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

Static analysis result for SHA-256 fea8ff4450ded421…

MALICIOUS

Office (OLE) / .DOC

1000.5 KB First seen: 2022-08-16
MD5: 9fb86a29589b256ebef8832a46cfd5dd SHA-1: 27723c585991179e2874de195e2132390e09bcfa SHA-256: fea8ff4450ded421149f2348c77d896609454c8f23390c03afbb6c904308ef96
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file contains an embedded Equation Editor OLE object that is known to be used to exploit the CVE-2017-11882 vulnerability. This vulnerability allows for arbitrary code execution when the object is processed. The embedded artifact 'ole10native_00.bin' likely contains the exploit payload.

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
9fce1cb68fc54de0dba5c2e7ffeda14ac534e016760867963f88326b9e3947b7		 ole-package OLE Ole10Native stream: ole10NatiVE 1014072 bytes

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