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Analysis

  • max time kernel
    152s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231127-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/12/2023, 07:09

General

  • Target

    4uZ060Ph.exe

  • Size

    37KB

  • MD5

    8837a89b82d0d3b0259cc9f47b2e599b

  • SHA1

    51dd86a6a717a8f1470fff7a65f96c983aa71f09

  • SHA256

    ad5c98936429f847e6808a4efdb80faf452a5c5c31d91f9f7de2560e51478701

  • SHA512

    4a6c660c78bc99916d68978243f1140203a5805a3a7ae7a1749c609bd5aaf06b9ac253c09c0a206acdb832b45bc1ab700a5beb98024131779a45c70b53c7bc71

  • SSDEEP

    768:d8n3N4JRqwg8UTB+8zx70f0PSuopLwlFFWO7:dmN4JRrg8ypxSKFFX

Malware Config

Extracted

Family

smokeloader

Version

2022

C2

http://81.19.131.34/fks/index.php

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Downloads MZ/PE file
  • Deletes itself 1 IoCs
  • Executes dropped EXE 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: MapViewOfSection 2 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 3 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\4uZ060Ph.exe
    "C:\Users\Admin\AppData\Local\Temp\4uZ060Ph.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:3924
  • C:\Users\Admin\AppData\Local\Temp\61E2.exe
    C:\Users\Admin\AppData\Local\Temp\61E2.exe
    1⤵
    • Executes dropped EXE
    PID:1056
  • C:\Users\Admin\AppData\Roaming\jivtsbh
    C:\Users\Admin\AppData\Roaming\jivtsbh
    1⤵
    • Executes dropped EXE
    • Checks SCSI registry key(s)
    • Suspicious behavior: MapViewOfSection
    PID:1644

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\61E2.exe

    Filesize

    401KB

    MD5

    f88edad62a7789c2c5d8047133da5fa7

    SHA1

    41b1f056cdda764a1c7c402c6fa4f8ab2f3ce5f9

    SHA256

    eb2b1ce5574096b91eb9e0482117d2518ab188c0747a209dc77e88d30bb970dc

    SHA512

    e2d5b0ace5dfd3bd2321b2a42b7e7725071ca440389dc5ef12720a34727ae84c2907cd7befeae5d53568d9deaee8443f4cbda44b598cfc9b6316d9389be09a60

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

    Filesize

    37KB

    MD5

    8837a89b82d0d3b0259cc9f47b2e599b

    SHA1

    51dd86a6a717a8f1470fff7a65f96c983aa71f09

    SHA256

    ad5c98936429f847e6808a4efdb80faf452a5c5c31d91f9f7de2560e51478701

    SHA512

    4a6c660c78bc99916d68978243f1140203a5805a3a7ae7a1749c609bd5aaf06b9ac253c09c0a206acdb832b45bc1ab700a5beb98024131779a45c70b53c7bc71

  • memory/1644-17-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/3312-1-0x0000000002F90000-0x0000000002FA6000-memory.dmp

    Filesize

    88KB

  • memory/3312-14-0x0000000002D90000-0x0000000002DA6000-memory.dmp

    Filesize

    88KB

  • memory/3924-0-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/3924-3-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB