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

Static analysis result for SHA-256 0d7d7eb8307aa85c…

MALICIOUS

Office (OLE) / .XLS

165.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-02-20
MD5: feb80d2275b2fd14c815716366a0b80a SHA-1: 164cef49b701b7b87ebfeac7ed3f2c8a2c5c0aaa SHA-256: 0d7d7eb8307aa85cf97d60eb6a7ff3529b3101e2aaf5ab0ba434d508a6cdf565
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an Excel file containing an embedded OLE object that exploits CVE-2017-11882 in the Equation Editor. This vulnerability allows for arbitrary code execution when the object is processed. No VBA macros were found to be executable, but the presence of the exploit object is sufficient for malicious execution. The file's SHA256 hash is provided 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
fa9c65ca6f3975b50f8a0b9b69a4eaad33c052f07475a04a633b0a24ff8926aa		 ole-package OLE Ole10Native stream: MBD00467BAE/oLE10NaTivE 1471 bytes

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