Analysis

  • max time kernel
    121s
  • max time network
    140s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    15-05-2024 01:15

General

  • Target

    3d75eede311931faf4dc46008199f7dc49a42237388ac8471c3a5a07432fb243.exe

  • Size

    308KB

  • MD5

    1ee185cb3b4f78f2a24e61798952178b

  • SHA1

    8049b95b5250bad311950a218de4b9727e8f4579

  • SHA256

    3d75eede311931faf4dc46008199f7dc49a42237388ac8471c3a5a07432fb243

  • SHA512

    d16938efe9ec9936266e9c37b9c85b5f26cdfc66cc9c552186c3973ebed1c7e9f0f9f380f39cc113c03e7983dd9188a5e7292115748d78953101cfd359f0a93f

  • SSDEEP

    3072:iOvQ/IaGuDfIeqpMTxV/wP8rjAILNnCDDRvLGmrOAOkGt6+duWA/t/SHUebbxCbO:FQIZe+MFVXx9stvLGtELbMUTKZ1H

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

April3rd2024

C2

94.156.65.181:3434

Mutex

A234sdgrgMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • AsyncRat

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

  • Detect ZGRat V1 34 IoCs
  • ZGRat

    ZGRat is remote access trojan written in C#.

  • Async RAT payload 1 IoCs
  • Detect packed .NET executables. Mostly AgentTeslaV4. 3 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 3 IoCs
  • Detects executables referencing Windows vault credential objects. Observed in infostealers 3 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 3 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 3 IoCs
  • Detects executables referencing many file transfer clients. Observed in information stealers 3 IoCs
  • Detects file containing reversed ASEP Autorun registry keys 3 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • 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 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3d75eede311931faf4dc46008199f7dc49a42237388ac8471c3a5a07432fb243.exe
    "C:\Users\Admin\AppData\Local\Temp\3d75eede311931faf4dc46008199f7dc49a42237388ac8471c3a5a07432fb243.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2904
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:3384
      • C:\Users\Admin\AppData\Local\Temp\FB_BB63.tmp.exe
        "C:\Users\Admin\AppData\Local\Temp\FB_BB63.tmp.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3500
      • C:\Users\Admin\AppData\Local\Temp\FB_BC9C.tmp.exe
        "C:\Users\Admin\AppData\Local\Temp\FB_BC9C.tmp.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:3536

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Cab2B85.tmp

    Filesize

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

  • \Users\Admin\AppData\Local\Temp\FB_BB63.tmp.exe

    Filesize

    237KB

    MD5

    8c4c985b5719d0acadafb2cc03f0e86e

    SHA1

    0e0644087a29575b5c4a1d3b76a79cf95c577d7b

    SHA256

    a2007da837ca22cd0e894946f9ce20a3352ac42c34c5930c159730ea4538e79b

    SHA512

    8255101de0ed591128c5d093cd683193a24f5044fc297e6e51ae58714b121164b480c9868c477c24d653a231dc17db4c5f78de9ccc084e14133cc95e14e6219c

  • \Users\Admin\AppData\Local\Temp\FB_BC9C.tmp.exe

    Filesize

    45KB

    MD5

    ac190c9e687b2c110354d3809d32a57d

    SHA1

    3fdfeca134e469f6ac42e03b3d39359313fb36fc

    SHA256

    6c0291916555438da7d3705991100d295d480ae58b98147a4d83fbd3cfb8dc19

    SHA512

    161ae735acf5b60c6c906c1b0223838987a24cbb410623af2495b31e2e663561a6ecf1ad5f08956a6fb2134ebd32aaaa1573bae7e1c4abdfb7fb0ca8b2a9ecb5

  • memory/2904-0-0x000000007420E000-0x000000007420F000-memory.dmp

    Filesize

    4KB

  • memory/2904-1-0x0000000000F40000-0x0000000000F90000-memory.dmp

    Filesize

    320KB

  • memory/2904-2-0x0000000074200000-0x00000000748EE000-memory.dmp

    Filesize

    6.9MB

  • memory/2904-3-0x00000000085F0000-0x0000000008826000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-4-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-7-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-15-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-25-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-23-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-21-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-19-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-17-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-13-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-11-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-9-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-5-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-27-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-37-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-61-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-67-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-65-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-63-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-59-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-57-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-55-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-53-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-51-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-49-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-47-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-45-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-43-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-41-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-39-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-35-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-33-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-31-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-29-0x00000000085F0000-0x0000000008820000-memory.dmp

    Filesize

    2.2MB

  • memory/2904-4885-0x00000000057E0000-0x000000000582C000-memory.dmp

    Filesize

    304KB

  • memory/2904-4884-0x00000000052A0000-0x0000000005312000-memory.dmp

    Filesize

    456KB

  • memory/2904-4886-0x0000000074200000-0x00000000748EE000-memory.dmp

    Filesize

    6.9MB

  • memory/2904-4887-0x000000007420E000-0x000000007420F000-memory.dmp

    Filesize

    4KB

  • memory/2904-4888-0x0000000074200000-0x00000000748EE000-memory.dmp

    Filesize

    6.9MB

  • memory/2904-4889-0x0000000005530000-0x0000000005584000-memory.dmp

    Filesize

    336KB

  • memory/2904-4909-0x0000000074200000-0x00000000748EE000-memory.dmp

    Filesize

    6.9MB

  • memory/3384-4910-0x0000000000400000-0x000000000044B000-memory.dmp

    Filesize

    300KB

  • memory/3500-4923-0x0000000000D40000-0x0000000000D82000-memory.dmp

    Filesize

    264KB

  • memory/3536-4925-0x0000000000220000-0x0000000000232000-memory.dmp

    Filesize

    72KB