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Analysis

  • max time kernel
    16s
  • max time network
    23s
  • 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, 16:59

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 1 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs
  • 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
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2952
    • 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:316
    • 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:4948

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/2952-0-0x00007FFBDE523000-0x00007FFBDE525000-memory.dmp

    Filesize

    8KB

  • memory/2952-1-0x0000000000B20000-0x0000000000B30000-memory.dmp

    Filesize

    64KB

  • memory/2952-2-0x00007FFBDE520000-0x00007FFBDEFE1000-memory.dmp

    Filesize

    10.8MB

  • memory/2952-3-0x00007FFBDE523000-0x00007FFBDE525000-memory.dmp

    Filesize

    8KB

  • memory/2952-4-0x00007FFBDE520000-0x00007FFBDEFE1000-memory.dmp

    Filesize

    10.8MB