Analysis

  • max time kernel
    161s
  • max time network
    170s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    06/02/2022, 10:36

General

  • Target

    956c7b865794dcc8c289447883b6f3fa7e32b0338f9b3643691a04ead1b15631.exe

  • Size

    9.7MB

  • MD5

    c351f7589ea51b049954973c17d2f949

  • SHA1

    e84d2160de723af76ea5edc3f1de9e1e42d31a68

  • SHA256

    956c7b865794dcc8c289447883b6f3fa7e32b0338f9b3643691a04ead1b15631

  • SHA512

    975262b121a1ddb0be3f80cd539a2dc8657e2b37882ec55d62b387234782d8767aae315e169961bf2cb8dd78a31f93e7e80fbc96f2eaf893a00d898c9510a2b0

Malware Config

Extracted

Family

cryptbot

C2

nkoopw13.top

moraass08.top

Signatures

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

  • CryptBot Payload 1 IoCs
  • suricata: ET MALWARE EXE Download Request To Wordpress Folder Likely Malicious

    suricata: ET MALWARE EXE Download Request To Wordpress Folder Likely Malicious

  • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Blocklisted process makes network request 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Identifies Wine through registry keys 2 TTPs 1 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Loads dropped DLL 5 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
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 4 IoCs

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

  • Modifies data under HKEY_USERS 47 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\956c7b865794dcc8c289447883b6f3fa7e32b0338f9b3643691a04ead1b15631.exe
    "C:\Users\Admin\AppData\Local\Temp\956c7b865794dcc8c289447883b6f3fa7e32b0338f9b3643691a04ead1b15631.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3532
    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\file.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\file.exe"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Modifies system certificate store
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1340
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c ping 127.0.0.1 && del "C:\Users\Admin\AppData\Local\Temp\RarSFX0\file.exe" >> NUL
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2836
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.1
          4⤵
          • Runs ping.exe
          PID:496
    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Setup.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Setup.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3988
      • C:\Windows\SysWOW64\cscript.exe
        "cscript.exe" pub2.vbs //e:vbscript //NOLOGO
        3⤵
        • Blocklisted process makes network request
        PID:3732
      • C:\Users\Admin\AppData\Local\Temp\sibD81B.tmp\1\2.exe
        "C:\Users\Admin\AppData\Local\Temp\sibD81B.tmp\1\2.exe" /s
        3⤵
        • Executes dropped EXE
        • Checks BIOS information in registry
        • Identifies Wine through registry keys
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SetWindowsHookEx
        PID:2804
  • C:\Windows\system32\MusNotifyIcon.exe
    %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
    1⤵
    • Checks processor information in registry
    PID:4056
  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k NetworkService -p
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    PID:1492

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/1340-170-0x0000000000AE0000-0x0000000000AED000-memory.dmp

          Filesize

          52KB

        • memory/2804-196-0x0000000000F30000-0x0000000001433000-memory.dmp

          Filesize

          5.0MB

        • memory/2804-197-0x0000000004A20000-0x0000000004A21000-memory.dmp

          Filesize

          4KB

        • memory/2804-202-0x0000000004A30000-0x0000000004A31000-memory.dmp

          Filesize

          4KB

        • memory/2804-200-0x0000000004A80000-0x0000000004A81000-memory.dmp

          Filesize

          4KB

        • memory/2804-201-0x0000000004A90000-0x0000000004A91000-memory.dmp

          Filesize

          4KB

        • memory/2804-199-0x0000000004A10000-0x0000000004A11000-memory.dmp

          Filesize

          4KB

        • memory/2804-194-0x0000000004A50000-0x0000000004A51000-memory.dmp

          Filesize

          4KB

        • memory/2804-198-0x0000000004A70000-0x0000000004A71000-memory.dmp

          Filesize

          4KB

        • memory/2804-193-0x0000000004A40000-0x0000000004A41000-memory.dmp

          Filesize

          4KB

        • memory/2804-195-0x0000000004A60000-0x0000000004A61000-memory.dmp

          Filesize

          4KB

        • memory/3988-182-0x0000000010E14000-0x0000000010E16000-memory.dmp

          Filesize

          8KB

        • memory/3988-184-0x0000000010C80000-0x0000000010D3A000-memory.dmp

          Filesize

          744KB

        • memory/3988-183-0x0000000010E16000-0x0000000010E17000-memory.dmp

          Filesize

          4KB

        • memory/3988-178-0x000000000EB40000-0x000000000EB52000-memory.dmp

          Filesize

          72KB

        • memory/3988-180-0x0000000010E11000-0x0000000010E12000-memory.dmp

          Filesize

          4KB

        • memory/3988-179-0x0000000010E10000-0x0000000010E11000-memory.dmp

          Filesize

          4KB

        • memory/3988-181-0x0000000010E13000-0x0000000010E14000-memory.dmp

          Filesize

          4KB

        • memory/3988-187-0x0000000010D60000-0x0000000010D68000-memory.dmp

          Filesize

          32KB