Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-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
  • Windows security bypass 2 TTPs 2 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.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Windows security modification 2 TTPs 3 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 32 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 39 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⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4692
    • 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:3260
      • 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:408
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3C1E.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3952
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:384
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • UAC bypass
        • Windows security bypass
        • Checks computer location settings
        • Executes dropped EXE
        • Windows security modification
        • Checks whether UAC is enabled
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:4472
        • 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:1824
        • C:\Program Files (x86)\Windows Mail\wab.exe
          "C:\Program Files (x86)\Windows Mail\wab.exe"
          4⤵
          • Suspicious use of SetThreadContext
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:3564
          • C:\Program Files (x86)\Windows Mail\wab.exe
            "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\deuudlmynaddeihjhwujjwn"
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:3096
          • C:\Program Files (x86)\Windows Mail\wab.exe
            "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\fyzneexabivigwvnqghcmbabfi"
            5⤵
            • Accesses Microsoft Outlook accounts
            PID:2800
          • C:\Program Files (x86)\Windows Mail\wab.exe
            "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\qafffwhuwqnnrcrrhrbexousoobjg"
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:844
        • C:\Program Files (x86)\Windows Mail\wab.exe
          "C:\Program Files (x86)\Windows Mail\wab.exe"
          4⤵
            PID:4784

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gcunew4h.ypi.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

      Filesize

      4KB

      MD5

      365f45018b7bcc98591979d6c4b23752

      SHA1

      073aff125450845105f5daa7d0e7cc24ee8bbca5

      SHA256

      27be905cdbf87c23851d00d61afd5fcfe5c72b1de227ac7d8c0dc5c7583c9a6e

      SHA512

      4bd0d2266c624b9ad40e9ba6cb4d63debd12f46f5c27afae3bfc20e3e7f5e9f9c88f83151166324223c5889034a4d70652cf747f6943af011191c64c28e18703

    • C:\Users\Admin\AppData\Local\Temp\tmp3C1E.tmp.bat

      Filesize

      151B

      MD5

      8f171c5f7b04ec84fa164cc84dd32eeb

      SHA1

      add390d0c920607f31bec27fa973e9234ba6cb7d

      SHA256

      d03466763641b14e073b415fdd581bff8354168cd0c26cc636765d5a7fc131a8

      SHA512

      89a0527f483d42bc983df06d9c188bd41cf4eb0cbf067e41fc57419afb0526c3ac2623088273aaeb720278469147c60f625c5f4247e8b8ebfdca1b54d1d13c5c

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

      Filesize

      908KB

      MD5

      1b8e229e83f21a946115606f54fe6b8d

      SHA1

      cf230bc4206a1789858160a0f2d3a87ed14c36a9

      SHA256

      5311d825c3975765c9a9a56f7c28f98b6f92c90b21a2a5ecd1bbbb0aabd82070

      SHA512

      1f9911b01d8e3e177badb698819c06c490e3e376e23f40f99b995633e8b033427f2d5120c88d4f373a6fc3bb6e3ba5bbf526d6fa81097a188bf6f963e40bb0d1

    • memory/844-41-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/844-42-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/844-46-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1824-17-0x0000021753400000-0x0000021753422000-memory.dmp

      Filesize

      136KB

    • memory/2800-40-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2800-36-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2800-38-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/3096-39-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/3096-35-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/3096-37-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/3564-16-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-54-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/3564-34-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-30-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-29-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-66-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-15-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-14-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-13-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-65-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-64-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-63-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-48-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-62-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-50-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/3564-31-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-53-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/3564-55-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-56-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-57-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-58-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-59-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-60-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3564-61-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4692-1-0x000001DCA4870000-0x000001DCA4886000-memory.dmp

      Filesize

      88KB

    • memory/4692-2-0x00007FFD234B0000-0x00007FFD23F71000-memory.dmp

      Filesize

      10.8MB

    • memory/4692-3-0x000001DCBEE40000-0x000001DCBEF14000-memory.dmp

      Filesize

      848KB

    • memory/4692-8-0x00007FFD234B0000-0x00007FFD23F71000-memory.dmp

      Filesize

      10.8MB

    • memory/4692-0-0x00007FFD234B3000-0x00007FFD234B5000-memory.dmp

      Filesize

      8KB