Analysis

  • max time kernel
    146s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/04/2024, 12:11

General

  • Target

    agent64.exe

  • Size

    3.1MB

  • MD5

    488550eeb4ae87c8f9510e04e222261d

  • SHA1

    18c1785375af65ec82a161d13354656282412803

  • SHA256

    6f4dd3d2ea6b1310b9c9e2063aba85396ea82e63f777a5dd5b42dac67c0ae630

  • SHA512

    4ea8274a28e8ee68633b5ebd07e68916d80d9d807ee62c3700f9cfb5bd990ba6c88b8ac7bdac893964139ea9a949a2ee092334d45b48fbe590c1345ada594514

  • SSDEEP

    49152:fvSI22SsaNYfdPBldt698dBcjHslRJ6sbR3LoGd5/THHB72eh2NT:fv/22SsaNYfdPBldt6+dBcjHslRJ62

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

God

C2

88.209.197.253:4782

Mutex

5b9901b6-5e69-4eaa-a9f2-55ce43b72785

Attributes
  • encryption_key

    CEAEA9FD2F3E18352164BB4D9A6F56EFF5E2D896

  • install_name

    COM Surrogate.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Update

  • subdirectory

    System32

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\agent64.exe
    "C:\Users\Admin\AppData\Local\Temp\agent64.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3332
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\System32\COM Surrogate.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:1448
    • C:\Users\Admin\AppData\Roaming\System32\COM Surrogate.exe
      "C:\Users\Admin\AppData\Roaming\System32\COM Surrogate.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:812
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\System32\COM Surrogate.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:4504

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\System32\COM Surrogate.exe

    Filesize

    3.1MB

    MD5

    488550eeb4ae87c8f9510e04e222261d

    SHA1

    18c1785375af65ec82a161d13354656282412803

    SHA256

    6f4dd3d2ea6b1310b9c9e2063aba85396ea82e63f777a5dd5b42dac67c0ae630

    SHA512

    4ea8274a28e8ee68633b5ebd07e68916d80d9d807ee62c3700f9cfb5bd990ba6c88b8ac7bdac893964139ea9a949a2ee092334d45b48fbe590c1345ada594514

  • memory/812-9-0x00007FF97ED70000-0x00007FF97F831000-memory.dmp

    Filesize

    10.8MB

  • memory/812-11-0x0000000002D40000-0x0000000002D50000-memory.dmp

    Filesize

    64KB

  • memory/812-12-0x000000001BF40000-0x000000001BF90000-memory.dmp

    Filesize

    320KB

  • memory/812-13-0x000000001C050000-0x000000001C102000-memory.dmp

    Filesize

    712KB

  • memory/812-14-0x00007FF97ED70000-0x00007FF97F831000-memory.dmp

    Filesize

    10.8MB

  • memory/812-15-0x0000000002D40000-0x0000000002D50000-memory.dmp

    Filesize

    64KB

  • memory/3332-0-0x0000000000BD0000-0x0000000000EF4000-memory.dmp

    Filesize

    3.1MB

  • memory/3332-1-0x00007FF97ED70000-0x00007FF97F831000-memory.dmp

    Filesize

    10.8MB

  • memory/3332-2-0x0000000003140000-0x0000000003150000-memory.dmp

    Filesize

    64KB

  • memory/3332-10-0x00007FF97ED70000-0x00007FF97F831000-memory.dmp

    Filesize

    10.8MB