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

Static analysis result for SHA-256 9c22aff1d30e396e…

MALICIOUS

Office (OLE) / .XLS

1.03 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-28
MD5: 08260ba2505cbe73488e97bab13d291f SHA-1: 0772c758f4869a6a3c43479793e2f962cfb828f3 SHA-256: 9c22aff1d30e396ef914d81ac057bac2d4d2bdb32fdd3d0ee83efec5a1fe0f2f
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.005 PowerShell

The critical heuristic firing for CVE-2017_11882_EQUATION_OLE10NATIVE indicates the file contains a payload exploiting this specific vulnerability. The presence of an OLE object related to Equation Editor further supports this. No VBA macros were found to be executable, suggesting the exploit is directly embedded within the OLE object.

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
ed8da65f0f0a4cc2a905cfcf1ae916bf05ced375ebeefae9a837c8bf84ad6699		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3618 bytes
ole10native_00.bin
0b3e1f5bd8a027a87c17540a6b87bef14fbf703ca39f74ca725466a519323667		 ole-package OLE Ole10Native stream: MBD0104FC13/olE10nATIVE 1706 bytes

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