Analysis

  • max time kernel
    147s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    09-05-2024 10:03

General

  • Target

    5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070.exe

  • Size

    908KB

  • MD5

    1b8e229e83f21a946115606f54fe6b8d

  • SHA1

    cf230bc4206a1789858160a0f2d3a87ed14c36a9

  • SHA256

    5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070

  • SHA512

    1f9911b01d8e3e177badb698819c06c490e3e376e23f40f99b995633e8b033427f2d5120c88d4f373a6fc3bb6e3ba5bbf526d6fa81097a188bf6f963e40bb0d1

  • SSDEEP

    24576:dzobfftwFNnnpXNihW/lZpM8fsp/vY6Jvui7Uxmt9H16OE:dcbXtANn1EhWxMW2+eUxmtV1XE

Malware Config

Extracted

Family

remcos

Botnet

PAPI

C2

64.188.26.202:1604

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-YMJ2R9

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • UAC bypass 3 TTPs 1 IoCs
  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 3 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 6 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 60 IoCs
  • System policy modification 1 TTPs 1 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070.exe
    "C:\Users\Admin\AppData\Local\Temp\5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1888
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2604
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:2508
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp39E5.tmp.bat""
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2272
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2588
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • UAC bypass
        • Executes dropped EXE
        • Checks whether UAC is enabled
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:2764
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\svchost.exe" -Force
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2468
        • C:\Windows\System32\notepad.exe
          "C:\Windows\System32\notepad.exe"
          4⤵
            PID:2940
          • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
            "C:\Program Files (x86)\Windows Media Player\wmplayer.exe"
            4⤵
            • Suspicious use of SetThreadContext
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of WriteProcessMemory
            PID:2820
            • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
              "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\naxtweagdgyhmdduruvckozmlipizzjk"
              5⤵
              • Suspicious behavior: EnumeratesProcesses
              PID:932
            • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
              "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\qckex"
              5⤵
              • Accesses Microsoft Outlook accounts
              PID:2956
            • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
              "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /stext "C:\Users\Admin\AppData\Local\Temp\awpwxhwc"
              5⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:864
          • C:\Windows\system32\WerFault.exe
            C:\Windows\system32\WerFault.exe -u -p 2764 -s 744
            4⤵
            • Loads dropped DLL
            PID:2140

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\naxtweagdgyhmdduruvckozmlipizzjk

      Filesize

      2B

      MD5

      f3b25701fe362ec84616a93a45ce9998

      SHA1

      d62636d8caec13f04e28442a0a6fa1afeb024bbb

      SHA256

      b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

      SHA512

      98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

    • C:\Users\Admin\AppData\Local\Temp\tmp39E5.tmp.bat

      Filesize

      151B

      MD5

      263c5b122ffbfd72783b8c7071762468

      SHA1

      8aaf7003a6254899632eee6ece4eee4b9437d110

      SHA256

      408968f9369b68b6ed6e99c6a0996a38ef787c01a2009b8d2857d89001760a8c

      SHA512

      4254d18bc70cfbac3ed0f4b18799211bb7786bcc68b5f84d996edd0ead9e9fc3c2deec62d83bddf3fad8219e25f41d30ec225ddb64c1c40007afe542b3cec5f9

    • \Users\Admin\AppData\Roaming\svchost.exe

      Filesize

      908KB

      MD5

      1b8e229e83f21a946115606f54fe6b8d

      SHA1

      cf230bc4206a1789858160a0f2d3a87ed14c36a9

      SHA256

      5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070

      SHA512

      1f9911b01d8e3e177badb698819c06c490e3e376e23f40f99b995633e8b033427f2d5120c88d4f373a6fc3bb6e3ba5bbf526d6fa81097a188bf6f963e40bb0d1

    • memory/864-84-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/864-85-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/864-86-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/932-76-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/932-75-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/932-79-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/932-82-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1888-1-0x00000000013D0000-0x00000000013E6000-memory.dmp

      Filesize

      88KB

    • memory/1888-3-0x000000001AEA0000-0x000000001AF74000-memory.dmp

      Filesize

      848KB

    • memory/1888-12-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

      Filesize

      9.9MB

    • memory/1888-0-0x000007FEF56D3000-0x000007FEF56D4000-memory.dmp

      Filesize

      4KB

    • memory/1888-2-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

      Filesize

      9.9MB

    • memory/2468-39-0x000000001B5B0000-0x000000001B892000-memory.dmp

      Filesize

      2.9MB

    • memory/2468-40-0x00000000028E0000-0x00000000028E8000-memory.dmp

      Filesize

      32KB

    • memory/2764-18-0x0000000000260000-0x0000000000276000-memory.dmp

      Filesize

      88KB

    • memory/2820-61-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2820-73-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2820-60-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2820-58-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2820-57-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2820-68-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2820-67-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2820-69-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2820-72-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2820-92-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2820-74-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2820-99-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2820-97-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2820-59-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2820-98-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2820-94-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2820-93-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2940-19-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2940-29-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2940-31-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2940-33-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2940-27-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2940-25-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2940-21-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2940-23-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2956-80-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2956-81-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2956-78-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB