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

Static analysis result for SHA-256 995d3c32991b4736…

MALICIOUS

Office (OLE) / .DOC

1022.5 KB First seen: 2022-11-08
MD5: 4a3ecf3053cca64344d32847d08d62ec SHA-1: e2b157a238ae280c624c1dd7ed2dff6daa1cf825 SHA-256: 995d3c32991b4736e6b91a6c8220449f1176b49cf7d9d34a469a517778c470c3
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains an OLE object that is a known indicator of the CVE-2017-11882 Equation Editor vulnerability. This vulnerability allows for remote code execution when the document is opened, leading to the execution of a malicious payload. No specific family could be identified, but the exploit is a common initial access 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
f82237cca4824cf576bb68ef515b664fa4f8a0cefe8435c93d85f9e27e40b044
ole-package OLE Ole10Native stream: oLe10natiVE 1036652 bytes