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Analysis

  • max time kernel
    135s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    14/12/2024, 17:14

General

  • Target

    newClient.exe

  • Size

    63KB

  • MD5

    850f69a366c31db03ec8712b336f9fbd

  • SHA1

    9afdce442ef056c44cab85027b80d0f56bb65f79

  • SHA256

    1ad7ca994dc657ad56db324539251cacc030481d894351dd9e28575afd67c265

  • SHA512

    ef7014b9d8fb39dabea401d7acc9fd9c55c6aa1900c47743f6ae733dc71a2feaee5eccec0148bd6b9bb9edef681f9d5c0ac1c3d872b7cd02941047920731b28b

  • SSDEEP

    1536:F8iDBlH6vPpRjK0GbbRwVHv+Kr7qG7FZVclN:amlH6vPLjnGbbR62KPzY

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:7707

127.0.0.1:31576

yeswasdwasdwasd-31576.portmap.host:7707

yeswasdwasdwasd-31576.portmap.host:31576

Mutex

roaroaroaraoroaroaraoraoraoarororrohrorororoaroaaoaoaoaroaroar

Attributes
  • delay

    1

  • install

    true

  • install_file

    windows defender firewall.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Asyncrat family
  • Async RAT payload 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 15 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\newClient.exe
    "C:\Users\Admin\AppData\Local\Temp\newClient.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2848
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1148
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1576
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpDBED.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2320
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2692
      • C:\Users\Admin\AppData\Roaming\windows defender firewall.exe
        "C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:2816

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    169B

    MD5

    8da758506c4d1c379518a33a0e31ec08

    SHA1

    5a84f1e5b17ed3e21e54c8a46adc564876939ead

    SHA256

    1d3d87cf91efc7767b969967b4011fba4309f5fe306eb7b2b604341f9abbef47

    SHA512

    64516d111b040f0109fb1cdd49fffa41560ca361d563b0ea26d03069444e1a3ffb72a429ed5d4b5fd71d7165084acf439ffe545794c733a8887900e92d2cd7e6

  • C:\Users\Admin\AppData\Roaming\windows defender firewall.exe

    Filesize

    63KB

    MD5

    850f69a366c31db03ec8712b336f9fbd

    SHA1

    9afdce442ef056c44cab85027b80d0f56bb65f79

    SHA256

    1ad7ca994dc657ad56db324539251cacc030481d894351dd9e28575afd67c265

    SHA512

    ef7014b9d8fb39dabea401d7acc9fd9c55c6aa1900c47743f6ae733dc71a2feaee5eccec0148bd6b9bb9edef681f9d5c0ac1c3d872b7cd02941047920731b28b

  • memory/2816-17-0x0000000000240000-0x0000000000256000-memory.dmp

    Filesize

    88KB

  • memory/2848-0-0x000007FEF5BE3000-0x000007FEF5BE4000-memory.dmp

    Filesize

    4KB

  • memory/2848-1-0x0000000000050000-0x0000000000066000-memory.dmp

    Filesize

    88KB

  • memory/2848-2-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

    Filesize

    9.9MB

  • memory/2848-3-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

    Filesize

    9.9MB

  • memory/2848-13-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

    Filesize

    9.9MB