Overview

overview

10

Static

static

10

99a06d8a9e...83.exe

windows7-x64

10

99a06d8a9e...83.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-12-2024 12:02

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General

  • Target

    99a06d8a9eda7ba2d19da54c2759a783e20922a73a4893caccc220cdaa27a883.exe

  • Size

    312KB

  • MD5

    520e6035e15a9422e1c4cbada69263aa

  • SHA1

    96915e5d6adf90533c2309c84e226598773d83ec

  • SHA256

    99a06d8a9eda7ba2d19da54c2759a783e20922a73a4893caccc220cdaa27a883

  • SHA512

    ffcf1ff0d9161bdc9c1bbdedc66bccb8bcf74874d25ff4f4436c57aa417160c55914ccb9cb97645c728dd4d230908f707733c30c53faeb0bbfd71e6306999b3b

  • SSDEEP

    6144:Eu6ABA0Krb3LVhA+EWHYSS66Wy6666D6b6666H666K666Z2v666y7N6oZCGEB6ax:EwKXRlYSS66Wy6666D6b6666H666K666

Score
10/10
asyncratdefaultdiscoveryrat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

18.141.204.5:80

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    syteam.exe

  • install_folder

    %Temp%

aes.plain

Signatures

  • AsyncRat

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

    ratasyncrat
  • Asyncrat family
    asyncrat
  • 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 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\99a06d8a9eda7ba2d19da54c2759a783e20922a73a4893caccc220cdaa27a883.exe
    "C:\Users\Admin\AppData\Local\Temp\99a06d8a9eda7ba2d19da54c2759a783e20922a73a4893caccc220cdaa27a883.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4596
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "syteam" /tr '"C:\Users\Admin\AppData\Local\Temp\syteam.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3644
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "syteam" /tr '"C:\Users\Admin\AppData\Local\Temp\syteam.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:3024
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA930.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3508
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:464
      • C:\Users\Admin\AppData\Local\Temp\syteam.exe
        "C:\Users\Admin\AppData\Local\Temp\syteam.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:3440

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\syteam.exe
    Filesize

    312KB

    MD5

    520e6035e15a9422e1c4cbada69263aa

    SHA1

    96915e5d6adf90533c2309c84e226598773d83ec

    SHA256

    99a06d8a9eda7ba2d19da54c2759a783e20922a73a4893caccc220cdaa27a883

    SHA512

    ffcf1ff0d9161bdc9c1bbdedc66bccb8bcf74874d25ff4f4436c57aa417160c55914ccb9cb97645c728dd4d230908f707733c30c53faeb0bbfd71e6306999b3b

    Download Submit

  • C:\Users\Admin\AppData\Local\Temp\tmpA930.tmp.bat
    Filesize

    153B

    MD5

    bba6eb157df4f3fda1f651b532a86fe8

    SHA1

    d6699a20f67a407d8f41fb9f535d2c50d3503f3d

    SHA256

    7fb6e57a5c79c2b3c4b72c7dcdea8ec51424290ed7bf842cea78beacb1b010d2

    SHA512

    ab070db4ee42e5d23eef38e78b63dedbcda6a67c1d7175b9725a82e1b59c8a4cb528bd8b07bd765b558ebc196ee69acf3726328e792e6b587cd518bf79f1555f

    Download Submit

  • memory/3440-13-0x0000000074EF0000-0x00000000756A0000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/3440-14-0x0000000074EF0000-0x00000000756A0000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/4596-0-0x0000000074FAE000-0x0000000074FAF000-memory.dmp

    Filesize

    4KB

    Download

  • memory/4596-1-0x00000000001D0000-0x0000000000224000-memory.dmp

    Filesize

    336KB

    Download

  • memory/4596-2-0x0000000074FA0000-0x0000000075750000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/4596-3-0x0000000004BD0000-0x0000000004C6C000-memory.dmp

    Filesize

    624KB

    Download

  • memory/4596-8-0x0000000074FA0000-0x0000000075750000-memory.dmp

    Filesize

    7.7MB

    Download