Analysis

  • max time kernel
    57s
  • max time network
    50s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-07-2024 07:08

General

  • Target

    doc_00394039424.exe

  • Size

    903KB

  • MD5

    e34683e560b0c2a5cddcffe98956ea62

  • SHA1

    89a3dc3e4b06a8c4bd94bffc48adac82e620d910

  • SHA256

    f377f9ebb865d686833a830718e6d4eb3898a20e87b0b89e26436c10496c5054

  • SHA512

    4bf4a8fef3b740ba3e6a04bedaaa90970a60b72fc950d53de6e2bf597d89d5d399f9258f9f8088f0ea6304bfa219c5537271c9df59c463893d9589370a27ebff

  • SSDEEP

    24576:7CHszWooWQhqSJgZjY0ZbnC8DOCZs64HE:7CHNtqSEY0ZbntQ64HE

Malware Config

Extracted

Family

remcos

Botnet

2404

C2

107.173.4.16:2404

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

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-QBT08L

  • 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.

  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 6 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\doc_00394039424.exe
    "C:\Users\Admin\AppData\Local\Temp\doc_00394039424.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3236
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\doc_00394039424.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4744
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\AZjibU.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4340
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AZjibU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC4D6.tmp"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:4324
    • C:\Users\Admin\AppData\Local\Temp\doc_00394039424.exe
      "C:\Users\Admin\AppData\Local\Temp\doc_00394039424.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:32
      • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1948
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:5080
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\AZjibU.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3488
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AZjibU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFE94.tmp"
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:2680
        • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
          "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:1824
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            5⤵
              PID:1540
            • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
              C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\sbeeutuxpkbbgljmjdlxohmevj"
              5⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              PID:320
            • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
              C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\dwjwvleqdstgrrfytoxyruhnwxmqt"
              5⤵
              • Executes dropped EXE
              PID:4364
            • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
              C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\dwjwvleqdstgrrfytoxyruhnwxmqt"
              5⤵
              • Executes dropped EXE
              • Accesses Microsoft Outlook accounts
              PID:4376
            • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
              C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\nqopvdpsralltxtckykaczbefedruxhqk"
              5⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2540

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

      Filesize

      2KB

      MD5

      968cb9309758126772781b83adb8a28f

      SHA1

      8da30e71accf186b2ba11da1797cf67f8f78b47c

      SHA256

      92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

      SHA512

      4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      18KB

      MD5

      ab63e7116c4ed149d6ee04238fa31964

      SHA1

      a67369f5f7622c48d97528ca478756d2172e8b6f

      SHA256

      19fd08b9dff9e4e654c13c693d8257dbe1cd595fa49801e74dc7dec14cb8ccd6

      SHA512

      c3678334adcb0fa5357fed0522f81c714dff74f05b5963b524037980616f52b8027f2675bc0012f371602117bf64e67ab93b4ee9bae11d0b56b684534edace32

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      18KB

      MD5

      ed4bd0d8aa160368486a32d54be957f0

      SHA1

      7786b8dddade7ce53296e55c7a25c64b0c6605d8

      SHA256

      a18ff4a181d1dfe57a596510c8b1bf3c411c5c0f7102de3b98ab3d2f73fc16c3

      SHA512

      81be809f46084cb1d1c7888f0b1992a79a4ae078fae0343f1a0add597ba0ff3577aaefe399f24b17900f34e3be6540566d2513675f39a4bf6629b81c1b5b2973

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_muo1wn41.qyp.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

      Filesize

      4KB

      MD5

      1d22632ab7786a15873206bd9aeaaf47

      SHA1

      f982816e813cfdd43ad3339fa6ca7bf2425651e7

      SHA256

      c26d371c3209dea4e8cb298ab279746f0209643a1ef95ff627e2cfe193be838b

      SHA512

      456ee2bf5faefb56b5c9864ecb340293412c0ab50d47ff8ead5b0db88f3e61e74278a46063d4b816e1143020344add8bfd8f6baac142d984693e0d7be72e4ae0

    • C:\Users\Admin\AppData\Local\Temp\tmpC4D6.tmp

      Filesize

      1KB

      MD5

      166923428686b614a2fc9030a06e9da4

      SHA1

      ee3993fdffe5d11f0ac7a3422ef3fedd28a03ee6

      SHA256

      c2491db4cdb9e806c60ee47a115fb15c444513480d6fc866412652f7f88bb89f

      SHA512

      25397ba66054ff5d6ad1615feb0a58c2807d87f250474f11b744da824f665f96b47dfbbb1509e5685a1c24a15de5e8e6643d29caf6473906f0e8f5bca8fcc2fc

    • C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe

      Filesize

      903KB

      MD5

      e34683e560b0c2a5cddcffe98956ea62

      SHA1

      89a3dc3e4b06a8c4bd94bffc48adac82e620d910

      SHA256

      f377f9ebb865d686833a830718e6d4eb3898a20e87b0b89e26436c10496c5054

      SHA512

      4bf4a8fef3b740ba3e6a04bedaaa90970a60b72fc950d53de6e2bf597d89d5d399f9258f9f8088f0ea6304bfa219c5537271c9df59c463893d9589370a27ebff

    • memory/32-41-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/32-39-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/320-220-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/320-215-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/320-213-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1540-166-0x0000000000A50000-0x0000000000B34000-memory.dmp

      Filesize

      912KB

    • memory/1824-236-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1824-231-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1824-235-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1824-234-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1824-182-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1824-205-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1824-165-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1824-212-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1824-162-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1824-211-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1824-161-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1824-179-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1824-180-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1824-181-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2540-224-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2540-225-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2540-222-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/3236-8-0x0000000005590000-0x000000000559E000-memory.dmp

