Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/09/2023, 15:56

General

  • Target

    82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe

  • Size

    186KB

  • MD5

    c1f257065788ec87d854c19262f60e2d

  • SHA1

    d6f451114cc0a397b8e4ec8fa656ea167f1ed42d

  • SHA256

    82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08

  • SHA512

    6557a074a6e646d11b0dcb0d438ff2b819f32c47e9a0d761dcdbe973c8235702221a5b384a7b5a1c75c97f974ba51dab58d9216a3c779cc7ead436b79b8f6343

  • SSDEEP

    3072:mr0mAdMFyW1OA71gAeS+u2QkPK0OPCHIIpvd51QnNtz:mxAdMFyW1ORAeS+ZQkfwOIKdQ

Malware Config

Extracted

Family

smokeloader

Botnet

pub1

Extracted

Family

smokeloader

Version

2020

C2

http://host-file-host6.com/

http://host-host-file8.com/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Executes dropped EXE 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Checks SCSI registry key(s) 3 TTPs 6 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 12 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\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe
    "C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2224
    • C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe
      "C:\Users\Admin\AppData\Local\Temp\82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:972
  • C:\Users\Admin\AppData\Roaming\bfcrcbi
    C:\Users\Admin\AppData\Roaming\bfcrcbi
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4992
    • C:\Users\Admin\AppData\Roaming\bfcrcbi
      C:\Users\Admin\AppData\Roaming\bfcrcbi
      2⤵
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious behavior: MapViewOfSection
      PID:1808

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Roaming\bfcrcbi

          Filesize

          186KB

          MD5

          c1f257065788ec87d854c19262f60e2d

          SHA1

          d6f451114cc0a397b8e4ec8fa656ea167f1ed42d

          SHA256

          82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08

          SHA512

          6557a074a6e646d11b0dcb0d438ff2b819f32c47e9a0d761dcdbe973c8235702221a5b384a7b5a1c75c97f974ba51dab58d9216a3c779cc7ead436b79b8f6343

        • C:\Users\Admin\AppData\Roaming\bfcrcbi

          Filesize

          186KB

          MD5

          c1f257065788ec87d854c19262f60e2d

          SHA1

          d6f451114cc0a397b8e4ec8fa656ea167f1ed42d

          SHA256

          82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08

          SHA512

          6557a074a6e646d11b0dcb0d438ff2b819f32c47e9a0d761dcdbe973c8235702221a5b384a7b5a1c75c97f974ba51dab58d9216a3c779cc7ead436b79b8f6343

        • C:\Users\Admin\AppData\Roaming\bfcrcbi

          Filesize

          186KB

          MD5

          c1f257065788ec87d854c19262f60e2d

          SHA1

          d6f451114cc0a397b8e4ec8fa656ea167f1ed42d

          SHA256

          82a134920474a148dffde34ac05d858980f8e2b702c9195e961b0446dbf3eb08

          SHA512

          6557a074a6e646d11b0dcb0d438ff2b819f32c47e9a0d761dcdbe973c8235702221a5b384a7b5a1c75c97f974ba51dab58d9216a3c779cc7ead436b79b8f6343

        • memory/972-2-0x0000000000400000-0x0000000000409000-memory.dmp

          Filesize

          36KB

        • memory/972-3-0x0000000000400000-0x0000000000409000-memory.dmp

          Filesize

          36KB

        • memory/972-6-0x0000000000400000-0x0000000000409000-memory.dmp

          Filesize

          36KB

        • memory/1808-21-0x0000000000400000-0x0000000000409000-memory.dmp

          Filesize

          36KB

        • memory/1808-17-0x0000000000400000-0x0000000000409000-memory.dmp

          Filesize

          36KB

        • memory/2224-4-0x00000000005B0000-0x00000000005C5000-memory.dmp

          Filesize

          84KB

        • memory/2224-0-0x00000000005B0000-0x00000000005C5000-memory.dmp

          Filesize

          84KB

        • memory/2224-1-0x00000000005D0000-0x00000000005D9000-memory.dmp

          Filesize

          36KB

        • memory/3116-5-0x00000000008B0000-0x00000000008C6000-memory.dmp

          Filesize

          88KB

        • memory/3116-18-0x00000000008D0000-0x00000000008E6000-memory.dmp

          Filesize

          88KB