Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-04-2024 23:09

General

  • Target

    AsyncClient.exe

  • Size

    48KB

  • MD5

    0712481ec7be68e2f67672b911aebf23

  • SHA1

    527ceb23db13a4e84b5f27a850116bb1421981dd

  • SHA256

    6a26dc7c12eddcdc36e00ca1633eb4f231a433deee4f574122c51690f28a3e67

  • SHA512

    bce33d4a59624ccee236df8b3ff061bd58377dee284e44849471e7afdd9baf7845a91dc9701647ce9290ea13c3f18ca2bda780dce646a28b3c1436ad78d248cd

  • SSDEEP

    768:/uwhFTAY3IQWUe9jqmo2qLwjbovXejeM8emPISZrul5UrM0bfg02Gzd6jq7eDZyG:/uwhFTA4/2pjboOehAgruYrfbfAGzMqQ

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

report-dust.gl.at.ply.gg:28329

report-dust.gl.at.ply.gg:8188

Mutex

9VMpESMh922h

Attributes
  • delay

    3

  • install

    true

  • install_file

    Svchost.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 1 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 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3380
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Svchost" /tr '"C:\Users\Admin\AppData\Roaming\Svchost.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:400
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Svchost" /tr '"C:\Users\Admin\AppData\Roaming\Svchost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:4708
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp703E.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4904
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2132
      • C:\Users\Admin\AppData\Roaming\Svchost.exe
        "C:\Users\Admin\AppData\Roaming\Svchost.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:4336

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp703E.tmp.bat

    Filesize

    151B

    MD5

    1c6805d42cc4d4a280f742529cee9291

    SHA1

    07a7e626cf87a9431d390f108d2a533c26c08354

    SHA256

    b8d0e9548593ed257b42c15c21831df5f4c5708ba50cdf8c0d6bc54f0a163543

    SHA512

    1818b72086861a750f542885af84641c358cba49ea7c3f8a4d17ae857ed3f02599b4a0afbc9714b0400989a88c65bb5f178a3af844d59253da114ecb40af927a

  • C:\Users\Admin\AppData\Roaming\Svchost.exe

    Filesize

    48KB

    MD5

    0712481ec7be68e2f67672b911aebf23

    SHA1

    527ceb23db13a4e84b5f27a850116bb1421981dd

    SHA256

    6a26dc7c12eddcdc36e00ca1633eb4f231a433deee4f574122c51690f28a3e67

    SHA512

    bce33d4a59624ccee236df8b3ff061bd58377dee284e44849471e7afdd9baf7845a91dc9701647ce9290ea13c3f18ca2bda780dce646a28b3c1436ad78d248cd

  • memory/3380-1-0x0000000074610000-0x0000000074DC0000-memory.dmp

    Filesize

    7.7MB

  • memory/3380-0-0x0000000000360000-0x0000000000372000-memory.dmp

    Filesize

    72KB

  • memory/3380-2-0x0000000004D70000-0x0000000004D80000-memory.dmp

    Filesize

    64KB

  • memory/3380-3-0x0000000004E80000-0x0000000004F1C000-memory.dmp

    Filesize

    624KB

  • memory/3380-8-0x0000000074610000-0x0000000074DC0000-memory.dmp

    Filesize

    7.7MB

  • memory/4336-13-0x0000000074560000-0x0000000074D10000-memory.dmp

    Filesize

    7.7MB

  • memory/4336-14-0x0000000074560000-0x0000000074D10000-memory.dmp

    Filesize

    7.7MB