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

Static analysis result for SHA-256 8929f197929864ef…

MALICIOUS

Office (OLE) / .DOC

884.0 KB First seen: 2022-05-25
MD5: ffc8a6b0e246a0c40e761ca047e6328e SHA-1: 8b37afc6f33cf20a2fae3ca95940cc984f04ae5b SHA-256: 8929f197929864eff40d76de0e100ab6e7b5f524f524b8b32711ee4383e3d72f
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains an embedded Equation Editor OLE object that is known to be vulnerable to CVE-2017-11882. This vulnerability allows for the execution of arbitrary code when the object is loaded. 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 ole-package OLE Ole10Native stream: OLe10nAtiVE 895790 bytes
SHA-256: e57b00a242f69a52f957a75ca15642c87b4f0657a718ffbeea25900d3b7730a0

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