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Resubmissions

07/12/2024, 15:27

241207-svzd1swncx 10

07/12/2024, 14:25

241207-rrbm4szpdq 10

Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    07/12/2024, 14:25

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 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 10 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:2012
    • 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:4228
      • 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:2072
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp74F1.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4504
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3536
      • 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:4240

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp74F1.tmp.bat

    Filesize

    178B

    MD5

    19365438f5059b2d6c35033cb7fabad0

    SHA1

    348e684f63a41cd5cc18bea2e9a989f540a41344

    SHA256

    329000d62aa6eac4719692f42d08697bc0273563cc3dcef494f5908d8d1ac36d

    SHA512

    38184735cd75d1c39b9d8c4953e6f096ac8d1fc3d7177356d9017c377c7ce6d4d8611a77784640f0dd9947a46d6e30415874437712cc386b2ef7336a792cb4d1

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

    Filesize

    48KB

    MD5

    77ca225fb7c84aad1e8ee9ead0110b4c

    SHA1

    b26e40f8e945f4db6621d7ca5a575a84c0565f91

    SHA256

    716b12fa63c467b57e24182ae3af25b738fc589f3f4f0aa5c516190f3eefbf00

    SHA512

    e8f2138cd82714ba58a30d9b48c7e61a6c42b17db297c332e078db544575404382ccf16dbd5bd0aced9342186b05b65a1da0426062b10729a40123a5887e3bbb

  • memory/2012-0-0x00007FFEE8773000-0x00007FFEE8775000-memory.dmp

    Filesize

    8KB

  • memory/2012-1-0x0000000000A30000-0x0000000000A42000-memory.dmp

    Filesize

    72KB

  • memory/2012-2-0x00007FFEE8770000-0x00007FFEE9232000-memory.dmp

    Filesize

    10.8MB

  • memory/2012-7-0x00007FFEE8770000-0x00007FFEE9232000-memory.dmp

    Filesize

    10.8MB