Analysis

  • max time kernel
    119s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    28/01/2022, 07:53

General

  • Target

    cec36245b24ef143ac15f64d7a2db73020b73b7d.exe

  • Size

    1.3MB

  • MD5

    f437a2db4d6da017299aadb215b5870b

  • SHA1

    cec36245b24ef143ac15f64d7a2db73020b73b7d

  • SHA256

    f25ff2f1936c55d00927e445f4386a2f30b0c39b81c30b2b3eb21ae3527d2ec2

  • SHA512

    1eddcbcfcccd94fac4b23fe73f5199fabb14250b9d76c21d1d48cbeb78c45e7d877a09da169ebbd096de76140c2280ee63b3256b7da509af7876dbeb785066ad

Malware Config

Extracted

Family

cryptbot

C2

tiswul75.top

morypv07.top

Attributes
  • payload_url

    http://danevn10.top/download.php?file=avenin.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\cec36245b24ef143ac15f64d7a2db73020b73b7d.exe
    "C:\Users\Admin\AppData\Local\Temp\cec36245b24ef143ac15f64d7a2db73020b73b7d.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:1724
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\UwMbVUqpynM & timeout 4 & del /f /q "C:\Users\Admin\AppData\Local\Temp\cec36245b24ef143ac15f64d7a2db73020b73b7d.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:464
      • C:\Windows\SysWOW64\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:1384

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/1724-54-0x0000000076C91000-0x0000000076C93000-memory.dmp

          Filesize

          8KB

        • memory/1724-55-0x0000000000290000-0x0000000000291000-memory.dmp

          Filesize

          4KB

        • memory/1724-56-0x00000000003B0000-0x00000000003F8000-memory.dmp

          Filesize

          288KB