Resubmissions

25/09/2023, 03:27

230925-dzw25adc74 10

25/09/2023, 01:41

230925-b3534abc2w 10

Analysis

  • max time kernel
    301s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    25/09/2023, 01:41

General

  • Target

    b050634379fc9cac5dbfdfc606040c7bc366c511c12044aa649f508816ce45b9.exe

  • Size

    239KB

  • MD5

    751a173de4c3d8ad83c925d5edcd7505

  • SHA1

    9b081b970832e64fa8a2ee82a54d824346cb9272

  • SHA256

    b050634379fc9cac5dbfdfc606040c7bc366c511c12044aa649f508816ce45b9

  • SHA512

    068305877ffb53f619c0132bb28362cc058fd8024f970435c43ef93d59604011ae4d7a7f38276eb724bcbde872c9869c1a56f5afaa3a8820889879a8d73e12ef

  • SSDEEP

    6144:kM46fuYXChoQTjlFgLuCY1dRuAOi0y1R7w8y0:kVYzXChdTbv1buI1R7w8y

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: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b050634379fc9cac5dbfdfc606040c7bc366c511c12044aa649f508816ce45b9.exe
    "C:\Users\Admin\AppData\Local\Temp\b050634379fc9cac5dbfdfc606040c7bc366c511c12044aa649f508816ce45b9.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2276
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
      2⤵
        PID:3052
      • 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:2780
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2276 -s 60
        2⤵
        • Program crash
        PID:1036

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • memory/1196-5-0x0000000002150000-0x0000000002166000-memory.dmp

            Filesize

            88KB

          • memory/2780-0-0x0000000000400000-0x0000000000409000-memory.dmp

            Filesize

            36KB

          • memory/2780-1-0x0000000000400000-0x0000000000409000-memory.dmp

            Filesize

            36KB

          • memory/2780-3-0x0000000000400000-0x0000000000409000-memory.dmp

            Filesize

            36KB

          • memory/2780-2-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

            Filesize

            4KB

          • memory/2780-4-0x0000000000400000-0x0000000000409000-memory.dmp

            Filesize

            36KB

          • memory/2780-6-0x0000000000400000-0x0000000000409000-memory.dmp

            Filesize

            36KB