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

Static analysis result for SHA-256 3d12cfc068bf7d0a…

MALICIOUS

Office (OLE) / .DOC

3.99 MB First seen: 2022-08-22
MD5: c722462fe581fe5cd7b91aa24a9c2a4d SHA-1: 76e27f6e2f94983beb0225ff286fae0dfb049463 SHA-256: 3d12cfc068bf7d0a82236d343ab2016aeaf527c1aaad578089860131c4729b47
102 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking T1204.002 Malicious File

The sample contains a malicious Equation Editor OLE object, which is a known indicator of exploitation for CVE-2017-11882. This technique is used to execute arbitrary code, likely to download and run a second-stage payload. The embedded artifact 'ole10native_00.bin' is the direct payload of 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
eb3e8057b215ffb5d9ea315da2f23597ebdf09dd3fd853ff6891aae79fb671fd
ole-package OLE Ole10Native stream: OLE10natiVE 4152956 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.