Analysis

  • max time kernel
    118s
  • max time network
    127s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    11/02/2022, 23:36

General

  • Target

    e0949a201bce683fd955b895d6a80f2021fe83d5c7ba44ab0f0d16086683ced1.exe

  • Size

    3.6MB

  • MD5

    405596da338a003671a2cce91b018dd3

  • SHA1

    a44249e76d2b4eebc93e3d7f15c50b0fdad49fb1

  • SHA256

    e0949a201bce683fd955b895d6a80f2021fe83d5c7ba44ab0f0d16086683ced1

  • SHA512

    24fe1ff764fa9483cc6fa4595b397dd95cb549920713ee0a91a980bd58c40282a103518c950691650921bcfaff29ab17213524f16f871f4c45ee96cff6e2e687

Malware Config

Extracted

Family

cryptbot

C2

sezwex34.top

morswd03.top

Signatures

  • CryptBot

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

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 11 IoCs
  • Drops file in Program Files directory 6 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 behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e0949a201bce683fd955b895d6a80f2021fe83d5c7ba44ab0f0d16086683ced1.exe
    "C:\Users\Admin\AppData\Local\Temp\e0949a201bce683fd955b895d6a80f2021fe83d5c7ba44ab0f0d16086683ced1.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:1632
    • C:\Program Files (x86)\repent1\Setup.exe
      "C:\Program Files (x86)\repent1\Setup.exe"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:1060
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\laqIfvYcm & timeout 4 & del /f /q "C:\Program Files (x86)\repent1\Setup.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1812
        • C:\Windows\SysWOW64\timeout.exe
          timeout 4
          4⤵
          • Delays execution with timeout.exe
          PID:944
    • C:\Program Files (x86)\repent1\KMSpico.exe
      "C:\Program Files (x86)\repent1\KMSpico.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:668
      • C:\Users\Admin\AppData\Local\Temp\is-NISRV.tmp\KMSpico.tmp
        "C:\Users\Admin\AppData\Local\Temp\is-NISRV.tmp\KMSpico.tmp" /SL5="$90152,2952592,69120,C:\Program Files (x86)\repent1\KMSpico.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: GetForegroundWindowSpam
        PID:1644

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/668-68-0x0000000000400000-0x0000000000417000-memory.dmp

          Filesize

          92KB

        • memory/668-80-0x0000000000401000-0x000000000040B000-memory.dmp

          Filesize

          40KB

        • memory/1060-77-0x0000000000400000-0x0000000000564000-memory.dmp

          Filesize

          1.4MB

        • memory/1060-78-0x0000000000A40000-0x0000000000A88000-memory.dmp

          Filesize

          288KB

        • memory/1632-55-0x0000000075801000-0x0000000075803000-memory.dmp

          Filesize

          8KB

        • memory/1644-79-0x0000000000240000-0x0000000000241000-memory.dmp

          Filesize

          4KB