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

Static analysis result for SHA-256 9216758442779414…

MALICIOUS

Office (OLE) / .DOC

972.5 KB First seen: 2022-09-01
MD5: c9e7c700f8baaef92abccc68f5e5db5c SHA-1: 7c29649c49aa0f74ea6438b5a2723b01c480e8f0 SHA-256: 92167584427794148d3fd13262825da5a30a8fef5f5a275451c21d8af8b78cd7
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The critical heuristic firing indicates the presence of a payload exploiting CVE-2017-11882 within an Equation Editor OLE object. This is a known vulnerability often leveraged to execute arbitrary code. The document body is unreadable, and no scripts were extracted, but the exploit itself is sufficient evidence of malicious intent.

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
5f4aee893737a18a9f86d0c2f5b4147c9def4ac90205cb31bdacc685151a09ff
ole-package OLE Ole10Native stream: olE10NatiVE 985539 bytes