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

Static analysis result for SHA-256 24e58cfe60580cad…

MALICIOUS

Office (OLE) / .DOC

1.10 MB First seen: 2022-07-06
MD5: b0ed2e09cf74737cb1f27b5a27e92d21 SHA-1: 8a007d927669dc00a4be02d5e2fad9921ef24a37 SHA-256: 24e58cfe60580cad529b5f055fd36305704b48b4fad8f1c3d00a586378779d7c
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 used for exploiting the CVE-2017-11882 vulnerability. This vulnerability allows for arbitrary code execution when the document is opened. The embedded ole10native artifact likely contains the second-stage 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
1883f45224b109e7e22539ef9f70d5237cbc3533d95d95b0b46132089ccc9266		 ole-package OLE Ole10Native stream: ole10nAtIvE 1140480 bytes

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