Analysis

  • max time kernel
    150s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250314-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/04/2025, 02:20

General

  • Target

    2025-04-01_f1795a8e111b967491cefe7438f38267_black-basta_icedid_luca-stealer.exe

  • Size

    21.8MB

  • MD5

    f1795a8e111b967491cefe7438f38267

  • SHA1

    ec6783287f8fba0a53534b88ad027799f054e023

  • SHA256

    3d20d079d777d5c179d709428935d51605d82a8668ac716eb89f8249c46adb8d

  • SHA512

    a70a16730a858bf59f0c18274b2251206ab0136a34237447a3b1fa624c1c19a7ff8c431b7352534d739770d5b9674bd043199d1461584bc9366feaeb2e7014b9

  • SSDEEP

    49152:XciUvXVc5YlG4V5EXHwCC5hDOng6kpicavOafd4+9mNneuEBELEMjFRwV:sislc5YlG4fnzDOnREoQBe

Malware Config

Extracted

Family

valleyrat_s2

Version

1.0

C2

154.39.239.95:1445

Attributes
  • campaign_date

    2025. 3. 5

Signatures

  • UAC bypass 3 TTPs 2 IoCs
  • ValleyRat

    ValleyRat stage2 is a backdoor written in C++.

  • Valleyrat_s2 family
  • Blocklisted process makes network request 21 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 6 IoCs
  • Access Token Manipulation: Create Process with Token 1 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 15 IoCs

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

  • Modifies registry class 8 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 15 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2025-04-01_f1795a8e111b967491cefe7438f38267_black-basta_icedid_luca-stealer.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-04-01_f1795a8e111b967491cefe7438f38267_black-basta_icedid_luca-stealer.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:5096
    • C:\Users\Admin\AppData\Local\Temp\2025-04-01_f1795a8e111b967491cefe7438f38267_black-basta_icedid_luca-stealer.exe
      "C:\Users\Admin\AppData\Local\Temp\2025-04-01_f1795a8e111b967491cefe7438f38267_black-basta_icedid_luca-stealer.exe" 65423587
      2⤵
      • UAC bypass
      • Drops startup file
      • Checks whether UAC is enabled
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:1016
      • C:\Users\Public\WSkOgkc\pYDJFbnxcWxF.exe
        C:\Users\Public\WSkOgkc\pYDJFbnxcWxF.exe 3264511234
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4640
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c C:\Users\Public\WSkOgkc\62310.cmd
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4808
          • C:\Windows\SysWOW64\mshta.exe
            mshta vbscript:createobject("shell.application").shellexecute("C:\Users\Public\WSkOgkc\62310.cmd","::","","runas",0)(window.close)
            5⤵
            • Checks computer location settings
            • Access Token Manipulation: Create Process with Token
            • System Location Discovery: System Language Discovery
            • Modifies registry class
            PID:4952
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /C "C:\Users\Public\WSkOgkc\62310.cmd" ::
              6⤵
              • System Location Discovery: System Language Discovery
              PID:5128
              • C:\Windows\SysWOW64\subst.exe
                subst o: /d
                7⤵
                • System Location Discovery: System Language Discovery
                PID:5900
              • C:\Windows\SysWOW64\reg.exe
                reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
                7⤵
                • UAC bypass
                • System Location Discovery: System Language Discovery
                • Modifies registry key
                PID:5832
              • C:\Windows\SysWOW64\reg.exe
                reg delete "HKLM\SYSTEM\ControlSet001\Control\Session Manager\DOS Devices" /v O: /f
                7⤵
                • System Location Discovery: System Language Discovery
                PID:1956
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe
          4⤵
          • Blocklisted process makes network request
          • System Location Discovery: System Language Discovery
          PID:4848
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe
          4⤵
          • Blocklisted process makes network request
          • System Location Discovery: System Language Discovery
          PID:4932
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe
          4⤵
          • Blocklisted process makes network request
          • System Location Discovery: System Language Discovery
          PID:3568
        • C:\Users\Public\WSkOgkc\asdccx.exe
          C:\Users\Public\WSkOgkc\asdccx.exe
          4⤵
          • Drops startup file
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          PID:5648
        • C:\Users\Public\WSkOgkc\asdccx.exe
          C:\Users\Public\WSkOgkc\asdccx.exe
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:5300
        • C:\Users\Public\WSkOgkc\asdccx.exe
          C:\Users\Public\WSkOgkc\asdccx.exe
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:5004
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5096 -s 1416
      2⤵
      • Program crash
      PID:4532
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 5096 -ip 5096
    1⤵
      PID:2968

