Analysis

  • max time kernel
    146s
  • max time network
    157s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    26-09-2021 14:52

General

  • Target

    748b112881047820f530c202bb59488e.exe

  • Size

    4.0MB

  • MD5

    748b112881047820f530c202bb59488e

  • SHA1

    edf77f969bf54a47b21e6179cbcabb4651706d7c

  • SHA256

    82285ac0988c68f9b9ecc7649cb9c6a3f3ecb242dd198465dbd4236d7fa6a59c

  • SHA512

    252640d935ce3c7885fa48496b1b9c405f5dc9e719eda9c965d5fec46f877c00a7d96b14acf7410fbef9dbbfa9723932b54cdc75084fdd54e492eaa8d6f37ad6

Malware Config

Signatures

  • ServHelper

    ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.

  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • Grants admin privileges 1 TTPs

    Uses net.exe to modify the user's privileges.

  • Modifies RDP port number used by Windows 1 TTPs
  • Sets DLL path for service in the registry 2 TTPs
  • Drops file in System32 directory 1 IoCs
  • Drops file in Windows directory 8 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 63 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\748b112881047820f530c202bb59488e.exe
    "C:\Users\Admin\AppData\Local\Temp\748b112881047820f530c202bb59488e.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1840
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -ep bypass & 'C:\Users\Admin\AppData\Local\Temp\\ready.ps1'
      2⤵
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3188
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\zea4ipco\zea4ipco.cmdline"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:648
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES14A2.tmp" "c:\Users\Admin\AppData\Local\Temp\zea4ipco\CSC3DC7E20752B24731AA2DA089C7149AA5.TMP"
          4⤵
            PID:940
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3680
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3784
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1044
        • C:\Windows\SysWOW64\reg.exe
          "C:\Windows\system32\reg.exe" ADD "HKLM\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp" /v PortNumber /t REG_DWORD /d 0x1C21 /f
          3⤵
            PID:3980
          • C:\Windows\SysWOW64\reg.exe
            "C:\Windows\system32\reg.exe" add HKLM\system\currentcontrolset\services\TermService\parameters /v ServiceDLL /t REG_EXPAND_SZ /d C:\Windows\branding\mediasrv.png /f
            3⤵
            • Modifies registry key
            PID:1164
          • C:\Windows\SysWOW64\reg.exe
            "C:\Windows\system32\reg.exe" add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services" /v fEnableWddmDriver /t reg_dword /d 0 /f
            3⤵
              PID:1812
            • C:\Windows\SysWOW64\net.exe
              "C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:2040
              • C:\Windows\SysWOW64\net1.exe
                C:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
                4⤵
                  PID:864
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:1428
                • C:\Windows\SysWOW64\cmd.exe
                  cmd /c net start rdpdr
                  4⤵
                  • Suspicious use of WriteProcessMemory
                  PID:640
                  • C:\Windows\SysWOW64\net.exe
                    net start rdpdr
                    5⤵
                    • Suspicious use of WriteProcessMemory
                    PID:3112
                    • C:\Windows\SysWOW64\net1.exe
                      C:\Windows\system32\net1 start rdpdr
                      6⤵
                        PID:2356
                • C:\Windows\SysWOW64\cmd.exe
                  "C:\Windows\system32\cmd.exe" /c cmd /c net start TermService
                  3⤵
                  • Suspicious use of WriteProcessMemory
                  PID:656
                  • C:\Windows\SysWOW64\cmd.exe
                    cmd /c net start TermService
                    4⤵
                    • Suspicious use of WriteProcessMemory
                    PID:3292
                    • C:\Windows\SysWOW64\net.exe
                      net start TermService
                      5⤵
                      • Suspicious use of WriteProcessMemory
                      PID:3160
                      • C:\Windows\SysWOW64\net1.exe
                        C:\Windows\system32\net1 start TermService
                        6⤵
                          PID:3508
                  • C:\Windows\SysWOW64\cmd.exe
                    "C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f
                    3⤵
                      PID:3680
                    • C:\Windows\SysWOW64\cmd.exe
                      "C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f
                      3⤵
                        PID:3712

                  Network

                  MITRE ATT&CK Matrix ATT&CK v6

                  Persistence

                  Account Manipulation

                  1
                  T1098

                  Registry Run Keys / Startup Folder

                  1
                  T1060

                  Defense Evasion

                  Modify Registry

                  2
                  T1112

                  Lateral Movement

                  Remote Desktop Protocol

                  1
                  T1076

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
                    MD5

                    f3068198b62b4b70404ec46694d632be

                    SHA1

                    7b0b31ae227cf2a78cb751573a9d07f755104ea0

                    SHA256

                    bd0fab28319be50795bd6aa9692742ba12539b136036acce2e0403f10a779fc8

                    SHA512

                    ef285a93898a9436219540f247beb52da69242d05069b3f50d1761bb956ebb8468aeaeadcb87dd7a09f5039c479a31f313c83c4a63c2b2f789f1fe55b4fa9795

