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Analysis

  • max time kernel
    144s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    07/12/2024, 15:34

General

  • Target

    Client.exe

  • Size

    48KB

  • MD5

    77ca225fb7c84aad1e8ee9ead0110b4c

  • SHA1

    b26e40f8e945f4db6621d7ca5a575a84c0565f91

  • SHA256

    716b12fa63c467b57e24182ae3af25b738fc589f3f4f0aa5c516190f3eefbf00

  • SHA512

    e8f2138cd82714ba58a30d9b48c7e61a6c42b17db297c332e078db544575404382ccf16dbd5bd0aced9342186b05b65a1da0426062b10729a40123a5887e3bbb

  • SSDEEP

    768:ywpRILv+sx+LiEtelDSN+iV08YbygeYslsoo7RSYFr0bvEgK/JfZVc6KN:ywcpEtKDs4zb10rqjF4nkJfZVclN

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:8848

127.0.0.1:59953

fojeweb571-59953.portmap.host:8848

fojeweb571-59953.portmap.host:59953

Mutex

DcRatMutex_qwqdanchun

Attributes
  • delay

    1

  • install

    true

  • install_file

    windows defender firewall required.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\Client.exe
    "C:\Users\Admin\AppData\Local\Temp\Client.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:576
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall required" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2300
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall required" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2440
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpDC3B.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:768
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2752
      • C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe
        "C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:2832

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpDC3B.tmp.bat

    Filesize

    178B

    MD5

    71bab9dfe37f64ad942d0e644f0dd796

    SHA1

    768529fa34785f77ec4a581b644d6c65864909b6

    SHA256

    7ec1ef2f0efd4de49c35afca40e2dd51cdbe78ba09c770277964f072fb2f7b24

    SHA512

    c9b7578f47af0b7e60050610204315232678b544e8443a84a3c3d3e8cd7f6186c77b0564cfa281f3b4c65a7ec74388638aa6a9ccb6ca287df8a49ecd26a8e6ff

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

    Filesize

    48KB

    MD5

    77ca225fb7c84aad1e8ee9ead0110b4c

    SHA1

    b26e40f8e945f4db6621d7ca5a575a84c0565f91

    SHA256

    716b12fa63c467b57e24182ae3af25b738fc589f3f4f0aa5c516190f3eefbf00

    SHA512

    e8f2138cd82714ba58a30d9b48c7e61a6c42b17db297c332e078db544575404382ccf16dbd5bd0aced9342186b05b65a1da0426062b10729a40123a5887e3bbb

  • memory/576-0-0x000007FEF5B13000-0x000007FEF5B14000-memory.dmp

    Filesize

    4KB

  • memory/576-1-0x0000000000240000-0x0000000000252000-memory.dmp

    Filesize

    72KB

  • memory/576-2-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

    Filesize

    9.9MB

  • memory/576-11-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

    Filesize

    9.9MB

  • memory/2832-16-0x0000000000ED0000-0x0000000000EE2000-memory.dmp

    Filesize

    72KB