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

Static analysis result for SHA-256 2b05b664b75966d2…

MALICIOUS

Office (OLE) / .XLS

561.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-11-11
MD5: ac60cd7d4282755559ac8d037f83b9ec SHA-1: 62f310e2e7592982b810d3c9f5c066875c9ba1cc SHA-256: 2b05b664b75966d21e428a70526c647c7d0b37eceea005785310378945c497db
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 presence of a known vulnerability exploit within an Equation Editor OLE object. The VBA macros are present but contain no executable statements, suggesting they are not the primary execution vector. The exploit likely leads to arbitrary code execution, enabling further malicious activity.

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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
aebfa3cc9cffd1af88424a4828f90c2a91932c7006bd1640e9ae65f18d99a7e2		 ole-package OLE Ole10Native stream: MBD0065D98B/Ole10Native 167172 bytes
ole10native_01.bin
9a615378ccacd750975c13f7854706206e5e7a4b7493675b442d335391d035db		 ole-package OLE Ole10Native stream: MBD0065D98D/OLE10NATivE 1673 bytes

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