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Overview

overview

10

Static

static

10

AsyncClient.exe

windows7-x64

10

AsyncClient.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    144s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/07/2024, 01:23

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General

  • Target

    AsyncClient.exe

  • Size

    47KB

  • MD5

    b600b84e2c0d59eec1edf643e07c529f

  • SHA1

    2541870884411c007991150f21fe0ff814041e13

  • SHA256

    c1000bb63421d408df4d0b3869163a95d33c1682b14a3710a41aec00c986ea3e

  • SHA512

    7372e3708a66de6eee1f9ebf9b9761f566c8c1fcdca79aa5ce21cf62593035623cf5a49386194b3cd57f5a5a4c5ba0c74e0277dec7b4b598a9e6f8806634b355

  • SSDEEP

    768:suI1tT/w70kWUquzumo2qzj2OUM0EtE/43aPINPW98HxC0bsIpz461ochiX/Sjo2:suI1tT/kW2euEtEgjN5HfbsIesof//dW

Score
10/10
asyncratdefaultrat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808
Mutex

wv97guKzbU2n

Attributes
  • delay

    3

  • install

    true

  • install_file

    Issas.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

    ratasyncrat
  • Async RAT payload 1 IoCs
    rat
  • 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).

  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • 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:1744
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Issas" /tr '"C:\Users\Admin\AppData\Roaming\Issas.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3424
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Issas" /tr '"C:\Users\Admin\AppData\Roaming\Issas.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3956
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA76B.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3012
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:5104
      • C:\Users\Admin\AppData\Roaming\Issas.exe
        "C:\Users\Admin\AppData\Roaming\Issas.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:5008

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpA76B.tmp.bat
    Filesize

    149B

    MD5

    10c40f49b5ec574acd10d6d42ac1995d

    SHA1

    6b9e2fccc430b7eb1daaa3ba674b7453b7c24fe5

    SHA256

    1a4ac1adce6fa0fb3e514612346833164b4460985e6b5495cc70ccc6bd6fd0c1

    SHA512

    07ce27baecb3df21e481ab7407074672ff5de0acec573758ae04bd3c0f023bbc0ac0dabba5beb4c76e0d7591a01b0bb0234f3d6d4c9b3385c1117b12f69af949

    Download Submit

  • C:\Users\Admin\AppData\Roaming\Issas.exe
    Filesize

    47KB

    MD5

    b600b84e2c0d59eec1edf643e07c529f

    SHA1

    2541870884411c007991150f21fe0ff814041e13

    SHA256

    c1000bb63421d408df4d0b3869163a95d33c1682b14a3710a41aec00c986ea3e

    SHA512

    7372e3708a66de6eee1f9ebf9b9761f566c8c1fcdca79aa5ce21cf62593035623cf5a49386194b3cd57f5a5a4c5ba0c74e0277dec7b4b598a9e6f8806634b355

    Download Submit

  • memory/1744-0-0x0000000074FEE000-0x0000000074FEF000-memory.dmp

    Filesize

    4KB

    Download

  • memory/1744-1-0x0000000000840000-0x0000000000852000-memory.dmp

    Filesize

    72KB

    Download

  • memory/1744-2-0x0000000074FE0000-0x0000000075790000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/1744-3-0x0000000005220000-0x00000000052BC000-memory.dmp

    Filesize

    624KB

    Download

  • memory/1744-8-0x0000000074FE0000-0x0000000075790000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/5008-13-0x0000000074F30000-0x00000000756E0000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/5008-14-0x0000000074F30000-0x00000000756E0000-memory.dmp

    Filesize

    7.7MB

    Download