Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows10-1703_x64
  • resource
    win10-20240611-en
  • resource tags

    arch:x64arch:x86image:win10-20240611-enlocale:en-usos:windows10-1703-x64system
  • submitted
    02/08/2024, 11:14

General

  • Target
    Loader V2.exe
  • Size 8.1MB
  • Sample240802-nb8q5awbpr
  • SHA256 14430e71914c83f8d1de8e66caa39d07ab782efb662245fb9eff6aa9fca7ce87
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • xworm

C2
  • 147.185.221.20:13908

  • 147.185.221.16:60401

Attributes
  • Install_directory

    %AppData%

  • install_file

    svhost.exe

  • telegram

    https://api.telegram.org/bot7220907212:AAEOc5N7cpqGUVVvnWrzGHm8mdOrYN2e9mc/sendMessage?chat_id=6987872630

Extracted

Family
  • 44caliber

C2
  • https://discord.com/api/webhooks/1267250103538810911/_8BMipnmgDV4n-Uu_YmzeHrxrFFQPSAoBBDlwlDVhsDsk_31uQMADxZw-pq563wCO5KV

Signatures

  • 44Caliber

    An open source infostealer written in C#.

  • Detect Xworm Payload 4 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • 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.

  • Drops startup file 4 IoCs
  • Executes dropped EXE 8 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Looks up external IP address via web service 3 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • 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 18 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 20 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\Loader V2.exe
    "C:\Users\Admin\AppData\Local\Temp\Loader V2.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4604
    • C:\Users\Admin\AppData\Roaming\Loader.exe
      "C:\Users\Admin\AppData\Roaming\Loader.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:596
      • C:\Users\Admin\AppData\Local\Temp\loaderr.exe
        "C:\Users\Admin\AppData\Local\Temp\loaderr.exe"
        3⤵
        • Drops startup file
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        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\Local\Temp\loaderr.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4296
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'loaderr.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4396
        • 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\Local\svchost.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4640
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          PID:5036
        • C:\Windows\System32\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Local\svchost.exe"
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:752
      • C:\Users\Admin\AppData\Local\Temp\fixer.exe
        "C:\Users\Admin\AppData\Local\Temp\fixer.exe"
        3⤵
        • Executes dropped EXE
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4052
    • C:\Users\Admin\AppData\Roaming\injectdll.exe
      "C:\Users\Admin\AppData\Roaming\injectdll.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4372
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svhost" /tr "C:\Users\Admin\AppData\Roaming\svhost.exe"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2628
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:4668
  • C:\Users\Admin\AppData\Local\svchost.exe
    C:\Users\Admin\AppData\Local\svchost.exe
    1⤵
    • Executes dropped EXE
    PID:3480
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:2580
  • C:\Users\Admin\AppData\Local\svchost.exe
    C:\Users\Admin\AppData\Local\svchost.exe
    1⤵
    • Executes dropped EXE
    PID:4188

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        Process.txt

        • Path C:\Users\Admin\AppData\Local\44\Process.txt
        • Size 937B
        • SHA256 2dfa544014f8914104ee3949cc9fd97f0322ae2242b8225b5ae449f66819dd39
        • MD5 SHA1 SHA512

        Process.txt

        • Path C:\Users\Admin\AppData\Local\44\Process.txt
        • Size 1KB
        • SHA256 c92807d6674d3dcbc99139c22132c6eba338c1acaaa5a71f56a5e0751bc1c676
        • MD5 SHA1 SHA512

        Process.txt

        • Path C:\Users\Admin\AppData\Local\44\Process.txt
        • Size 653B
        • SHA256 7d01873b5e6be4cfcf6a89ca4d982a62c2e814b61451e5d34172579ebd7be373
        • MD5 SHA1 SHA512

        Process.txt

        • Path C:\Users\Admin\AppData\Local\44\Process.txt
        • Size 638B
        • SHA256 00ccd02f0f2e3d2fff25d34cd7a8656442a6b45819ba0f11f345424d3af69118
        • MD5 SHA1 SHA512

