Analysis

  • max time kernel
    150s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    22-05-2024 18:18

General

  • Target

    8cae2c42df2dcc0b08b46e91d7ffbdd38e6e53724f0873f0cc05747f396b759a.exe

  • Size

    254KB

  • MD5

    6c76dfb25714e5941d70f7a275e75e5d

  • SHA1

    5ed48c3c57d1abeece0b35d7bb85a6bf71ab385b

  • SHA256

    8cae2c42df2dcc0b08b46e91d7ffbdd38e6e53724f0873f0cc05747f396b759a

  • SHA512

    2aff7b21be560dcfeeafc9f7ed1ab0a1e10ebc2a0363a656e880d05e0c7f20030a8d44926ad72f395632ecd8bf441fe71538c81e7520d73bacf85017ab0f0d97

  • SSDEEP

    3072:gHvq+7xq+eNvu2U1GA0B+t+ieyOR/VCY0rJ25o3BcJTcVVeosbVFlb9eAg0FujDL:gTD2Lr/V90d2WxjV/hAOIKVg/oPGCV

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.

  • Executes dropped EXE 1 IoCs
  • 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 FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8cae2c42df2dcc0b08b46e91d7ffbdd38e6e53724f0873f0cc05747f396b759a.exe
    "C:\Users\Admin\AppData\Local\Temp\8cae2c42df2dcc0b08b46e91d7ffbdd38e6e53724f0873f0cc05747f396b759a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1148
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
      2⤵
        PID:2980
      • 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:3020
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1148 -s 100
        2⤵
        • Program crash
        PID:1524
    • C:\Windows\system32\taskeng.exe
      taskeng.exe {0F5992A8-07DF-47D0-BF4A-4CF9B0B8F77E} S-1-5-21-2248906074-2862704502-246302768-1000:GHPZRGFC\Admin:Interactive:[1]
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1992
      • C:\Users\Admin\AppData\Roaming\utgcsjd
        C:\Users\Admin\AppData\Roaming\utgcsjd
        2⤵
        • Executes dropped EXE
        PID:2788

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      96KB

      MD5

      7825cad99621dd288da81d8d8ae13cf5

      SHA1

      f3e1ab0c8e4f22e718cdeb6fa5faa87b0e61e73c

      SHA256

      529088553fe9cb3e497ef704ce9bc7bc07630f6ddfad44afb92acfe639789ec5

      SHA512

      2e81251a2c140a96f681fa95d82eee531b391e2654daa90da08d1dd00f13cba949136d465a2dc37507d40b4a708b6fc695baa716f19737591b1a89bd2a4b60b4

    • memory/1248-5-0x0000000002D90000-0x0000000002DA6000-memory.dmp

      Filesize

      88KB

    • memory/3020-3-0x0000000000400000-0x0000000000409000-memory.dmp

      Filesize

      36KB

    • memory/3020-2-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

      Filesize

      4KB

    • memory/3020-1-0x0000000000400000-0x0000000000409000-memory.dmp

      Filesize

      36KB

    • memory/3020-0-0x0000000000400000-0x0000000000409000-memory.dmp

      Filesize

      36KB

    • memory/3020-4-0x0000000000400000-0x0000000000409000-memory.dmp

      Filesize

      36KB

    • memory/3020-6-0x0000000000400000-0x0000000000409000-memory.dmp

      Filesize

      36KB