Overview

overview

10

Static

static

10

4439ef5204...91.exe

windows7-x64

10

4439ef5204...91.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    146s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240730-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-08-2024 12:19

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General

  • Target

    4439ef5204e48d27ce6a05e726744a91.exe

  • Size

    47KB

  • MD5

    4439ef5204e48d27ce6a05e726744a91

  • SHA1

    c423d37e120c92c8dcbfb44ee2b8db2572034dc6

  • SHA256

    0680d99cd3e9932de4429d04bbbf6032e8b670700d70d758d9377e899552fc9a

  • SHA512

    e4eaf577f22f84f2842b156c9a278372916267afe40d9f720095ef44c47616812fb787067dc1c4f1751100994c40f3c0a0a38aff539407401a42d03acf1ec0ad

  • SSDEEP

    768:RuokxmFTkUE1YAgWUOl1nyamo2qRA7uBCwnUnHSLyhPImmL0bX0MN379sqJA16lN:RuokxmFTkUMYi1t29PwnS+mmAbX0UL9H

Score
10/10
asyncratdefaultdiscoveryrat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

45.90.13.137:7707

Mutex

ZD8FXEva3syi

Attributes
  • delay

    3

  • install

    true

  • install_file

    Server-Host.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).

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • 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 3 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4439ef5204e48d27ce6a05e726744a91.exe
    "C:\Users\Admin\AppData\Local\Temp\4439ef5204e48d27ce6a05e726744a91.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4680
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Server-Host" /tr '"C:\Users\Admin\AppData\Roaming\Server-Host.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4544
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Server-Host" /tr '"C:\Users\Admin\AppData\Roaming\Server-Host.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:4872
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC66D.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2252
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:2508
      • C:\Users\Admin\AppData\Roaming\Server-Host.exe
        "C:\Users\Admin\AppData\Roaming\Server-Host.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:4400

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpC66D.tmp.bat
    Filesize

    155B

    MD5

    730765e132c4830eb2c945e7afc8b085

    SHA1

    8f50a072cd58ac9eccd515766c59b8d61bb9bcf2

    SHA256

    9c0897be7babbc2a05a80b3cc0c793f80658e034e4f9923e65379d4ee5a9bfb1

    SHA512

    82460fd739042e4084fa0de4bfb8cc2b4d865295f551574e8f9d4149ff86c7036dbda06a9222671e8b24debb74f4ace0ffa9f3e96de6f847b58030b8cdb89239

    Download Submit

  • C:\Users\Admin\AppData\Roaming\Server-Host.exe
    Filesize

    47KB

    MD5

    4439ef5204e48d27ce6a05e726744a91

    SHA1

    c423d37e120c92c8dcbfb44ee2b8db2572034dc6

    SHA256

    0680d99cd3e9932de4429d04bbbf6032e8b670700d70d758d9377e899552fc9a

    SHA512

    e4eaf577f22f84f2842b156c9a278372916267afe40d9f720095ef44c47616812fb787067dc1c4f1751100994c40f3c0a0a38aff539407401a42d03acf1ec0ad

    Download Submit

  • memory/4400-14-0x00000000743D0000-0x0000000074B80000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/4400-15-0x00000000743D0000-0x0000000074B80000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/4680-0-0x000000007446E000-0x000000007446F000-memory.dmp

    Filesize

    4KB

    Download

  • memory/4680-1-0x0000000000E40000-0x0000000000E52000-memory.dmp

    Filesize

    72KB

    Download

  • memory/4680-2-0x0000000074460000-0x0000000074C10000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/4680-3-0x00000000056F0000-0x0000000005756000-memory.dmp

    Filesize

    408KB

    Download

  • memory/4680-4-0x0000000005B40000-0x0000000005BDC000-memory.dmp

    Filesize

    624KB

    Download

  • memory/4680-9-0x0000000074460000-0x0000000074C10000-memory.dmp

    Filesize

    7.7MB

    Download