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Resubmissions

12/03/2025, 21:32

250312-1dmynatxey 10

11/03/2025, 16:10

250311-tmgdxaxnx4 10

06/03/2025, 02:30

250306-cze8yav1az 10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250217-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/03/2025, 02:30

General

  • Target

    66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe

  • Size

    363KB

  • MD5

    ddbbbb0895f1997339c1c388f853f65d

  • SHA1

    d79b5cab17509a0aaeef232947a3992a20a706be

  • SHA256

    66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6

  • SHA512

    a3912b39b1efe5e56b970ba4e2a64bc76a36c1edfc1774ac3dc987e9f89fa6468ff26db69e58854a1b11e58bcaa64789a223fadc9f599649cb5cc08db936307a

  • SSDEEP

    6144:/dua0sl91E4sxEMu7PyV+xEv7C8825EbpU5:/dua0slPEZyMujyV2Op8O4U5

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

iphy.strangled.net:1604

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Asyncrat family
  • 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 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe
    "C:\Users\Admin\AppData\Local\Temp\66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3344
    • C:\Users\Admin\AppData\Local\Temp\AfraidDns_Async.exe
      "C:\Users\Admin\AppData\Local\Temp\AfraidDns_Async.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:3636
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\win10\win10.exe'" /f
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4996
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\win10\win10.exe'" /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2648
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6.exe" "C:\Users\Admin\AppData\Local\Temp\win10\win10.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:624
  • C:\Users\Admin\AppData\Local\Temp\win10\win10.exe
    C:\Users\Admin\AppData\Local\Temp\win10\win10.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:848
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 848 -s 888
      2⤵
      • Program crash
      PID:2712
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 848 -ip 848
    1⤵
      PID:4348
    • C:\Users\Admin\AppData\Local\Temp\win10\win10.exe
      C:\Users\Admin\AppData\Local\Temp\win10\win10.exe
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:1880
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1880 -s 860
        2⤵
        • Program crash
        PID:3104
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 1880 -ip 1880
      1⤵
        PID:2360

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\AfraidDns_Async.exe

        Filesize

        47KB

        MD5

        c1dcd0d286ad0121901f2c269c86d16b

        SHA1

        10acacc80588f73f5197adc0ea7cf1eadb49c793

        SHA256

        16d86733b11a9fd3ec2a732c2ca18c04c427d9fb9ddf1bdc14fe4109644854f9

        SHA512

        919dc181df55584c744d98344ae340ad2a844aed278570dc2729f430234e3ce7539bc9807a522c7b73d8e26c05cdf5a45851ba88688e7840b03e7ffb7c278618

      • C:\Users\Admin\AppData\Local\Temp\win10\win10.exe

        Filesize

        363KB

        MD5

        ddbbbb0895f1997339c1c388f853f65d

        SHA1

        d79b5cab17509a0aaeef232947a3992a20a706be

        SHA256

        66b157a3d414b913b1a436edc71e8fc733c1f5457302fe9ca950a8b16d86b9e6

        SHA512

        a3912b39b1efe5e56b970ba4e2a64bc76a36c1edfc1774ac3dc987e9f89fa6468ff26db69e58854a1b11e58bcaa64789a223fadc9f599649cb5cc08db936307a

      • memory/848-28-0x0000000000B30000-0x0000000000B90000-memory.dmp

        Filesize

        384KB

      • memory/3344-1-0x0000000000850000-0x00000000008B0000-memory.dmp

        Filesize

        384KB

      • memory/3344-2-0x00000000058F0000-0x0000000005E94000-memory.dmp

        Filesize

        5.6MB

      • memory/3344-3-0x0000000074C70000-0x0000000075420000-memory.dmp

        Filesize

        7.7MB

      • memory/3344-0-0x0000000074C7E000-0x0000000074C7F000-memory.dmp

        Filesize

        4KB

      • memory/3344-20-0x0000000074C70000-0x0000000075420000-memory.dmp

        Filesize

        7.7MB

      • memory/3636-16-0x0000000074C70000-0x0000000075420000-memory.dmp

        Filesize

        7.7MB

      • memory/3636-22-0x0000000004E40000-0x0000000004EA6000-memory.dmp

        Filesize

        408KB

      • memory/3636-23-0x00000000052F0000-0x000000000538C000-memory.dmp

        Filesize

        624KB

      • memory/3636-24-0x0000000074C70000-0x0000000075420000-memory.dmp

        Filesize

        7.7MB

      • memory/3636-25-0x0000000074C70000-0x0000000075420000-memory.dmp

        Filesize

        7.7MB

      • memory/3636-21-0x0000000074C70000-0x0000000075420000-memory.dmp

        Filesize

        7.7MB

      • memory/3636-15-0x00000000005E0000-0x00000000005F2000-memory.dmp

        Filesize

        72KB