Analysis

  • max time kernel
    78s
  • max time network
    21s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    04/02/2022, 07:20

General

  • Target

    49e8225fe23b5837bd438b4e6a30cf32.exe

  • Size

    1.2MB

  • MD5

    49e8225fe23b5837bd438b4e6a30cf32

  • SHA1

    c5a5d8d70db15326c0c0fea262cbf8efc3539951

  • SHA256

    000bb73658113adcf4b6f1c6c323321875885393a27e3b7541f9418f8875d3eb

  • SHA512

    b763ac7e137e2ef541d729bb9c95d301137e2328536efd53b2188051e75c7c66c6cfa87cda87d5150993dba0be2917d3ef5d97451feb4ad9c57344636f909f55

Malware Config

Extracted

Family

cryptbot

C2

faodrt28.top

Attributes
  • payload_url

    http://cutlej02.top/download.php?file=wapude.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\49e8225fe23b5837bd438b4e6a30cf32.exe
    "C:\Users\Admin\AppData\Local\Temp\49e8225fe23b5837bd438b4e6a30cf32.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:1476
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\nFsudOTbd & timeout 4 & del /f /q "C:\Users\Admin\AppData\Local\Temp\49e8225fe23b5837bd438b4e6a30cf32.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:748
      • C:\Windows\SysWOW64\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:776

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/1476-53-0x0000000075D61000-0x0000000075D63000-memory.dmp

          Filesize

          8KB

        • memory/1476-54-0x0000000000220000-0x0000000000221000-memory.dmp

          Filesize

          4KB

        • memory/1476-55-0x0000000000540000-0x0000000000588000-memory.dmp

          Filesize

          288KB