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

Static analysis result for SHA-256 dba93e88f51fccd0…

MALICIOUS

Office (OLE) / .DOC

854.5 KB First seen: 2023-08-28
MD5: 2c789992232634278b48fe332b75d007 SHA-1: 071d118c5cc277799a5fe4ced47fd582afa37355 SHA-256: dba93e88f51fccd0da33f3ae76630985cad89d0261541f236ff81997813572fd
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing indicates the presence of a payload exploiting CVE-2017-11882 within an Equation Editor OLE object. This technique is commonly used to achieve arbitrary code execution when the document is opened. The embedded OLE object, ole10native_00.bin, likely contains the secondary stage of the attack.

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
516d4142dc0d32596892dac0443eac7a921b4a4e21b58b30c4e3f98b7b7f44d4
ole-package OLE Ole10Native stream: OlE10nATIve 865514 bytes