Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    28-06-2024 22:54

General

  • Target

    44ae9b54c322a598bf0b04a591d69216718a606f4aa01ab72307eed94aec1706.exe

  • Size

    47KB

  • MD5

    4a56c6e517888a3524999e18e6d7740b

  • SHA1

    3781d9472264ca9af471cdc80ffc87c34134c112

  • SHA256

    44ae9b54c322a598bf0b04a591d69216718a606f4aa01ab72307eed94aec1706

  • SHA512

    0b7c6c0f82b19b20632d8a8d8c93a772f175acc0bf1c9ff1a57f5e731f739806b98663f824a7ec07843cad2fe69376bba57967587a86e5dfe4dc890df334ba4e

  • SSDEEP

    768:Euzkx3FTkYwt9y4gWUOlKnjamo2q8ayby6FXbWPI8rQ9Hyfw+0bF3HFZBzUccTUW:EuS3FTHHe2Gy+6Z78rQ9HGWbF3T9U5+Q

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

Mutex

0UfuvIZfaBv8

Attributes
  • delay

    3

  • install

    true

  • install_file

    api.exe

  • install_folder

    %AppData%

  • pastebin_config

    https://pastebin.com/raw/aDAYnLv4

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 28 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\44ae9b54c322a598bf0b04a591d69216718a606f4aa01ab72307eed94aec1706.exe
    "C:\Users\Admin\AppData\Local\Temp\44ae9b54c322a598bf0b04a591d69216718a606f4aa01ab72307eed94aec1706.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2732
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "api" /tr '"C:\Users\Admin\AppData\Roaming\api.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2908
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "api" /tr '"C:\Users\Admin\AppData\Roaming\api.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2656
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1FFF.tmp.bat""
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:860
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2660
      • C:\Users\Admin\AppData\Roaming\api.exe
        "C:\Users\Admin\AppData\Roaming\api.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:2784

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp1FFF.tmp.bat

    Filesize

    147B

    MD5

    2629180e481445b3a88a00391a7fcc66

    SHA1

    e539dbad5e285dcf69ae22ea18a407580596d3db

    SHA256

    fbd1687c1c0ef67f9867ff07eaea4db113804c9131d27261afe79c2d9fe6ff8e

    SHA512

    370ad4c5cb846b1fff8836be9ffddea3f74df6b31008871bdfe1565c5878157508abd25e1f7bc492298b32d9f576c358102599934edfd3f21e4c86711a96b403

  • \Users\Admin\AppData\Roaming\api.exe

    Filesize

    47KB

    MD5

    4a56c6e517888a3524999e18e6d7740b

    SHA1

    3781d9472264ca9af471cdc80ffc87c34134c112

    SHA256

    44ae9b54c322a598bf0b04a591d69216718a606f4aa01ab72307eed94aec1706

    SHA512

    0b7c6c0f82b19b20632d8a8d8c93a772f175acc0bf1c9ff1a57f5e731f739806b98663f824a7ec07843cad2fe69376bba57967587a86e5dfe4dc890df334ba4e

  • memory/2732-0-0x00000000743AE000-0x00000000743AF000-memory.dmp

    Filesize

    4KB

  • memory/2732-1-0x0000000000BA0000-0x0000000000BB2000-memory.dmp

    Filesize

    72KB

  • memory/2732-2-0x00000000743A0000-0x0000000074A8E000-memory.dmp

    Filesize

    6.9MB

  • memory/2732-12-0x00000000743A0000-0x0000000074A8E000-memory.dmp

    Filesize

    6.9MB

  • memory/2784-16-0x0000000000830000-0x0000000000842000-memory.dmp

    Filesize

    72KB