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Public\WSkOgkc\62310.cmd

      Filesize

      413B

      MD5

      675e12cfecc9ced36cc924981b0a1637

      SHA1

      6b9ac34248d15b292663593fed704fa8e96aea08

      SHA256

      6f17d3d9e7d5374f11f9bfc1adb0fc53e78cd5861c8272cdc3bac0fe88bfb9c6

      SHA512

      d0507e1781a66846a7f7a046139b07c7176861d7a496ed334918c19bb51d00ae9f683eae9e8e9397f0587e3b26fe8aeb4568f9a39410b00b730288a790ac4c28

    • C:\Users\Public\WSkOgkc\asdccx.exe

      Filesize

      231KB

      MD5

      d0fce3afa6aa1d58ce9fa336cc2b675b

      SHA1

      4048488de6ba4bfef9edf103755519f1f762668f

      SHA256

      4d89fc34d5f0f9babd022271c585a9477bf41e834e46b991deaa0530fdb25e22

      SHA512

      80e127ef81752cd50f9ea2d662dc4d3bf8db8d29680e75fa5fc406ca22cafa5c4d89ef2eac65b486413d3cdd57a2c12a1cb75f65d1e312a717d262265736d1c2

    • C:\Users\Public\WSkOgkc\asvv.txt

      Filesize

      108KB

      MD5

      4cf58cd3bc03c3ced6cc48c5ccf08961

      SHA1

      cfef73a005db72c34fb6f8d98ec29da0641dfd96

      SHA256

      106bc9812d240651c48ced1435ccfd6754808ec17bb57624fe5b737ce447f544

      SHA512

      75e7701d75c91b7b0400ba4ce3f94a07337b6c3b67010714e6a35c491ad7bf7a2c2a75317d4d723c18eded78306443778a6ae381a4dc3afd6636ed526469fa37

    • C:\Users\Public\WSkOgkc\pYDJFbnxcWxF.exe

      Filesize

      21.8MB

      MD5

      f1795a8e111b967491cefe7438f38267

      SHA1

      ec6783287f8fba0a53534b88ad027799f054e023

      SHA256

      3d20d079d777d5c179d709428935d51605d82a8668ac716eb89f8249c46adb8d

      SHA512

      a70a16730a858bf59f0c18274b2251206ab0136a34237447a3b1fa624c1c19a7ff8c431b7352534d739770d5b9674bd043199d1461584bc9366feaeb2e7014b9

    • memory/3568-43-0x0000000000400000-0x0000000000422000-memory.dmp

      Filesize

      136KB

    • memory/3568-44-0x0000000000400000-0x0000000000422000-memory.dmp

      Filesize

      136KB

    • memory/4848-23-0x0000000000400000-0x0000000000422000-memory.dmp

      Filesize

      136KB

    • memory/4848-22-0x0000000000400000-0x0000000000422000-memory.dmp

      Filesize

      136KB

    • memory/4848-26-0x0000000000400000-0x0000000000422000-memory.dmp

      Filesize

      136KB

    • memory/4848-20-0x0000000000400000-0x0000000000422000-memory.dmp

      Filesize

      136KB

    • memory/4848-21-0x0000000000400000-0x0000000000422000-memory.dmp

      Filesize

      136KB

    • memory/4848-24-0x0000000000400000-0x0000000000422000-memory.dmp

      Filesize

      136KB

    • memory/4848-33-0x0000000000400000-0x0000000000422000-memory.dmp

      Filesize

      136KB

    • memory/4932-34-0x0000000000400000-0x0000000000422000-memory.dmp

      Filesize

      136KB

    • memory/4932-35-0x0000000000400000-0x0000000000422000-memory.dmp

      Filesize

      136KB

    • memory/5648-47-0x0000000000400000-0x00000000004F8000-memory.dmp

      Filesize

      992KB

    • memory/5648-46-0x0000000000400000-0x00000000004F8000-memory.dmp

      Filesize

      992KB

    • memory/5648-48-0x0000000000400000-0x00000000004F8000-memory.dmp

      Filesize

      992KB

    • memory/5648-59-0x0000000000400000-0x00000000004F8000-memory.dmp

      Filesize

      992KB

    • memory/5648-45-0x0000000000400000-0x00000000004F8000-memory.dmp

      Filesize

      992KB