        Process.txt

        • Path C:\Users\Admin\AppData\Local\44\Process.txt
        • Size 682B
        • SHA256 4c8c724e2da7ded3a44d87077bc45ae17ff85101d4cbe57d297dc5ddd6173e6d
        • MD5 SHA1 SHA512

        powershell.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
        • Size 3KB
        • SHA256 fdd7d9def6f9f0c0f2e60dbc8a2d1999071cd7d3095e9e087bb1cda7a614ac3c
        • MD5 SHA1 SHA512

        svhost.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svhost.exe.log
        • Size 654B
        • SHA256 87ba77c13905298acbac72be90949c4fe0755b6eff9777615aa37f252515f151
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 812c177767c772c1f5299d9016f2fba49872e5591d3ebac26e21726bfb36a70e
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 99740d3e9cfe5284d4f0c7a86620f4d53fc1c97e328fbf33edfb4731a37bca97
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 a3b5322adf9b3c8dca365400b2e29e8f011d9a105e6616dacd69392e2f841d44
        • MD5 SHA1 SHA512

        __PSScriptPolicyTest_w55xyjke.ay4.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_w55xyjke.ay4.ps1
        • Size 1B
        • SHA256 6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b
        • MD5 SHA1 SHA512

        fixer.exe

        • Path C:\Users\Admin\AppData\Local\Temp\fixer.exe
        • Size 274KB
        • SHA256 62e414e990e80c8203955b0e32948ddc64903b80a462c339f1babfb03e641204
        • MD5 SHA1 SHA512 SSDEEP

        loaderr.exe

        • Path C:\Users\Admin\AppData\Local\Temp\loaderr.exe
        • Size 65KB
        • SHA256 aa40b9b929868482be1daae474d7c93426cd049f844c956865709ff8b7f240c2
        • MD5 SHA1 SHA512 SSDEEP

        Loader.exe

        • Path C:\Users\Admin\AppData\Roaming\Loader.exe
        • Size 7.6MB
        • SHA256 c0a2b824a0fd05854818bfb81b02bc6178db3f8519807b15d844580099428e1d
        • MD5 SHA1 SHA512 SSDEEP

        injectdll.exe

        • Path C:\Users\Admin\AppData\Roaming\injectdll.exe
        • Size 244KB
        • SHA256 b481f1e0cfe25e5f19da0a0333c78661bf5c75c0b1c616ff4aaaa07aed31efd1
        • MD5 SHA1 SHA512 SSDEEP

        memory/596-64-0x00007FFCC5640000-0x00007FFCC581B000-memory.dmp

        memory/596-17-0x0000000000C10000-0x00000000013A4000-memory.dmp

        memory/596-13-0x00007FFCC5640000-0x00007FFCC581B000-memory.dmp

        memory/2892-34-0x0000000000630000-0x0000000000646000-memory.dmp

        memory/4052-33-0x000001E31CE40000-0x000001E31CE8A000-memory.dmp

        memory/4296-150-0x00000253304E0000-0x0000025330502000-memory.dmp

        memory/4296-153-0x0000025330690000-0x0000025330706000-memory.dmp

        memory/4372-141-0x00007FFCC5640000-0x00007FFCC581B000-memory.dmp

        memory/4372-138-0x00007FFCC5640000-0x00007FFCC581B000-memory.dmp

        memory/4372-16-0x0000000000440000-0x0000000000482000-memory.dmp

        memory/4372-14-0x00007FFCC5640000-0x00007FFCC581B000-memory.dmp

        memory/4604-0-0x00007FFCC5640000-0x00007FFCC581B000-memory.dmp

        memory/4604-15-0x00007FFCC5640000-0x00007FFCC581B000-memory.dmp

        memory/4604-1-0x0000000000940000-0x0000000001158000-memory.dmp