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

Static analysis result for SHA-256 7131b82b77924238…

MALICIOUS

Office (OLE) / .XLS

170.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-06-15
MD5: 57b9f36b7ff2ff88c419d7b652108392 SHA-1: 4c1868c6cdabb597ceb82f6230d8f6899ce2d50a SHA-256: 7131b82b77924238dc3a86aafb04c522513d4e0dbdf7d0dc2b620d9998a40940
108 Risk Score

Malware Insights

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

The sample is an Excel file containing an embedded Equation Editor object that exploits CVE-2017-11882. While the VBA project itself contains no executable statements, the presence of the Ole10Native payload strongly indicates that the file is designed to leverage this known vulnerability for initial execution. The SHA256 hash is included as an IOC.

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
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
31b929b7341108888ce72d34cc791ae6626100ac0e0ef1a178eefe9426ec08d3		 ole-package OLE Ole10Native stream: MBD0132824C/OLe10NAtIvE 1489 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.