3780478602091013cea3f52cbe88e36711df094f33		 ole-package OLE Ole10Native stream: MBD027806F7/Ole10Native 1754 bytes

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