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

Static analysis result for SHA-256 1a69c8c18f6a66c5…

MALICIOUS

Office (OLE) / .DOC

1.76 MB First seen: 2022-06-08
MD5: 3a719e015a77b37681feb160fa2ed0ab SHA-1: 8e6f9cd9e851f8e76de55b2d68c828c7e7919e14 SHA-256: 1a69c8c18f6a66c5c9fd552323dc7991f8d950ff0567d2019290e230cc05fa40
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file 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 accessed. The extracted artifact 'ole10native_00.bin' is the payload associated with this exploit.

Heuristics 3

  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin
5502d3df811aca161610d63eb28d4ed41039f0100a5b21e039d451ee9099288d
ole-package OLE Ole10Native stream: OLE10natIvE 1832317 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.