Analysis

  • max time kernel
    120s
  • max time network
    130s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    12/02/2022, 07:17

General

  • Target

    46ef9917a72794e5f99021e65c831a3342710426d53e40c218f2257b02042607.exe

  • Size

    1013KB

  • MD5

    ce7fea497e325ef4b82a6eee9a96db8f

  • SHA1

    30e151ba95e25642bdcaafa78f6aba0cd3833173

  • SHA256

    46ef9917a72794e5f99021e65c831a3342710426d53e40c218f2257b02042607

  • SHA512

    4f80c8a091caf70adf51456d412701bb53f75a67f18b92af2b8d831c2b6442075ebd9801a8bb6db9008936a0c4e82c9155654709a572d57c32e853c4b44d5be1

Malware Config

Extracted

Family

cryptbot

C2

hevpxm41.top

morosf04.top

Attributes
  • payload_url

    http://kyrgvz05.top/download.php?file=kulmet.exe

Signatures

  • CryptBot

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

  • Deletes itself 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 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\46ef9917a72794e5f99021e65c831a3342710426d53e40c218f2257b02042607.exe
    "C:\Users\Admin\AppData\Local\Temp\46ef9917a72794e5f99021e65c831a3342710426d53e40c218f2257b02042607.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:1888
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\aGhLZMiSQ & timeout 4 & del /f /q "C:\Users\Admin\AppData\Local\Temp\46ef9917a72794e5f99021e65c831a3342710426d53e40c218f2257b02042607.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1828
      • C:\Windows\SysWOW64\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:1704

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/1888-54-0x0000000076071000-0x0000000076073000-memory.dmp

          Filesize

          8KB

        • memory/1888-56-0x0000000000220000-0x0000000000221000-memory.dmp

          Filesize

          4KB

        • memory/1888-55-0x0000000000424000-0x0000000000426000-memory.dmp

          Filesize

          8KB

        • memory/1888-57-0x0000000000350000-0x0000000000398000-memory.dmp

          Filesize

          288KB