Analysis

  • max time kernel
    60s
  • max time network
    64s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-05-2023 14:06

General

  • Target

    CraxsRat 4.0.1/CraxsRat 4.0.1.exe

  • Size

    3.4MB

  • MD5

    f873bee92e6118ff16b63b2a75173818

  • SHA1

    4061cab004813a12e8042b83228885dfbc88547f

  • SHA256

    7eba1b2ac702b41a3799b7c0c0a2a5a9da452e21fb847d0d8d0884f7705b5b4d

  • SHA512

    368858286de1b7a5509e3a6576f4b58919f1dbf73b97a39d1dc62faad797c15f7fbcd09cf6cc37cb138c00ecd138ae01abf93b02fa33ce86f658a2a8d213850f

  • SSDEEP

    49152:WWsTEkwghTKv4jysGUqgCoOtt1JKsgGViSe8KuAfG9b/KM:WFEkwghTKv4jysGUqgCxttdX8v/E

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.zoho.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Nescau71#

Signatures

  • HawkEye

    HawkEye is a malware kit that has seen continuous development since at least 2013.

  • NirSoft MailPassView 4 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 5 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 8 IoCs
  • Drops startup file 1 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\CraxsRat 4.0.1\CraxsRat 4.0.1.exe
    "C:\Users\Admin\AppData\Local\Temp\CraxsRat 4.0.1\CraxsRat 4.0.1.exe"
    1⤵
    • Drops startup file
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1320
    • C:\Users\Admin\AppData\Local\Temp\CraxsRat 4.0.1\CraxsRat 4.0.1.exe
      "C:\Users\Admin\AppData\Local\Temp\CraxsRat 4.0.1\CraxsRat 4.0.1.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2636
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holdermail.txt"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:768
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holderwb.txt"
        3⤵
          PID:988

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\CraxsRat 4.0.1.exe.log

      Filesize

      617B

      MD5

      99e770c0d4043aa84ef3d3cbc7723c25

      SHA1

      19829c5c413fccba750a3357f938dfa94486acad

      SHA256

      33c7dd4c852dae6462c701337f8e0a8647602847ccaee656fa6f1149cccfb5d5

      SHA512

      ba521e2f57d7e1db19445201948caa7af6d953e1c1340228934888f8ec05b8984ad492122d0bf0550b5e679614d8a713ecf68f91916ffa6e5d8f75bf003aae39

    • C:\Users\Admin\AppData\Local\Temp\holderwb.txt

      Filesize

      3KB

      MD5

      f94dc819ca773f1e3cb27abbc9e7fa27

      SHA1

      9a7700efadc5ea09ab288544ef1e3cd876255086

      SHA256

      a3377ade83786c2bdff5db19ff4dbfd796da4312402b5e77c4c63e38cc6eff92

      SHA512

      72a2c10d7a53a7f9a319dab66d77ed65639e9aa885b551e0055fc7eaf6ef33bbf109205b42ae11555a0f292563914bc6edb63b310c6f9bda9564095f77ab9196

    • memory/768-149-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/768-152-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/768-151-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/988-155-0x0000000000400000-0x0000000000458000-memory.dmp

      Filesize

      352KB

    • memory/988-157-0x0000000000400000-0x0000000000458000-memory.dmp

      Filesize

      352KB

    • memory/988-166-0x0000000000400000-0x0000000000458000-memory.dmp

      Filesize

      352KB

    • memory/988-162-0x0000000000400000-0x0000000000458000-memory.dmp

      Filesize

      352KB

    • memory/1320-133-0x0000000000E60000-0x00000000011D0000-memory.dmp

      Filesize

      3.4MB

    • memory/1320-135-0x00000000061C0000-0x0000000006764000-memory.dmp

      Filesize

      5.6MB

    • memory/1320-134-0x0000000005B70000-0x0000000005C0C000-memory.dmp

      Filesize

      624KB

    • memory/2636-140-0x00000000051D0000-0x0000000005262000-memory.dmp

      Filesize

      584KB

    • memory/2636-137-0x0000000000400000-0x0000000000484000-memory.dmp

      Filesize

      528KB

    • memory/2636-153-0x00000000053B0000-0x00000000053C0000-memory.dmp

      Filesize

      64KB

    • memory/2636-154-0x00000000053B0000-0x00000000053C0000-memory.dmp

      Filesize

      64KB

    • memory/2636-141-0x00000000050F0000-0x00000000050FA000-memory.dmp

      Filesize

      40KB

    • memory/2636-146-0x0000000008890000-0x00000000088F6000-memory.dmp

      Filesize

      408KB

    • memory/2636-143-0x00000000053B0000-0x00000000053C0000-memory.dmp

      Filesize

      64KB

    • memory/2636-161-0x00000000053B0000-0x00000000053C0000-memory.dmp

      Filesize

      64KB

    • memory/2636-142-0x0000000005420000-0x0000000005476000-memory.dmp

      Filesize

      344KB