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Analysis

  • max time kernel
    161s
  • max time network
    177s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/10/2023, 19:14

General

  • Target

    7e1974ea77e2416b2ac75656d1e24da59de0af97815a9e337e4a7cc58f6339a4_JC.exe

  • Size

    48KB

  • MD5

    39fb8a8a40c829ac3a4fd5cd6ea473b7

  • SHA1

    5930195043f8a59566d778d15acb31d3c3e5c3a8

  • SHA256

    7e1974ea77e2416b2ac75656d1e24da59de0af97815a9e337e4a7cc58f6339a4

  • SHA512

    e6d3074a3f2c8d474818d1611d36990b4ab9467f5ffe983ef7572414870c2802e2f353aa02579044c7b51e482bac23424bed9767b8fbb0c41ed16dd328b2beaa

  • SSDEEP

    1536:euWk5T1gi29npmgpzmyb+M/oLnOA5UtGhdIR:euWET1gi29pmgpzmyb+/Ld6tI+R

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Rust

C2

extra-hack.ddns.net:2550

extra-hack.ddns.net:2551

extra-hack.ddns.net:2552

extra-hack.ddns.net:2553

extra-hack.ddns.net:2554

extra-hack.ddns.net:2555

extra-hack.ddns.net:2556

extra-hack.ddns.net:2557

extra-hack.ddns.net:2558

extra-hack.ddns.net:2559

extra-hack.ddns.net:2560

extra-hack.ddns.net:2561

extra-hack.ddns.net:2562

extra-hack.ddns.net:2563

extra-hack.ddns.net:2564

extra-hack.ddns.net:2565

extra-hack.ddns.net:2566

extra-hack.ddns.net:2567

extra-hack.ddns.net:2568

extra-hack.ddns.net:2569

Mutex

j4hy8gsf6w53x4

Attributes
  • delay

    3

  • install

    true

  • install_file

    Realtek HD Audio Universal Service.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 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
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7e1974ea77e2416b2ac75656d1e24da59de0af97815a9e337e4a7cc58f6339a4_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\7e1974ea77e2416b2ac75656d1e24da59de0af97815a9e337e4a7cc58f6339a4_JC.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:768
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Realtek HD Audio Universal Service" /tr '"C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Service.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:472
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Realtek HD Audio Universal Service" /tr '"C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Service.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:2292
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp87A5.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2076
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2776
      • C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Service.exe
        "C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Service.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:372

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp87A5.tmp.bat

    Filesize

    178B

    MD5

    9bb1a513c2e794e67a7e4868a01ebcab

    SHA1

    4cef45de720261d41bf6011d7b2e62a2b9193c7e

    SHA256

    7d3f9db20c9e8595dce0ea425d775ad4d6c2b90658b8f00a595422562340c09f

    SHA512

    44c9a14ce2cea8e0cb585a860457e62d07c4db7995428f242dbca31cc4a7fcf391074e0720a80437dbb93832366a49ab767d68821bbaf557ea02b80c1729242e

  • C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Service.exe

    Filesize

    48KB

    MD5

    39fb8a8a40c829ac3a4fd5cd6ea473b7

    SHA1

    5930195043f8a59566d778d15acb31d3c3e5c3a8

    SHA256

    7e1974ea77e2416b2ac75656d1e24da59de0af97815a9e337e4a7cc58f6339a4

    SHA512

    e6d3074a3f2c8d474818d1611d36990b4ab9467f5ffe983ef7572414870c2802e2f353aa02579044c7b51e482bac23424bed9767b8fbb0c41ed16dd328b2beaa

  • C:\Users\Admin\AppData\Roaming\Realtek HD Audio Universal Service.exe

    Filesize

    48KB

    MD5

    39fb8a8a40c829ac3a4fd5cd6ea473b7

    SHA1

    5930195043f8a59566d778d15acb31d3c3e5c3a8

    SHA256

    7e1974ea77e2416b2ac75656d1e24da59de0af97815a9e337e4a7cc58f6339a4

    SHA512

    e6d3074a3f2c8d474818d1611d36990b4ab9467f5ffe983ef7572414870c2802e2f353aa02579044c7b51e482bac23424bed9767b8fbb0c41ed16dd328b2beaa

  • memory/372-20-0x0000000006170000-0x0000000006714000-memory.dmp

    Filesize

    5.6MB

  • memory/372-19-0x0000000002CD0000-0x0000000002CE0000-memory.dmp

    Filesize

    64KB

  • memory/372-18-0x0000000075100000-0x00000000758B0000-memory.dmp

    Filesize

    7.7MB

  • memory/372-17-0x0000000002CD0000-0x0000000002CE0000-memory.dmp

    Filesize

    64KB

  • memory/372-16-0x0000000075100000-0x00000000758B0000-memory.dmp

    Filesize

    7.7MB

  • memory/768-4-0x0000000004B00000-0x0000000004B10000-memory.dmp

    Filesize

    64KB

  • memory/768-12-0x00000000751A0000-0x0000000075950000-memory.dmp

    Filesize

    7.7MB

  • memory/768-6-0x00000000050A0000-0x000000000513C000-memory.dmp

    Filesize

    624KB

  • memory/768-5-0x0000000004C10000-0x0000000004C76000-memory.dmp

    Filesize

    408KB

  • memory/768-0-0x00000000751A0000-0x0000000075950000-memory.dmp

    Filesize

    7.7MB

  • memory/768-3-0x0000000004B00000-0x0000000004B10000-memory.dmp

    Filesize

    64KB

  • memory/768-2-0x00000000751A0000-0x0000000075950000-memory.dmp

    Filesize

    7.7MB

  • memory/768-1-0x0000000000150000-0x0000000000162000-memory.dmp

    Filesize

    72KB