Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    28-09-2024 04:50

General

  • Target

    First.exe

  • Size

    21KB

  • MD5

    c1d6e0a7cb5f59781fe6fb8e28b9c3e6

  • SHA1

    ea12f2eb7216851d488b694c3ed72040e236b67c

  • SHA256

    3daacb3f869e6a293c943fe782d480129c831c6aeeca408e17dd7ba5255e3983

  • SHA512

    fb8d04c043077b9908baf5913356c55c91944d0c452ece8716327f996b504fa7cd9d6104668069055c6b8285b1df2af5892f18c8e59c11cb4b9fc74e7d5d54a2

  • SSDEEP

    384:IDRQmNZSqPDyqXVQmXNQltXpQyXlQx/uoOQtGQmXE9RrA5SX7jd2Szli5lG7NqPa:Za32tzclrVLjdbi5lGMVA3g

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:7777

45.137.198.159:7777

Mutex

pgUcrHSbq2HY

Attributes
  • delay

    3

  • install

    true

  • install_file

    123987.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs
  • Async RAT payload 1 IoCs
  • Disables Task Manager via registry modification
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Delays execution with timeout.exe 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • System policy modification 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\First.exe
    "C:\Users\Admin\AppData\Local\Temp\First.exe"
    1⤵
    • Modifies Windows Defender Real-time Protection settings
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2712
    • C:\Users\Admin\AppData\Roaming\Main.exe
      "C:\Users\Admin\AppData\Roaming\Main.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1688
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "123987" /tr '"C:\Users\Admin\AppData\Roaming\123987.exe"' & exit
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1116
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /f /sc onlogon /rl highest /tn "123987" /tr '"C:\Users\Admin\AppData\Roaming\123987.exe"'
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:2152
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1880.tmp.bat""
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2072
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:648
        • C:\Users\Admin\AppData\Roaming\123987.exe
          "C:\Users\Admin\AppData\Roaming\123987.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:2916

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp1880.tmp.bat

    Filesize

    150B

    MD5

    9c6442b8f7a4cc2e127afd212dd2448a

    SHA1

    7a9055be7ec3e3eac1b11a109739a73bb853af60

    SHA256

    35ed2cffed05cf160249a76bb906eb50eb907d966f30d15e043ccb602f488789

    SHA512

    6629a9363c54d86b816b6221e3730b44eef00092d8ccbba3b43ba2b6b1333a88119c667af8b1113aca5a250a9be6f9dbfabc69c5cb2fbdfe0a2ceeaf0b7c2674

  • C:\Users\Admin\AppData\Roaming\Main.exe

    Filesize

    45KB

    MD5

    ec18d00e2e6081e86545a04c9cb4f574

    SHA1

    469de216b8b68cef615921cfe3bcf3464ca2b4fa

    SHA256

    6718034ff0bb979bfe7e73baad3eecf86e43ce1edf22d357143d6077eb882b71

    SHA512

    950c8c81cddca030958fc9ec8a9f09239a56c0965aa3d89512c6baf427ad650332aedca0cc792927ae6dbdf98c42710fb5f7d41f6b43a7a6b2ddf3fcd3105cd6

  • memory/1688-29-0x000000007420E000-0x000000007420F000-memory.dmp

    Filesize

    4KB

  • memory/1688-30-0x0000000001050000-0x0000000001062000-memory.dmp

    Filesize

    72KB

  • memory/1688-31-0x0000000074200000-0x00000000748EE000-memory.dmp

    Filesize

    6.9MB

  • memory/1688-40-0x0000000074200000-0x00000000748EE000-memory.dmp

    Filesize

    6.9MB

  • memory/2916-45-0x00000000010D0000-0x00000000010E2000-memory.dmp

    Filesize

    72KB