Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    17-05-2024 14:55

General

  • Target

    2b953a27fe875c8394d05347a5d11d14.exe

  • Size

    109KB

  • MD5

    2b953a27fe875c8394d05347a5d11d14

  • SHA1

    c4976290e6ec103671e7709abbed1a92c7c9b0a2

  • SHA256

    502d5f5c411a1eeec35a874336b32d35502abb31afd202ad66bd9b2bc341307f

  • SHA512

    5e62c4f031a05d4b3d8bc21b65d9d784de8eb759e13fe4ca9069c1c3520a8b0dcca964e1e39a6c38267d488f46a9986beb2161468dc5bc4ad1ff7313485ddf6e

  • SSDEEP

    3072:Foiy0nuMAXQF6PIZEDlY+9TXxzQ+HsKWbmFq5:Foinzot84umF

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

Mutex

0pe3F2LrSSkk

Attributes
  • delay

    3

  • install

    true

  • install_file

    Fluxus Folder.exe

  • install_folder

    %AppData%

  • pastebin_config

    https://pastebin.com/raw/qdzaTTaM

aes.plain

Signatures

  • AsyncRat

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

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2b953a27fe875c8394d05347a5d11d14.exe
    "C:\Users\Admin\AppData\Local\Temp\2b953a27fe875c8394d05347a5d11d14.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2748
    • C:\Users\Admin\AppData\Local\Temp\2b953a27fe875c8394d05347a5d11d14.exe
      "C:\Users\Admin\AppData\Local\Temp\2b953a27fe875c8394d05347a5d11d14.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2572
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Fluxus Folder" /tr '"C:\Users\Admin\AppData\Roaming\Fluxus Folder.exe"' & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2736
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /f /sc onlogon /rl highest /tn "Fluxus Folder" /tr '"C:\Users\Admin\AppData\Roaming\Fluxus Folder.exe"'
          4⤵
          • Creates scheduled task(s)
          PID:2464
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp7974.tmp.bat""
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:2512
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • Delays execution with timeout.exe
          PID:2500
        • C:\Users\Admin\AppData\Roaming\Fluxus Folder.exe
          "C:\Users\Admin\AppData\Roaming\Fluxus Folder.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:2180
          • C:\Users\Admin\AppData\Roaming\Fluxus Folder.exe
            "C:\Users\Admin\AppData\Roaming\Fluxus Folder.exe"
            5⤵
            • Executes dropped EXE
            • Modifies system certificate store
            • Suspicious use of AdjustPrivilegeToken
            PID:2772

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357

    Filesize

    1KB

    MD5

    a266bb7dcc38a562631361bbf61dd11b

    SHA1

    3b1efd3a66ea28b16697394703a72ca340a05bd5

    SHA256

    df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e

    SHA512

    0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357

    Filesize

    242B

    MD5

    a3698a737056a2a0ada33cbe1c6c9c8f

    SHA1

    b8a1ad892188608073b4bf6ce55d0ad3b1b6ece1

    SHA256

    ea0bfb66b15de49ce9d87bd59daf22e042d85f09a38a0038f83e68596b9e715c

    SHA512

    518bf7d4cd8558b31d245fea21a6df07a2c5431bf844a4f2711b96656608dee229606bbff90767aaf40e2c306f4d256ed9549efdd04e160f4bf9220ed4c538ac

  • C:\Users\Admin\AppData\Local\Temp\Tar100D.tmp

    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

  • C:\Users\Admin\AppData\Local\Temp\tmp7974.tmp.bat

    Filesize

    157B

    MD5

    172b549f9ca092cf667e51c451fba891

    SHA1

    2e738d0a729f8b6b525d60b01ed98e7e81dce215

    SHA256

    2144e338489c9ee292dae49dfd5fb9b8e603d99d17544a6e98d8b9e28e1009b5

    SHA512

    48bdaef285cc103489eccbb7b1a572db41dd232d3f72eb8a17f6f2fab19dbee00ca15b541825b53468e7c9b158f780b208b3f0b64cebe297a8be365b8a3a6004

  • \Users\Admin\AppData\Roaming\Fluxus Folder.exe

    Filesize

    109KB

    MD5

    2b953a27fe875c8394d05347a5d11d14

    SHA1

    c4976290e6ec103671e7709abbed1a92c7c9b0a2

    SHA256

    502d5f5c411a1eeec35a874336b32d35502abb31afd202ad66bd9b2bc341307f

    SHA512

    5e62c4f031a05d4b3d8bc21b65d9d784de8eb759e13fe4ca9069c1c3520a8b0dcca964e1e39a6c38267d488f46a9986beb2161468dc5bc4ad1ff7313485ddf6e

  • memory/2180-36-0x0000000001350000-0x0000000001372000-memory.dmp

    Filesize

    136KB

  • memory/2572-20-0x00000000745E0000-0x0000000074CCE000-memory.dmp

    Filesize

    6.9MB

  • memory/2572-31-0x00000000745E0000-0x0000000074CCE000-memory.dmp

    Filesize

    6.9MB

  • memory/2572-17-0x0000000000400000-0x000000000041C000-memory.dmp

    Filesize

    112KB

  • memory/2572-8-0x0000000000400000-0x000000000041C000-memory.dmp

    Filesize

    112KB

  • memory/2572-15-0x0000000000400000-0x000000000041C000-memory.dmp

    Filesize

    112KB

  • memory/2572-12-0x0000000000400000-0x000000000041C000-memory.dmp

    Filesize

    112KB

  • memory/2572-6-0x0000000000400000-0x000000000041C000-memory.dmp

    Filesize

    112KB

  • memory/2572-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2572-19-0x0000000000400000-0x000000000041C000-memory.dmp

    Filesize

    112KB

  • memory/2572-22-0x00000000745E0000-0x0000000074CCE000-memory.dmp

    Filesize

    6.9MB

  • memory/2572-10-0x0000000000400000-0x000000000041C000-memory.dmp

    Filesize

    112KB

  • memory/2748-21-0x00000000745E0000-0x0000000074CCE000-memory.dmp

    Filesize

    6.9MB

  • memory/2748-0-0x00000000745EE000-0x00000000745EF000-memory.dmp

    Filesize

    4KB

  • memory/2748-5-0x0000000000400000-0x0000000000420000-memory.dmp

    Filesize

    128KB

  • memory/2748-4-0x00000000745E0000-0x0000000074CCE000-memory.dmp

    Filesize

    6.9MB

  • memory/2748-3-0x00000000745EE000-0x00000000745EF000-memory.dmp

    Filesize

    4KB

  • memory/2748-2-0x00000000745E0000-0x0000000074CCE000-memory.dmp

    Filesize

    6.9MB

  • memory/2748-1-0x0000000001220000-0x0000000001242000-memory.dmp

    Filesize

    136KB

  • memory/2772-48-0x0000000000400000-0x000000000041C000-memory.dmp

    Filesize

    112KB

  • memory/2772-45-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2772-50-0x0000000000400000-0x000000000041C000-memory.dmp

    Filesize

    112KB