                  • C:\Users\Admin\AppData\Local\Temp\RES14A2.tmp
                    MD5

                    084ddb1c6737f163e50540ecefc58a13

                    SHA1

                    8e0f284bb0dd09c6019ecb926978b736c06c55a6

                    SHA256

                    4d13695df14961657d82bed239e007674e5553ecd3a91109bf226734fba4663a

                    SHA512

                    0cf33d8b9724336121e422ca79bad387c986daa5c6076e149eb1d040930f087142fff26235ffc1d7031c35512996b4dc0691d21cde397af3eaef120b7ade3fc0

                  • C:\Users\Admin\AppData\Local\Temp\get-dnsprovider.PS1
                    MD5

                    9cc8773f50008a3bce99c9d5e6cf4635

                    SHA1

                    855d5ab66b3d0735e73008659c4a199d4492c8cb

                    SHA256

                    d3c9d4a6db3fcee8b9af72fa8cc0b776264357a9f55498852a5e0792aed8603c

                    SHA512

                    959ad4270b888ae45fd0ebc12fa2fbb3f695eb26012337dfdf136add2e1bcdcb470266c2fcdb747617dde5eaeb682cf8034f5b5907ff6f17c95135fb0d343d80

                  • C:\Users\Admin\AppData\Local\Temp\ready.ps1
                    MD5

                    28d9755addec05c0b24cca50dfe3a92b

                    SHA1

                    7d3156f11c7a7fb60d29809caf93101de2681aa3

                    SHA256

                    abb6ceb444b3dc29fcdcb8bda4935a6a792b85bb7049cb2710d97415d9411af9

                    SHA512

                    891a72eeef42be3f04067225a9665020704c99f9c17473ca57e5b946dfa35cb469fa91a794ea30115ce3ed0e940edb3ccff69a16a888379f5ac46a12afaa4c42

                  • C:\Users\Admin\AppData\Local\Temp\zea4ipco\zea4ipco.dll
                    MD5

                    61e2da191a1420181a0c6a7624447407

                    SHA1

                    4d381f4322dfb38d794682379b05431597dd91d1

                    SHA256

                    71f57996319f11749daea57bdf6199d0a5121600277fc3e23ba705d285c94284

                    SHA512

                    2c4b3943fbf4aafbd7cfb115d553fec7f15902c734258b54c13bd67ff6841c50980638ec56337b0f20ab49df0897ac757bd90fb7cd2bff07bd19d9df5946a019

                  • \??\c:\Users\Admin\AppData\Local\Temp\zea4ipco\CSC3DC7E20752B24731AA2DA089C7149AA5.TMP
                    MD5

                    7914094daddde29392f7295dc5b22d57

                    SHA1

                    434a51b7daeedeff245801e3c72b39a72eca4720

                    SHA256

                    1cf98526b529778dad21509bc14f2a4f669aca3e449f15056bf7561438b0069b

                    SHA512

                    a2ae83665ff0b59c2faa60658e80376f522ccd69ca73e378cd3d529012f6ab1a02f67e3fdffd9a42d851af69c1560cc69d21e51400767b8f12285d56a544419a

                  • \??\c:\Users\Admin\AppData\Local\Temp\zea4ipco\zea4ipco.0.cs
                    MD5

                    9f8ab7eb0ab21443a2fe06dab341510e

                    SHA1

                    2b88b3116a79e48bab7114e18c9b9674e8a52165

                    SHA256

                    e1a4fbe36125e02e100e729ce92ab74869423da87cb46da6e3c50d7c4410b2d9

                    SHA512

                    53f5dc4c853af5a412fde895635ef4b2de98a165e3546130fdd17a37a5c3b177e21eccf70a5ddf936ac491da2d7e8fcdbc1e564a95ec01b097841aa78869989b

                  • \??\c:\Users\Admin\AppData\Local\Temp\zea4ipco\zea4ipco.cmdline
                    MD5

                    3a637a6d4efef754a180e656538430b8

                    SHA1

                    b9bc1b5ff604bd766e031afe311c1eea7b7314a8

                    SHA256

                    a1c57343e12e1415e863e022a1e4b27e2c45c2c887b4dd2bf5c77ff1da9b6ca4

                    SHA512

                    39d7d4a694325546c8eed60cf5fa4a1ebadc800254c519443da0ed22895bace94e93aa4944c51684140e1ae0e9ec3ff5962b8d29faad1ede1fc4de1a36704801

                  • memory/640-1006-0x0000000000000000-mapping.dmp
                  • memory/648-146-0x0000000000000000-mapping.dmp
                  • memory/656-1009-0x0000000000000000-mapping.dmp
                  • memory/864-1002-0x0000000000000000-mapping.dmp
                  • memory/940-149-0x0000000000000000-mapping.dmp
                  • memory/1044-698-0x0000000004812000-0x0000000004813000-memory.dmp
                    Filesize

                    4KB

                  • memory/1044-684-0x0000000000000000-mapping.dmp
                  • memory/1044-697-0x0000000004810000-0x0000000004811000-memory.dmp
                    Filesize

