Analysis

  • max time kernel
    142s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-04-2024 11:15

General

  • Target

    reducer.exe

  • Size

    29KB

  • MD5

    113b4c92dca5eb03fef7916d9d3216be

  • SHA1

    231a7949ef5eb2fadf148884742b40d32e71cdd7

  • SHA256

    d01b49ea8c4f9215e0838147fb4eb5909c6298e9f1314e7401faf0d6cbc5d9e0

  • SHA512

    fe348660ff1d08b937178466852c04042db6fa0ceda6981c7cdff726e6629741d1170bfee6be16c115a9df1d2a3177b985ade216a137d2f6f83fbd2ab199cd10

  • SSDEEP

    768:KMLDTH3XaAy8MM9cmtqTbUh/W2pfAIxsXo:PHiS9cIhe2pI3o

Malware Config

Extracted

Family

discordrat

Attributes
  • discord_token

    MTEyOTg3Mzk2MjY0MjQ2MDc3Mw.GVoB7q.zgQTyRC6__mUfWAQ71TKowd69RCw5b2gtOewvc

  • server_id

    979482293682978877

Signatures

  • Discord RAT

    A RAT written in C# using Discord as a C2.

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 9 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\reducer.exe
    "C:\Users\Admin\AppData\Local\Temp\reducer.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Suspicious use of WriteProcessMemory
    PID:1132
    • C:\Users\Admin\AppData\Local\Temp\DriverFolder\Reducer.exe
      "C:\Users\Admin\AppData\Local\Temp\DriverFolder\Reducer.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2096
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c pause
      2⤵
        PID:3260
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4172 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:8
      1⤵
        PID:1748
      • C:\Windows\System32\rundll32.exe
        C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
        1⤵
          PID:4432

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\DriverFolder\Reducer.exe

          Filesize

          78KB

          MD5

          a0ed18c4c55e30f18daea0a73d7fbaf2

          SHA1

          a1fcf1341639f9866dbf6e5a159f189f1daa83b4

          SHA256

          a9e915cdf40d63a220b00b2391859d240969293bb489d2c78b55273079793a15

          SHA512

          034691a5765e9b601a18fc385c783ac5083b13f2bc84500adbab799eca2013467f0eaf23a87222113649a43488e890430491124de994569ab7f441b12640e070

        • memory/2096-27-0x00000215F2830000-0x00000215F2848000-memory.dmp

          Filesize

          96KB

        • memory/2096-31-0x00000215F4EA0000-0x00000215F5062000-memory.dmp

          Filesize

          1.8MB

        • memory/2096-32-0x00007FF9836D0000-0x00007FF984191000-memory.dmp

          Filesize

          10.8MB

        • memory/2096-33-0x00000215F44B0000-0x00000215F44C0000-memory.dmp

          Filesize

          64KB

        • memory/2096-34-0x00000215F6320000-0x00000215F6848000-memory.dmp

          Filesize

          5.2MB

        • memory/2096-35-0x00007FF9836D0000-0x00007FF984191000-memory.dmp

          Filesize

          10.8MB

        • memory/2096-36-0x00000215F44B0000-0x00000215F44C0000-memory.dmp

          Filesize

          64KB

        • memory/2096-38-0x00007FF9836D0000-0x00007FF984191000-memory.dmp

          Filesize

          10.8MB