Analysis

  • max time kernel
    28s
  • max time network
    32s
  • platform
    windows7_x64
  • resource
    win7-20230703-en
  • resource tags

    arch:x64arch:x86image:win7-20230703-enlocale:en-usos:windows7-x64system
  • submitted
    05-07-2023 13:15

General

  • Target

    stub.exe

  • Size

    1.6MB

  • MD5

    303df0ff45fc487db83f9a14a7eb3594

  • SHA1

    e36f528cefba775bf21f04cc208e90b815df8234

  • SHA256

    35b48e9472a04ef28d51e5af06dafc8d8573d22bd4159cfc5007b7321a0aa337

  • SHA512

    1ebaec29abe8bf659255a3e78893921a5916f8ab8c8d9f607da27e6284cc885c0951bcda7bcbc6cfb47e650a3f1f96c575f0e38881474a227c02ce84821e11a2

  • SSDEEP

    24576:Di2Q9NXw2/wPOjdGxY2rqkqjVnlqud+/2P+A+ZecdyFoBkkAnexMrdgLs:mTq24GjdGSiqkqXfd+/9AqYanieKd

Score
10/10

Malware Config

Signatures

  • Stealerium

    An open source info stealer written in C# first seen in May 2022.

  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\stub.exe
    "C:\Users\Admin\AppData\Local\Temp\stub.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2352
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmp3766.tmp.bat
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1408
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
          PID:336
        • C:\Windows\SysWOW64\taskkill.exe
          TaskKill /F /IM 2352
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:2764
        • C:\Windows\SysWOW64\timeout.exe
          Timeout /T 2 /Nobreak
          3⤵
          • Delays execution with timeout.exe
          PID:992

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp3766.tmp.bat

      Filesize

      57B

      MD5

      f0fcfd0d77c58b3964a023019fe217ac

      SHA1

      a1ce4f6f596901778c3fa4222809771bf901c263

      SHA256

      f0c1609f938b9911c4ed9859d79dfe7a3997001bb5453bc386af8dab53e7ad4c

      SHA512

      e1e66b8ff546eca25acf947106f11d66db408ee1445c0fef7c7d385eea82a8535147c9db650a8aa34f095022cd36b1571f9e33cb945ffc78bea6802b3d114c05

    • memory/2352-54-0x0000000000230000-0x00000000003C2000-memory.dmp

      Filesize

      1.6MB

    • memory/2352-55-0x0000000004BA0000-0x0000000004BE0000-memory.dmp

      Filesize

      256KB