      Filesize

      56KB

    • memory/3236-0-0x000000007445E000-0x000000007445F000-memory.dmp

      Filesize

      4KB

    • memory/3236-3-0x0000000005090000-0x0000000005122000-memory.dmp

      Filesize

      584KB

    • memory/3236-4-0x0000000005030000-0x000000000503A000-memory.dmp

      Filesize

      40KB

    • memory/3236-5-0x0000000074450000-0x0000000074C00000-memory.dmp

      Filesize

      7.7MB

    • memory/3236-6-0x00000000053C0000-0x000000000545C000-memory.dmp

      Filesize

      624KB

    • memory/3236-2-0x00000000055A0000-0x0000000005B44000-memory.dmp

      Filesize

      5.6MB

    • memory/3236-1-0x0000000000680000-0x0000000000764000-memory.dmp

      Filesize

      912KB

    • memory/3236-49-0x0000000074450000-0x0000000074C00000-memory.dmp

      Filesize

      7.7MB

    • memory/3236-7-0x0000000005300000-0x0000000005310000-memory.dmp

      Filesize

      64KB

    • memory/3236-9-0x0000000006380000-0x0000000006440000-memory.dmp

      Filesize

      768KB

    • memory/3488-194-0x0000000074CE0000-0x0000000074D2C000-memory.dmp

      Filesize

      304KB

    • memory/4340-133-0x0000000007630000-0x0000000007CAA000-memory.dmp

      Filesize

      6.5MB

    • memory/4340-144-0x0000000074450000-0x0000000074C00000-memory.dmp

      Filesize

      7.7MB

    • memory/4340-140-0x0000000007330000-0x000000000734A000-memory.dmp

      Filesize

      104KB

    • memory/4340-27-0x0000000074450000-0x0000000074C00000-memory.dmp

      Filesize

      7.7MB

    • memory/4340-138-0x0000000007220000-0x000000000722E000-memory.dmp

      Filesize

      56KB

    • memory/4340-137-0x00000000071F0000-0x0000000007201000-memory.dmp

      Filesize

      68KB

    • memory/4340-42-0x0000000074450000-0x0000000074C00000-memory.dmp

      Filesize

      7.7MB

    • memory/4340-141-0x0000000007310000-0x0000000007318000-memory.dmp

      Filesize

      32KB

    • memory/4340-123-0x0000000070690000-0x00000000706DC000-memory.dmp

      Filesize

      304KB

    • memory/4376-217-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/4376-221-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/4376-219-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/4744-135-0x00000000077E0000-0x00000000077EA000-memory.dmp

      Filesize

      40KB

    • memory/4744-145-0x0000000074450000-0x0000000074C00000-memory.dmp

      Filesize

      7.7MB

    • memory/4744-122-0x0000000007640000-0x00000000076E3000-memory.dmp

      Filesize

      652KB

    • memory/4744-14-0x0000000004EA0000-0x0000000004ED6000-memory.dmp

      Filesize

      216KB

    • memory/4744-15-0x0000000074450000-0x0000000074C00000-memory.dmp

      Filesize

      7.7MB

    • memory/4744-121-0x0000000007410000-0x000000000742E000-memory.dmp

      Filesize

      120KB

    • memory/4744-110-0x0000000006A20000-0x0000000006A52000-memory.dmp

      Filesize

      200KB

    • memory/4744-17-0x0000000074450000-0x0000000074C00000-memory.dmp

      Filesize

      7.7MB

    • memory/4744-16-0x0000000005510000-0x0000000005B38000-memory.dmp

      Filesize

      6.2MB

    • memory/4744-111-0x0000000070690000-0x00000000706DC000-memory.dmp

      Filesize

      304KB

    • memory/4744-98-0x0000000006440000-0x000000000645E000-memory.dmp

      Filesize

      120KB

    • memory/4744-99-0x0000000006490000-0x00000000064DC000-memory.dmp

      Filesize

      304KB

    • memory/4744-18-0x0000000074450000-0x0000000074C00000-memory.dmp

      Filesize

      7.7MB

    • memory/4744-136-0x00000000079F0000-0x0000000007A86000-memory.dmp

      Filesize

      600KB

    • memory/4744-40-0x0000000005F80000-0x00000000062D4000-memory.dmp

      Filesize

      3.3MB

    • memory/4744-139-0x00000000079B0000-0x00000000079C4000-memory.dmp

      Filesize

      80KB

    • memory/4744-28-0x0000000005E10000-0x0000000005E76000-memory.dmp

      Filesize

      408KB

    • memory/4744-20-0x0000000005CF0000-0x0000000005D56000-memory.dmp

      Filesize

      408KB

    • memory/4744-19-0x0000000005480000-0x00000000054A2000-memory.dmp

      Filesize

      136KB

    • memory/4744-134-0x0000000007770000-0x000000000778A000-memory.dmp

      Filesize

      104KB

    • memory/5080-158-0x0000000006060000-0x00000000063B4000-memory.dmp

      Filesize

      3.3MB

    • memory/5080-178-0x0000000006AB0000-0x0000000006AFC000-memory.dmp

      Filesize

      304KB

    • memory/5080-207-0x0000000007AF0000-0x0000000007B04000-memory.dmp

      Filesize

      80KB

    • memory/5080-206-0x0000000007AA0000-0x0000000007AB1000-memory.dmp

      Filesize

      68KB

    • memory/5080-193-0x0000000007770000-0x0000000007813000-memory.dmp

      Filesize

      652KB

    • memory/5080-183-0x0000000074CE0000-0x0000000074D2C000-memory.dmp

      Filesize

      304KB