Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-02-2024 08:40

General

  • Target

    a3593e1bb1cbff5e24dfe2c56cf49a8d.exe

  • Size

    863KB

  • MD5

    a3593e1bb1cbff5e24dfe2c56cf49a8d

  • SHA1

    631958481f0565176351295df0bfaea81f139c60

  • SHA256

    e064534d97cf20ede110465c290e99afad30967d8556775796a3a04203f48fec

  • SHA512

    70c92f024236d0aaf5549d10558ccb0c1f3a21761f0bf3506473c36e9e49a613aa838c5b53469b3573b130697b3613e1d4d4d3fd78fd9bb05b7e9d1b34772976

  • SSDEEP

    12288:l4lsXvtCcmVVXzzn4PJAahPl/QEdIMiVbHydEIJnJWUgaT7ddRq9MmCS:l4lavt0LkLL9IMixoEgea/HRq9MmCS

Malware Config

Signatures

  • UAC bypass 3 TTPs 2 IoCs
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a3593e1bb1cbff5e24dfe2c56cf49a8d.exe
    "C:\Users\Admin\AppData\Local\Temp\a3593e1bb1cbff5e24dfe2c56cf49a8d.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Checks whether UAC is enabled
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1992
    • C:\Users\Admin\AppData\Local\Temp\5341\5341.exe
      "C:\Users\Admin\AppData\Local\Temp\5341\5341.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4256
      • C:\Users\Admin\AppData\Local\Temp\server.exe
        "C:\Users\Admin\AppData\Local\Temp\server.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1972
        • C:\Windows\SysWOW64\netsh.exe
          netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
          4⤵
          • Modifies Windows Firewall
          PID:4076

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\5341\5341.exe

    Filesize

    23KB

    MD5

    2c658b294b94ada8f4ccf02e4c682ade

    SHA1

    9f5393f9f374199070f0ad15ae17426d414053d4

    SHA256

    32435ea75fdd3b309051fc45ec5c3ef5b1768791f5421ea25c7fd85b38496337

    SHA512

    d8991a605721ce3adaedb8aa40b29858d8c5fa0cc8b74fb3a0e997bfa5e73629822a03c438bcc903cfb4df01eb59293a7e4b9332c28cfc3f5af7ccdec8123d52

  • memory/1972-22-0x0000000073630000-0x0000000073BE1000-memory.dmp

    Filesize

    5.7MB

  • memory/1972-23-0x0000000001110000-0x0000000001120000-memory.dmp

    Filesize

    64KB

  • memory/1972-24-0x0000000073630000-0x0000000073BE1000-memory.dmp

    Filesize

    5.7MB

  • memory/1972-25-0x0000000073630000-0x0000000073BE1000-memory.dmp

    Filesize

    5.7MB

  • memory/1972-26-0x0000000001110000-0x0000000001120000-memory.dmp

    Filesize

    64KB

  • memory/4256-9-0x0000000073630000-0x0000000073BE1000-memory.dmp

    Filesize

    5.7MB

  • memory/4256-10-0x0000000000D40000-0x0000000000D50000-memory.dmp

    Filesize

    64KB

  • memory/4256-11-0x0000000073630000-0x0000000073BE1000-memory.dmp

    Filesize

    5.7MB

  • memory/4256-21-0x0000000073630000-0x0000000073BE1000-memory.dmp

    Filesize

    5.7MB