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

Static analysis result for SHA-256 ae242fa323e2341a…

MALICIOUS

Office (OLE) / .XLS

341.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-10-21
MD5: 612cddddf70fed2ec457298a07e3f199 SHA-1: 1f7480757696d21fe85e8fd13a8ce5698b75b503 SHA-256: ae242fa323e2341a1642e947097d38678148876b4465b979bf54d37cbd872a05
100 Risk Score

Malware Insights

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

The critical heuristic firing indicates the presence of a payload exploiting CVE-2017-11882 within an Equation Editor OLE object. This exploit is known to be used for arbitrary code execution. The presence of the ole10native artifact further supports the exploitation vector.

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
fa1950b5fd2c72b2f9520f92ae3882e56061465f2d69b6edff6d57208dae5606		 ole-package OLE Ole10Native stream: MBD0002D061/olE10NaTIve 1641 bytes

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