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Analysis

  • max time kernel
    130s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250217-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/02/2025, 17:06

General

  • Target

    SeroXenBoost.exe

  • Size

    44KB

  • MD5

    8005773f97e8f5c44e2f12eab0141cc5

  • SHA1

    c751dde5b44d985eebaeb9dc027867a9049d4d07

  • SHA256

    0902f1d84a1c4ae0bd2c0dbb029240487332655a0d7ea5106013b7a2590b519b

  • SHA512

    2e6b9cff1f281e4a3ce14c879349caf1794b465de48af9bd9e6fee28c75119546872a948b381d248ad46baae6b52a046a9df7ec865fb24df77cd05d9a2639e05

  • SSDEEP

    768:9V2VRlzVhpvH2VNZZKkVnnn9tF6WRUT0dT9ws+be/1B6SNSlvrz/BB+l:9VGmfHtFBGAZ9gW1omSlH/f+l

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

172.221.202.55:4421

Mutex

SilverMutex_dQhpoXJDyX

Attributes
  • certificate

    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

  • decrypted_key

    -|S.S.S|-

  • discord

    https://discord.com/api/webhooks/1343008288949669961/TCucLQwwnBXuvu4Z6dJ60IcurXSQYorW9CafoG4F4z55ALbW4u2zJa__1PNCU81Kuh4g

  • key

    yy6zDjAUmbB09pKvo5Hhug==

  • key_x509

    UnJEUnNyTmxjY1FPVFJaUlNYaVl4VWxWREpmS0xj

  • payload_url

    https://g.top4top.io/p_2522c7w8u1.png

  • reconnect_delay

    4

  • server_signature

    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

Signatures

  • SilverRat

    SilverRat is trojan written in C#.

  • Silverrat family
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 27 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 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.

  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe
    "C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4812
    • C:\Windows\System32\attrib.exe
      "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Windows"
      2⤵
      • Sets file to hidden
      • Views/modifies file attributes
      PID:4008
    • C:\Windows\System32\attrib.exe
      "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Windows\$77xdwd.dll.exe"
      2⤵
      • Sets file to hidden
      • Views/modifies file attributes
      PID:2444
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1E31.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2476
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2220
      • C:\Users\Admin\AppData\Roaming\Windows\$77xdwd.dll.exe
        "C:\Users\Admin\AppData\Roaming\Windows\$77xdwd.dll.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2012
        • C:\Windows\SYSTEM32\schtasks.exe
          "schtasks.exe" /query /TN $77xdwd.dll.exe
          4⤵
            PID:4048
          • C:\Windows\SYSTEM32\schtasks.exe
            "schtasks.exe" /Create /SC ONCE /TN "$77xdwd.dll.exe" /TR "C:\Users\Admin\AppData\Roaming\Windows\$77xdwd.dll.exe \"\$77xdwd.dll.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
            4⤵
            • Scheduled Task/Job: Scheduled Task
            PID:2672
          • C:\Windows\SYSTEM32\schtasks.exe
            "schtasks.exe" /query /TN $77xdwd.dll.exe
            4⤵
              PID:4660
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2896

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0ikq4evo.5ms.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Local\Temp\tmp1E31.tmp.bat

        Filesize

        163B

        MD5

        84d20c14b4494dda93c15d0387efefd0

        SHA1

        8442b724a2ac1a6cb904d14467ddf010b5951047

        SHA256

        e85a52d5c8907e866764a5b1d2e007007bb4a1f1e4b73174e6db22c67978ac08

        SHA512

        1450558f8fb1defdfefc025f0657b0c7f486e387ad1ef016be036994951f24cca2d6e268eeb3ecc567bfce83ef356955a23bc736f8a2eb6237889c3dd9bcf992

      • C:\Users\Admin\AppData\Roaming\Windows\$77xdwd.dll.exe

        Filesize

        44KB

        MD5

        8005773f97e8f5c44e2f12eab0141cc5

        SHA1

        c751dde5b44d985eebaeb9dc027867a9049d4d07

        SHA256

        0902f1d84a1c4ae0bd2c0dbb029240487332655a0d7ea5106013b7a2590b519b

        SHA512

        2e6b9cff1f281e4a3ce14c879349caf1794b465de48af9bd9e6fee28c75119546872a948b381d248ad46baae6b52a046a9df7ec865fb24df77cd05d9a2639e05

      • memory/2012-13-0x00007FFC476F0000-0x00007FFC481B1000-memory.dmp

        Filesize

        10.8MB

      • memory/2012-26-0x00007FFC476F0000-0x00007FFC481B1000-memory.dmp

        Filesize

        10.8MB

      • memory/2896-23-0x0000028C39110000-0x0000028C39132000-memory.dmp

        Filesize

        136KB

      • memory/4812-0-0x00007FFC476F3000-0x00007FFC476F5000-memory.dmp

        Filesize

        8KB

      • memory/4812-1-0x0000000000C80000-0x0000000000C90000-memory.dmp

        Filesize

        64KB

      • memory/4812-2-0x00007FFC476F0000-0x00007FFC481B1000-memory.dmp

        Filesize

        10.8MB

      • memory/4812-3-0x00007FFC476F0000-0x00007FFC481B1000-memory.dmp

        Filesize

        10.8MB

      • memory/4812-9-0x00007FFC476F0000-0x00007FFC481B1000-memory.dmp

        Filesize

        10.8MB