Resubmissions

21-08-2024 01:30

240821-bw3pdsxcnq 10

21-08-2024 01:25

240821-bs432sxbjp 10

Analysis

  • max time kernel
    38s
  • max time network
    62s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-08-2024 01:25

General

  • Target

    dc/3.exe

  • Size

    2.1MB

  • MD5

    a0dad08f164eaa10775ee446d7609671

  • SHA1

    3fddaf10e5776433aedceefbcfa422e2967d37e2

  • SHA256

    6321ebebea1d093460221986382502f6c5bb0a26937d4587f7476993a087db81

  • SHA512

    d404bddb06c9f38b8f9088cef8d63be392d928756a403e8f666ee1ce93fc7d6396e42fbc75db9a7f9f2aee39ccd5cc42a919baf594a873bef068c3146824fbc6

  • SSDEEP

    49152:IBJ9RJN6XwzevCev8gTi5QIxDdetPmp0ndliBv1j51JqAq:ynwQeZTnewdliBvR3Qv

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 6 IoCs
  • Process spawned unexpected child process 18 IoCs

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

  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 12 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Modifies registry class 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\dc\3.exe
    "C:\Users\Admin\AppData\Local\Temp\dc\3.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\SurrogateBroker\WQvQ4rx0fbpv9Ezt6WggfBmo1lRVEZ48dO.vbe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3588
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\SurrogateBroker\o4sZ7CSxS8G8o846TWeqd2QBw2.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:728
        • C:\SurrogateBroker\crtCommon.exe
          "C:\SurrogateBroker/crtCommon.exe"
          4⤵
          • Modifies WinLogon for persistence
          • Checks computer location settings
          • Executes dropped EXE
          • Adds Run key to start application
          • Drops file in Program Files directory
          • Drops file in Windows directory
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4204
          • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
            "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\0jac43bu\0jac43bu.cmdline"
            5⤵
            • Drops file in System32 directory
            • Suspicious use of WriteProcessMemory
            PID:4512
            • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
              C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESDE6.tmp" "c:\Windows\System32\CSC74F43F45D55344A0817EF829927C4C8.TMP"
              6⤵
                PID:3468
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\AexqHVCTb1.bat"
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:4000
              • C:\Windows\system32\chcp.com
                chcp 65001
                6⤵
                  PID:3244
                • C:\Windows\system32\PING.EXE
                  ping -n 10 localhost
                  6⤵
                  • System Network Configuration Discovery: Internet Connection Discovery
                  • Runs ping.exe
                  PID:4972
                • C:\Program Files (x86)\Windows Multimedia Platform\WmiPrvSE.exe
                  "C:\Program Files (x86)\Windows Multimedia Platform\WmiPrvSE.exe"
                  6⤵
                  • Executes dropped EXE
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1180
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "MoUsoCoreWorkerM" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows NT\Accessories\en-US\MoUsoCoreWorker.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1796
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "MoUsoCoreWorker" /sc ONLOGON /tr "'C:\Program Files\Windows NT\Accessories\en-US\MoUsoCoreWorker.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2208
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "MoUsoCoreWorkerM" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows NT\Accessories\en-US\MoUsoCoreWorker.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:980
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 5 /tr "'C:\SurrogateBroker\fontdrvhost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:760
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\SurrogateBroker\fontdrvhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:5104
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 12 /tr "'C:\SurrogateBroker\fontdrvhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3328
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 9 /tr "'C:\Windows\Logs\HomeGroup\StartMenuExperienceHost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1896
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\Logs\HomeGroup\StartMenuExperienceHost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:924
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 14 /tr "'C:\Windows\Logs\HomeGroup\StartMenuExperienceHost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1264
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\WmiPrvSE.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3088
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Multimedia Platform\WmiPrvSE.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3776
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\WmiPrvSE.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:5068
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 10 /tr "'C:\SurrogateBroker\backgroundTaskHost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3768
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\SurrogateBroker\backgroundTaskHost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4324
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 9 /tr "'C:\SurrogateBroker\backgroundTaskHost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3056
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "crtCommonc" /sc MINUTE /mo 5 /tr "'C:\SurrogateBroker\crtCommon.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3204
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "crtCommon" /sc ONLOGON /tr "'C:\SurrogateBroker\crtCommon.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1032
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "crtCommonc" /sc MINUTE /mo 7 /tr "'C:\SurrogateBroker\crtCommon.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1552

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\SurrogateBroker\WQvQ4rx0fbpv9Ezt6WggfBmo1lRVEZ48dO.vbe

        Filesize

        220B

        MD5

        9377cb5a423cf8bfff6477cc4985c483

        SHA1

        f7ffbb4cbfdd1064e87bba710ca230389b180b9b

        SHA256

        0f4f9f3080a603d52e9f8eb0cc899c152602bf3402aba9c996c61d757b07b64c

        SHA512

        b27c273a536ed702ab47c37981508d9059d1a9cbdeb8cee9a58141c3cf76454d999a23dbf59445fc01d3713f832085277168a1da65651a8f78c7758b6321628e

