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

Static analysis result for SHA-256 e18fe7d8bbfcefb8…

MALICIOUS

Office (OLE) / .XLS

30.5 KB Created: 2016-05-12 06:28:14 Authoring application: Microsoft Excel First seen: 2026-06-24
MD5: 4a856eed4cda6184ceeab120e4848f84 SHA-1: fd81889f27254cf4a2c7236d6b023ebcaa61d633 SHA-256: e18fe7d8bbfcefb8772fa10e9b3d73719bd006ac2a39be0c3b531c7243191e01
230 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell

The sample is an Excel file containing VBA macros. The Auto_Open macro is designed to execute a command using 'cmd.exe /K echo' with a concatenated string that appears to be the EICAR test string. This indicates the file is likely a test or a basic dropper, rather than a sophisticated piece of malware.

Heuristics 7

  • ClamAV: Xls.Malware.Generic-10013209-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Malware.Generic-10013209-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
        Shell "cmd.exe /K echo " + eicarPart1 + eicarPart2
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
    Matched line in script
        Shell "cmd.exe /K echo " + eicarPart1 + eicarPart2
  • Auto_Open macro low OLE_VBA_AUTO
    Auto_Open macro
    Matched line in script
    Sub Auto_Open()
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://github.com/mattias-ohlsson/eicar-standard-antivirus-test-files In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 999 bytes
SHA-256: 9a20dc78175f6d9f375cde5efa4b23889d7cd05e7c4afd24f0a161ede38fb317
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Module1"
Sub Auto_Open()
    ' https://github.com/mattias-ohlsson/eicar-standard-antivirus-test-files

    ' Simple obfuscation
    Dim eicarPart1 As String
    Dim eicarPart2 As String
    eicarPart1 = "X5O!P%@AP[4\PZX54(P^^)7C"
    eicarPart2 = "C)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*"

    Shell "cmd.exe /K echo " + eicarPart1 + eicarPart2
End Sub

Attribute VB_Name = "ThisWorkbook"
Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Sheet1"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

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