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

Static analysis result for SHA-256 a3039c9318d65636…

MALICIOUS

Office (OLE) / .DOC

954.5 KB First seen: 2022-09-01
MD5: 0a7e0d291e852eb126dab8a50f4aa3c5 SHA-1: 55a4827826062df65eacc062489534c5eba3e024 SHA-256: a3039c9318d65636cff5162e637ce5eb893ce8583089aef4b27978b9abd3e006
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains a malicious Equation Editor OLE object, specifically leveraging the CVE-2017-11882 vulnerability. This indicates the document is designed to exploit this known flaw for initial execution. No document body or script content was available for further analysis, but the presence of the exploit is sufficient evidence of malicious intent.

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
b2b74274ac381a4c888a5b43fe5301d8425bea615e599b34e5a43e689f703ee1
ole-package OLE Ole10Native stream: oLE10NAtive 967595 bytes