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

Static analysis result for SHA-256 8d7070a99526ae61…

MALICIOUS

Office (OLE) / .XLS

848.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-18
MD5: b60ac3efe4766771d9de667c4f1d40b7 SHA-1: f3464479c2139192613ed55fae4bd9d38704a74d SHA-256: 8d7070a99526ae61d7080806ab4ad3f77b3ec2a7deb61225a162dd4a481204e0
108 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059.005 Visual Basic T1204.002 Malicious File

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates the exploitation of a known vulnerability in the Equation Editor component. While the VBA macros themselves do not contain executable statements, the presence of the Equation Editor OLE object strongly suggests this exploit is being leveraged to deliver a secondary payload. The file is an Excel spreadsheet, a common delivery mechanism for such exploits.

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.
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
1d3b71b8c6234aace88f31f6e674b07383e015a2e68993dcd4fc2526aa470fe5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2412 bytes
ole10native_00.bin
b205a2fd4e6361f456d520a91ac5cc2f9391e7d0fe48a84b0190d449be748b47		 ole-package OLE Ole10Native stream: MBD00E75591/olE10NatIve 1679 bytes

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