Analysis

  • max time kernel
    79s
  • max time network
    128s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-03-2023 02:13

General

  • Target

    b5e1e946ebad560b876703e9675ca326.exe

  • Size

    308KB

  • MD5

    b5e1e946ebad560b876703e9675ca326

  • SHA1

    c0e2e24a911a4d8e9cbc5a483ef8876fbabfa772

  • SHA256

    c33ecac87bf07fc75b6768b76622daac389e05ef718c457e0393238d646bb130

  • SHA512

    8ee9e9af2731eb83af3f17aa19b9a74547429f026882fb6d592d74d97ed958f990f46c5be5371e06360503672e9f8ca00ccf9d64ed59d11475c86a6f35ac1ff5

  • SSDEEP

    6144:bOsY+HgEiTA14Xn0Ti8v1bbFgXIQdjrfzNt1gEP3:i814Xn0Ti8tbJyIQdjrfzWEP3

Score
10/10

Malware Config

Signatures

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b5e1e946ebad560b876703e9675ca326.exe
    "C:\Users\Admin\AppData\Local\Temp\b5e1e946ebad560b876703e9675ca326.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3268
    • C:\Users\Admin\AppData\Local\Temp\b5e1e946ebad560b876703e9675ca326.exe
      "C:\Users\Admin\AppData\Local\Temp\b5e1e946ebad560b876703e9675ca326.exe" -h
      2⤵
      • Suspicious use of SetWindowsHookEx
      PID:3612
  • C:\Windows\system32\rundll32.exe
    rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
    1⤵
    • Process spawned unexpected child process
    • Suspicious use of WriteProcessMemory
    PID:512
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
      2⤵
      • Loads dropped DLL
      PID:4340
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4340 -s 600
        3⤵
        • Program crash
        PID:4416
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4340 -ip 4340
    1⤵
      PID:4532

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\db.dat

      Filesize

      557KB

      MD5

      fd90f85bea1392578bc903144ace2ace

      SHA1

      0eabae72ab684584ca78dce7680fb997d7aba07b

      SHA256

      32e932155cf3f208d90aa0a058a87cf072e54e38e8c5c22c045411bac0bf936d

      SHA512

      6de4887f177d71e21b89c9d431244044b50f3bb994939690413e77775dcc17b06a4dc11c7f5b1f6f382459e12bc9800fbba81fc54f41a4dbe77e5b52c90c4151

    • C:\Users\Admin\AppData\Local\Temp\db.dll

      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

    • C:\Users\Admin\AppData\Local\Temp\db.dll

      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6