Analysis

  • max time kernel
    150s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    22-05-2024 18:55

General

  • Target

    b4b999d8f3fb923a4d4cd17b173ba8474c698443430fdc63b8da6ad6eae57d50.exe

  • Size

    269KB

  • MD5

    c019e19af0d4a7b3c4c51f45c50c7d9f

  • SHA1

    ea0f9c0365bbc8aa19f43556c5552657d218af8c

  • SHA256

    b4b999d8f3fb923a4d4cd17b173ba8474c698443430fdc63b8da6ad6eae57d50

  • SHA512

    eb6ee1e040b6b593d60d5f4cacfdbd7db65977789a3035ab1640afd9aa2f2be055137289100f91a8e2b85156124b157ef5d4435bae4d9893c24277542699494d

  • SSDEEP

    3072:VjT/e0ctZI6461YHBe6Itf1/iTY6ce6pn++RcNLkBHgDK6gpRnUuEeAg0FujD7zO:VjxctlMQMY6Vo++E0R6gFAOfLh6zd35

Malware Config

Extracted

Family

smokeloader

Version

2022

C2

http://77.91.68.29/fks/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Suspicious use of SetThreadContext 1 IoCs
  • Program crash 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 14 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\b4b999d8f3fb923a4d4cd17b173ba8474c698443430fdc63b8da6ad6eae57d50.exe
    "C:\Users\Admin\AppData\Local\Temp\b4b999d8f3fb923a4d4cd17b173ba8474c698443430fdc63b8da6ad6eae57d50.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1760
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:2604
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1760 -s 92
      2⤵
      • Program crash
      PID:3024

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/1200-5-0x0000000002AB0000-0x0000000002AC6000-memory.dmp

    Filesize

    88KB

  • memory/2604-0-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/2604-3-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/2604-2-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

    Filesize

    4KB

  • memory/2604-1-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/2604-4-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/2604-6-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB