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Analysis

  • max time kernel
    142s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/06/2024, 08:28

General

  • Target

    e1d3e9feb67fde0b13f317d2bbfe700a6cc1249658b7b5a6970c944872a2e736.exe

  • Size

    1.5MB

  • MD5

    727ef110c7a27f21d4bbfc8b0e2edd92

  • SHA1

    6e05d62821268c5d783d53ccde347b9a6ca588c8

  • SHA256

    e1d3e9feb67fde0b13f317d2bbfe700a6cc1249658b7b5a6970c944872a2e736

  • SHA512

    661a0b4005a001e01e62d33ff05650ebad1164a9845aa5b2a9ec277e061acb798bd3ab04cd41335c15db694b13a00d9d31f3428120bc7e1af17aa78e3b8e310a

  • SSDEEP

    24576:2D39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjoc:2p7E+QrFUBgq2R

Malware Config

Extracted

Family

remcos

Botnet

Host

C2

213.183.58.19:4000

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    remcos.exe

  • copy_folder

    remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    true

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    true

  • keylog_file

    read.dat

  • keylog_flag

    false

  • keylog_folder

    CastC

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    remcos_sccafsoidz

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • detects Windows exceutables potentially bypassing UAC using eventvwr.exe 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e1d3e9feb67fde0b13f317d2bbfe700a6cc1249658b7b5a6970c944872a2e736.exe
    "C:\Users\Admin\AppData\Local\Temp\e1d3e9feb67fde0b13f317d2bbfe700a6cc1249658b7b5a6970c944872a2e736.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3708
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2380
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
        3⤵
        • Executes dropped EXE
        PID:1416
  • 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=4136 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1500

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

      Filesize

      1.5MB

      MD5

      1baa03b303575edaeb617fff1ea2aa67

      SHA1

      b32a48ff6498849d2151672047d5657e75d0d3e0

      SHA256

      cae8c3fdd0eb76df0aec81c2b19d3c1eb66ac8124c2260a91aae2857230c5038

      SHA512

      8eaf3f8d53f87109cd58b216a44ccd7f5542ecf4f143e1579ae83975b474181c9e91bb90797f2ca4ce3bdd9f61d3cda752c66e2de0f9a1df1d5226913bdef26d

    • memory/1416-35-0x0000000000730000-0x0000000000747000-memory.dmp

      Filesize

      92KB

    • memory/2380-30-0x00000000749C0000-0x0000000074F71000-memory.dmp

      Filesize

      5.7MB

    • memory/2380-39-0x00000000749C0000-0x0000000074F71000-memory.dmp

      Filesize

      5.7MB

    • memory/2380-32-0x00000000749C0000-0x0000000074F71000-memory.dmp

      Filesize

      5.7MB

    • memory/2380-31-0x00000000749C0000-0x0000000074F71000-memory.dmp

      Filesize

      5.7MB

    • memory/3708-5-0x00000000749C0000-0x0000000074F71000-memory.dmp

      Filesize

      5.7MB

    • memory/3708-28-0x00000000749C0000-0x0000000074F71000-memory.dmp

      Filesize

      5.7MB

    • memory/3708-29-0x00000000749C0000-0x0000000074F71000-memory.dmp

      Filesize

      5.7MB

    • memory/3708-6-0x00000000749C0000-0x0000000074F71000-memory.dmp

      Filesize

      5.7MB

    • memory/3708-0-0x00000000749C2000-0x00000000749C3000-memory.dmp

      Filesize

      4KB

    • memory/3708-2-0x00000000749C0000-0x0000000074F71000-memory.dmp

      Filesize

      5.7MB

    • memory/3708-1-0x00000000749C0000-0x0000000074F71000-memory.dmp

      Filesize

      5.7MB