      • C:\SurrogateBroker\crtCommon.exe

        Filesize

        1.8MB

        MD5

        b8f8339599b59bb50e3da14c35eb3522

        SHA1

        b945a6989385bda8ff50502fc16ac6a78919c304

        SHA256

        e66daf4326469fedb93e1dac80b21218822885b460dcd5e2bcc2735cf4494955

        SHA512

        4456056f633e812200d2f13b58e698c0d8e2fd146880629600f5e69d21b4fc4822820331717b747af9f449cb9f31e69b7e3f4a9f7f584861b440f2d7b8eecad6

      • C:\SurrogateBroker\o4sZ7CSxS8G8o846TWeqd2QBw2.bat

        Filesize

        79B

        MD5

        8282f62b782d639ece324e590c34e3b4

        SHA1

        f045ce5b289d40bb09343693ee1b8203e4c01ef0

        SHA256

        a09fbd6fea0c4a09c191e714a2bd3802b56cea01622e5a110587668c46f150b7

        SHA512

        a0cedb6106bf25f8737cdb9407c44fd4c09d5054e4eb453b3789b7acae6e26751376cc1ee9c04a5e2f13ae70ef24581262839d68849492dae8a1d23c7d39fba4

      • C:\Users\Admin\AppData\Local\Temp\AexqHVCTb1.bat

        Filesize

        191B

        MD5

        5e1a1f758141bd6563b69d067efed734

        SHA1

        ef8277557538f0c576ec932bc086c89a9c66a13b

        SHA256

        51ae4845523af8153dd5a14c120373b1f7340d8f45cd543e97ebb4e567460ad0

        SHA512

        5c7038249631555a7697dc97a64dd160ccec76f300a3cff7c27369256c6bb5a6fda0ff4e3dac0e0ebf7a980706083edbb64ed4cd74cdff6332569a17006ac553

      • C:\Users\Admin\AppData\Local\Temp\RESDE6.tmp

        Filesize

        1KB

        MD5

        e904eea84c64b9f02e2200108b620f10

        SHA1

        3883585cfdd911afb5828060431a80c424ad4c01

        SHA256

        b9e0a549a293925866cf45375649696ffdf20f18a7a433db9fbeb3f0b6209313

        SHA512

        0cb7884d3bc4ec1b95ed47c1efd1c947098c1161883d4276146bf96963f51ff49a4d40ea0e40567079779442b4b8e7aa452410597a6e96aee74b234460dfb7ca

      • \??\c:\Users\Admin\AppData\Local\Temp\0jac43bu\0jac43bu.0.cs

        Filesize

        397B

        MD5

        cd41e260a4981af8bcdaeb130f70477c

        SHA1

        e7d41dd7ba85c8d65a131394619795ad479c4275

        SHA256

        507abd0334ad63d83393e1b314e068a4d4ac7630444575c108782ff00dfe4b6e

        SHA512

        dc3a301e416baab0b9917fafdf344e0fb2e0105d68da9cd6d60446a974d81ab125db87c8b1df48074eb2b3126e9ac31b0a242afcaddb0b9cc9a913df7bf1674e

      • \??\c:\Users\Admin\AppData\Local\Temp\0jac43bu\0jac43bu.cmdline

        Filesize

        235B

        MD5

        5877ab88e5cdb902305c5848bf2071df

        SHA1

        0e893633f2d4feb0c47f0cf630089a32d3bb23eb

        SHA256

        60dfe82bdb1e4f6cb629e918a80f609ec9f550840656631530ae1825ccac474e

        SHA512

        e1858ba73356df333db9e74a3860610fc3b7b8acce1aa8f238e806ac30464a9f29c77f9b82224250ad989d4322ac262eaa9caf99fb8852536e9e143baaf07638

      • \??\c:\Windows\System32\CSC74F43F45D55344A0817EF829927C4C8.TMP

        Filesize

        1KB

        MD5

        0f37e03cd32ff163eb3c300b5d572049

        SHA1

        e3f2b27901d597e93d54a501a5177f0a4c7c79e8

        SHA256

        7f334ea7247b02eaa85b4ab1e9ce73fa4dc153c0c58ad370a76613d086d979d9

        SHA512

        f24a0555965787dccb418350e1281af4181ea3c698375c0ce9c741cc0cdd4281f24c959cae526a44889f3186305a3f35fc0cb9895cc41715c14f528358a71bd1

      • memory/4204-17-0x000000001B730000-0x000000001B74C000-memory.dmp

        Filesize

        112KB

      • memory/4204-22-0x0000000002D10000-0x0000000002D1C000-memory.dmp

        Filesize

        48KB

      • memory/4204-20-0x000000001BA60000-0x000000001BA78000-memory.dmp

        Filesize

        96KB

      • memory/4204-18-0x000000001BAB0000-0x000000001BB00000-memory.dmp

        Filesize

        320KB

      • memory/4204-15-0x0000000002CC0000-0x0000000002CCE000-memory.dmp

        Filesize

        56KB

      • memory/4204-13-0x0000000000920000-0x0000000000AFA000-memory.dmp

        Filesize

        1.9MB

      • memory/4204-12-0x00007FFACB513000-0x00007FFACB515000-memory.dmp

        Filesize

        8KB