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Analysis

  • max time kernel
    94s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/11/2024, 21:28

General

  • Target

    753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe

  • Size

    45KB

  • MD5

    7be4b0b2f700401c020e936fcbb55f52

  • SHA1

    9fdc76da221ea52120cf79b6491a55a40c019de3

  • SHA256

    753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f

  • SHA512

    30e2d2d591370a82c20f5886f7d0c799a4f11b1c9de0de0c354787afb57b4a3f7351d182334ddcd971b37f5fcec3dc262e5810eb24f3014595d9da82d4f9219d

  • SSDEEP

    768:fWHoI5XPDHzT8d7tGjOr1IS72G5JBCASbBRUT0h9SGQ889LWrB6SSe7vrQ/HNHy:fW5k7tGU1vljSVGAh9189LWroFe7M/Hc

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

109.120.138.220:9999

Mutex

SilverMutex_eFDAYafReG

Attributes
  • certificate

    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

  • decrypted_key

    -|S.S.S|-

  • discord

    https://discord.com/api/webhooks/1306009594367180840/Zg6W2rH_yPNkl7Hn5Z-GWjtm8W94xN_PzceHo8g5RjjoNr4vkRdq1c70arvb91az-VPT

  • key

    yy6zDjAUmbB09pKvo5Hhug==

  • key_x509

    QVR3SE5ZVndSU29kUlRqb0RrYVFEenVZQ3pacUJF

  • 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 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.

  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
    "C:\Users\Admin\AppData\Local\Temp\753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1028
    • C:\Windows\System32\attrib.exe
      "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles"
      2⤵
      • Sets file to hidden
      • Views/modifies file attributes
      PID:3436
    • C:\Windows\System32\attrib.exe
      "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles\$77helppanel.exe"
      2⤵
      • Sets file to hidden
      • Views/modifies file attributes
      PID:5000
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCC49.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2240
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2720
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles\$77helppanel.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles\$77helppanel.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:4712
        • C:\Windows\SYSTEM32\schtasks.exe
          "schtasks.exe" /query /TN $77helppanel.exe
          4⤵
            PID:2952
          • C:\Windows\SYSTEM32\schtasks.exe
            "schtasks.exe" /Create /SC ONCE /TN "$77helppanel.exe" /TR "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles\$77helppanel.exe \"\$77helppanel.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
            4⤵
            • Scheduled Task/Job: Scheduled Task
            PID:1396
          • C:\Windows\SYSTEM32\schtasks.exe
            "schtasks.exe" /query /TN $77helppanel.exe
            4⤵
              PID:1056
            • 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:4404
            • C:\Windows\System32\schtasks.exe
              "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "helppanel_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
              4⤵
              • Scheduled Task/Job: Scheduled Task
              PID:2008

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_12jxvpx5.hp1.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Local\Temp\tmpCC49.tmp.bat

        Filesize

        200B

        MD5

        ec0d92ab69b9e55ed969a776408de7e9

        SHA1

        858c2811e5369547a9cb4e136dbb2c5de3167d93

        SHA256

        c4fffe9d2a17f440198a89a59d3c1d99e0ff87c666af1abda7eff46894df699a

        SHA512

        ec41ed3c883dc345f8ed91f68cdcf18239f055ff79dc616e4d9cf34b9b5e290fe6e540203b1594d275e104d3d3a0ea79647cd191ab9e3b605136b872ced15e08

      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles\$77helppanel.exe

        Filesize

        45KB

        MD5

        7be4b0b2f700401c020e936fcbb55f52

        SHA1

        9fdc76da221ea52120cf79b6491a55a40c019de3

        SHA256

        753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f

        SHA512

        30e2d2d591370a82c20f5886f7d0c799a4f11b1c9de0de0c354787afb57b4a3f7351d182334ddcd971b37f5fcec3dc262e5810eb24f3014595d9da82d4f9219d

      • memory/1028-0-0x00007FF8E2C43000-0x00007FF8E2C45000-memory.dmp

        Filesize

        8KB

      • memory/1028-1-0x00000000001F0000-0x0000000000200000-memory.dmp

        Filesize

        64KB

      • memory/1028-2-0x00007FF8E2C40000-0x00007FF8E3701000-memory.dmp

        Filesize

        10.8MB

      • memory/1028-3-0x00007FF8E2C43000-0x00007FF8E2C45000-memory.dmp

        Filesize

        8KB

      • memory/1028-4-0x00007FF8E2C40000-0x00007FF8E3701000-memory.dmp

        Filesize

        10.8MB

      • memory/1028-10-0x00007FF8E2C40000-0x00007FF8E3701000-memory.dmp

        Filesize

        10.8MB

      • memory/4404-15-0x00000239FECA0000-0x00000239FECC2000-memory.dmp

        Filesize

        136KB

      • memory/4712-14-0x00007FF8E2C40000-0x00007FF8E3701000-memory.dmp

        Filesize

        10.8MB

      • memory/4712-29-0x00007FF8E2C40000-0x00007FF8E3701000-memory.dmp

        Filesize

        10.8MB