Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    11/02/2022, 02:35

General

  • Target

    e1d2efbb7c57651e87c324030e6a1c53f171e2f69a49c94556ae7ff63f7e864d.exe

  • Size

    2.8MB

  • MD5

    e066ff0c7010232f1059d0398dc2c720

  • SHA1

    320d69f502460a590679e4ac35309df0f0707216

  • SHA256

    e1d2efbb7c57651e87c324030e6a1c53f171e2f69a49c94556ae7ff63f7e864d

  • SHA512

    852cf674c9ecd9586e9355a0558d97feec59669bee9270a1dcb7906976e13d9514afa0974ec2bcec9aa68d14b603f15b4f6b18d252720afba17eafcbe86cc88d

Malware Config

Extracted

Family

cryptbot

C2

zyoksv12.top

morlea01.top

Attributes
  • payload_url

    http://yapivt01.top/download.php?file=ainger.exe

Signatures

  • CryptBot

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

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • 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 1 IoCs

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

  • Themida packer 3 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • 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.

  • Delays execution with timeout.exe 1 IoCs
  • Modifies data under HKEY_USERS 49 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e1d2efbb7c57651e87c324030e6a1c53f171e2f69a49c94556ae7ff63f7e864d.exe
    "C:\Users\Admin\AppData\Local\Temp\e1d2efbb7c57651e87c324030e6a1c53f171e2f69a49c94556ae7ff63f7e864d.exe"
    1⤵
    • Checks BIOS information in registry
    • Checks computer location settings
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3328
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\AFRgbYju & timeout 4 & del /f /q "C:\Users\Admin\AppData\Local\Temp\e1d2efbb7c57651e87c324030e6a1c53f171e2f69a49c94556ae7ff63f7e864d.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1304
      • C:\Windows\SysWOW64\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:336
  • C:\Windows\system32\MusNotifyIcon.exe
    %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
    1⤵
    • Checks processor information in registry
    PID:3464
  • 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:1848

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/3328-130-0x0000000000030000-0x0000000000777000-memory.dmp

          Filesize

          7.3MB

        • memory/3328-131-0x0000000000030000-0x0000000000777000-memory.dmp

          Filesize

          7.3MB

        • memory/3328-132-0x0000000000030000-0x0000000000777000-memory.dmp

          Filesize

          7.3MB

        • memory/3328-133-0x00000000775B4000-0x00000000775B6000-memory.dmp

          Filesize

          8KB