                    4KB

                  • memory/1044-742-0x000000007EE70000-0x000000007EE71000-memory.dmp
                    Filesize

                    4KB

                  • memory/1164-963-0x0000000000000000-mapping.dmp
                  • memory/1428-1005-0x0000000000000000-mapping.dmp
                  • memory/1812-964-0x0000000000000000-mapping.dmp
                  • memory/1840-124-0x0000000007D40000-0x0000000007D41000-memory.dmp
                    Filesize

                    4KB

                  • memory/1840-115-0x0000000000FB0000-0x0000000000FB1000-memory.dmp
                    Filesize

                    4KB

                  • memory/1840-123-0x00000000058B0000-0x00000000058B1000-memory.dmp
                    Filesize

                    4KB

                  • memory/1840-122-0x0000000000FB4000-0x0000000000FB5000-memory.dmp
                    Filesize

                    4KB

                  • memory/1840-121-0x00000000058C0000-0x00000000058C1000-memory.dmp
                    Filesize

                    4KB

                  • memory/1840-120-0x0000000005BE0000-0x0000000005BE1000-memory.dmp
                    Filesize

                    4KB

                  • memory/1840-118-0x0000000000FB2000-0x0000000000FB3000-memory.dmp
                    Filesize

                    4KB

                  • memory/1840-119-0x0000000000FB3000-0x0000000000FB4000-memory.dmp
                    Filesize

                    4KB

                  • memory/1840-116-0x00000000052E0000-0x00000000056DF000-memory.dmp
                    Filesize

                    4.0MB

                  • memory/2040-1001-0x0000000000000000-mapping.dmp
                  • memory/2356-1008-0x0000000000000000-mapping.dmp
                  • memory/3112-1007-0x0000000000000000-mapping.dmp
                  • memory/3160-1011-0x0000000000000000-mapping.dmp
                  • memory/3188-136-0x0000000007D60000-0x0000000007D61000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-132-0x0000000007430000-0x0000000007431000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-1052-0x000000007EB50000-0x000000007EB51000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-125-0x0000000000000000-mapping.dmp
                  • memory/3188-128-0x0000000004E20000-0x0000000004E21000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-129-0x0000000007080000-0x0000000007081000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-130-0x0000000007082000-0x0000000007083000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-131-0x00000000076C0000-0x00000000076C1000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-133-0x0000000007600000-0x0000000007601000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-135-0x0000000007F90000-0x0000000007F91000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-137-0x00000000086A0000-0x00000000086A1000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-138-0x0000000008600000-0x0000000008601000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-144-0x0000000009C60000-0x0000000009C61000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-145-0x0000000009320000-0x0000000009321000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-176-0x0000000009610000-0x0000000009611000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-153-0x0000000009280000-0x0000000009281000-memory.dmp
                    Filesize

                    4KB

                  • memory/3188-155-0x0000000007083000-0x0000000007084000-memory.dmp
                    Filesize

                    4KB

                  • memory/3292-1010-0x0000000000000000-mapping.dmp
                  • memory/3508-1012-0x0000000000000000-mapping.dmp
                  • memory/3680-198-0x0000000009220000-0x0000000009253000-memory.dmp
                    Filesize

                    204KB

                  • memory/3680-206-0x0000000009200000-0x0000000009201000-memory.dmp
                    Filesize

                    4KB

                  • memory/3680-186-0x00000000052F0000-0x00000000052F1000-memory.dmp
                    Filesize

                    4KB

                  • memory/3680-412-0x0000000008E70000-0x0000000008E71000-memory.dmp
                    Filesize

                    4KB

                  • memory/3680-406-0x0000000009430000-0x0000000009431000-memory.dmp
                    Filesize

                    4KB

                  • memory/3680-213-0x0000000009550000-0x0000000009551000-memory.dmp
                    Filesize

                    4KB

                  • memory/3680-177-0x0000000000000000-mapping.dmp
                  • memory/3680-212-0x0000000009360000-0x0000000009361000-memory.dmp
                    Filesize

                    4KB

                  • memory/3680-211-0x000000007F600000-0x000000007F601000-memory.dmp
                    Filesize

                    4KB

                  • memory/3680-1025-0x0000000000000000-mapping.dmp
                  • memory/3680-187-0x00000000052F2000-0x00000000052F3000-memory.dmp
                    Filesize

                    4KB

                  • memory/3712-1026-0x0000000000000000-mapping.dmp
                  • memory/3784-441-0x00000000072E0000-0x00000000072E1000-memory.dmp
                    Filesize

                    4KB

                  • memory/3784-468-0x000000007F560000-0x000000007F561000-memory.dmp
                    Filesize

                    4KB

                  • memory/3784-442-0x00000000072E2000-0x00000000072E3000-memory.dmp
                    Filesize

                    4KB

                  • memory/3784-432-0x0000000000000000-mapping.dmp
                  • memory/3980-962-0x0000000000000000-mapping.dmp