Analysis

  • max time kernel
    839s
  • max time network
    877s
  • platform
    windows7_x64
  • resource
    win7-20241010-ja
  • resource tags

    arch:x64arch:x86image:win7-20241010-jalocale:ja-jpos:windows7-x64systemwindows
  • submitted
    08/03/2025, 19:58

General

  • Target

    BOB SILVER CLIENTS GO BRRRRR/V 13.exe

  • Size

    45KB

  • MD5

    1cf8d6e0acaa084d9b4201f11a1a04a8

  • SHA1

    7cc576ff7a096e14a6e83836bfd3cd29f7164392

  • SHA256

    c7c78f431c21c05d2963fb7635b73d969b7dada294252ef1d2b634b030a2375f

  • SHA512

    de6889cffba397b9a95b02d3271b14c9abbe543fb2a4415182cb24e9a3cf152bfb1ae5d3237eacac613f411fc278d120191f45c5cb1c4ca5135f393b57c0527a

  • SSDEEP

    768:iqzAMCV2799XtzcyyMjtjRULQD9PpnUz1QB6S9RVvr0/bE:iqzAM8qfzcMjGsD9K1QoyRVA/bE

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

if-eventually.gl.at.ply.gg:17094

Mutex

lAxDBRhAFu

Attributes
  • certificate

    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

  • decrypted_key

    -|S.S.S|-

  • discord

    https://discord.com/api/webhooks/1335679503938355221/lGcOUDspps04wapqxq013W8uYGPSCcmnxl9Q1xnWdBn45Ul8QBT-Qs2mjsdVNXfOtTCe

  • key

    yy6zDjAUmbB09pKvo5Hhug==

  • key_x509

    b0FGeVZNcFRMWVloVHR6Z0VESU5RdlpZUmxZbUFE

  • 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.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 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
  • Modifies system certificate store 2 TTPs 4 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 30 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.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\BOB SILVER CLIENTS GO BRRRRR\V 13.exe
    "C:\Users\Admin\AppData\Local\Temp\BOB SILVER CLIENTS GO BRRRRR\V 13.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2872
    • C:\Windows\System32\attrib.exe
      "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\WinTask"
      2⤵
      • Sets file to hidden
      • Views/modifies file attributes
      PID:2964
    • C:\Windows\System32\attrib.exe
      "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\WinTask\$77Runtime Broker.exe"
      2⤵
      • Sets file to hidden
      • Views/modifies file attributes
      PID:2688
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp61FE.tmp.bat""
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2428
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:312
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\WinTask\$77Runtime Broker.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\WinTask\$77Runtime Broker.exe"
        3⤵
        • Executes dropped EXE
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2504
        • C:\Windows\system32\schtasks.exe
          "schtasks.exe" /query /TN $77Runtime Broker.exe
          4⤵
            PID:2348
          • C:\Windows\system32\schtasks.exe
            "schtasks.exe" /Create /SC ONCE /TN "$77Runtime Broker.exe" /TR "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\WinTask\$77Runtime Broker.exe \"\$77Runtime Broker.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
            4⤵
            • Scheduled Task/Job: Scheduled Task
            PID:1584
          • C:\Windows\system32\schtasks.exe
            "schtasks.exe" /query /TN $77Runtime Broker.exe
            4⤵
              PID:2460
            • 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:2488
            • C:\Windows\System32\schtasks.exe
              "C:\Windows\System32\schtasks.exe" /create /sc hourly /mo 1 /tn "Runtime Broker_Task-HOURLY-01" /tr "%MyFile%" /st 00:00
              4⤵
              • Scheduled Task/Job: Scheduled Task
              PID:2980
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2952
      • C:\Windows\system32\taskeng.exe
        taskeng.exe {1C65A5BA-BD11-436D-BB66-455F4A74634A} S-1-5-21-2039016743-699959520-214465309-1000:PIDEURYY\Admin:Interactive:[1]
        1⤵
          PID:2284

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp61FE.tmp.bat

          Filesize

          197B

          MD5

          1ddebd0d66cde7116a431cbbb58e94a7

          SHA1

          84f5c832abb0e69cc0776baf81a73cb37c517dd5

          SHA256

          58c13d8d8a019d725ed90f239ec59dd354f7776314d400091984ebdca10e557f

          SHA512

          7d24321976e48f6a17b5a7b99b5550d51a9c323a23888f81037c95dc1f227faa687f01e38cb18e7b5e64f81bc127d79cb4ec4707336a88389126e309259a54ff

        • \Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\WinTask\$77Runtime Broker.exe

          Filesize

          45KB

          MD5

          1cf8d6e0acaa084d9b4201f11a1a04a8

          SHA1

          7cc576ff7a096e14a6e83836bfd3cd29f7164392

          SHA256

          c7c78f431c21c05d2963fb7635b73d969b7dada294252ef1d2b634b030a2375f

          SHA512

          de6889cffba397b9a95b02d3271b14c9abbe543fb2a4415182cb24e9a3cf152bfb1ae5d3237eacac613f411fc278d120191f45c5cb1c4ca5135f393b57c0527a

        • memory/2488-24-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

          Filesize

          2.9MB

        • memory/2488-30-0x000000001BDB0000-0x000000001BE08000-memory.dmp

          Filesize

          352KB

        • memory/2488-29-0x0000000002DC0000-0x0000000002DC8000-memory.dmp

          Filesize

          32KB

        • memory/2488-28-0x0000000002C90000-0x0000000002C9A000-memory.dmp

          Filesize

          40KB

        • memory/2488-27-0x000000001B550000-0x000000001B5A0000-memory.dmp

          Filesize

          320KB

        • memory/2488-26-0x0000000002C70000-0x0000000002C80000-memory.dmp

          Filesize

          64KB

        • memory/2488-25-0x0000000002960000-0x0000000002968000-memory.dmp

          Filesize

          32KB

        • memory/2504-19-0x000000013FD90000-0x000000013FDA0000-memory.dmp

          Filesize

          64KB

        • memory/2872-0-0x000007FEF5B03000-0x000007FEF5B04000-memory.dmp

          Filesize

          4KB

        • memory/2872-14-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2872-4-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2872-3-0x000007FEF5B03000-0x000007FEF5B04000-memory.dmp

          Filesize

          4KB

        • memory/2872-2-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

          Filesize

          9.9MB

        • memory/2872-1-0x000000013FAF0000-0x000000013FB00000-memory.dmp

          Filesize

          64KB