Analysis

  • max time kernel
    146s
  • max time network
    133s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    29/05/2024, 18:24

General

  • Target

    Server.exe

  • Size

    175KB

  • MD5

    e801aa3cb811d606a50a76786e41b221

  • SHA1

    e79d850e46a3804972c0510dbccbcbe1b255b60f

  • SHA256

    a10b01aa48b1c95f730aac0d28ca7c2bc41e822b675fc6a2010fa17f8c00181b

  • SHA512

    368a3a73d07e5938aeeb3af6b66178289765a95b88633c519fefefbe6e1d229ad246b3ff092444ac94f5623e45a2462b703433e8f01ff60a102c09d6868e6d8c

  • SSDEEP

    3072:de8p6ewdOIwQx76vK/bvTv0cU+lL/dMlZZUZ0b2gTTwARE+WpCc:B6ewwIwQJ6vKX0c5MlYZ0b28

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

https://api.telegram.org/bot7346820426:AAE3aepHX-AAQvBLMmoXhCoPgsUfSLO3SR4/sendMessage?chat_id=1979310363

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#.

  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty payload 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops desktop.ini file(s) 7 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Looks up geolocation information via web service

    Uses a legitimate geolocation service to find the infected system's geolocation info.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 36 IoCs
  • Suspicious use of SendNotifyMessage 36 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Server.exe
    "C:\Users\Admin\AppData\Local\Temp\Server.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1304
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1404
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
          PID:2216
        • C:\Windows\SysWOW64\netsh.exe
          netsh wlan show profile
          3⤵
            PID:1932
          • C:\Windows\SysWOW64\findstr.exe
            findstr All
            3⤵
              PID:2248
          • C:\Windows\SysWOW64\cmd.exe
            "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1788
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              3⤵
                PID:1988
              • C:\Windows\SysWOW64\netsh.exe
                netsh wlan show networks mode=bssid
                3⤵
                  PID:2000
            • C:\Windows\system32\taskmgr.exe
              "C:\Windows\system32\taskmgr.exe" /4
              1⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of FindShellTrayWindow
              • Suspicious use of SendNotifyMessage
              PID:1804

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

              Filesize

              70KB

              MD5

              49aebf8cbd62d92ac215b2923fb1b9f5

              SHA1

              1723be06719828dda65ad804298d0431f6aff976

              SHA256

              b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

              SHA512

              bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

            • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

              Filesize

              342B

              MD5

              de5a2e351d5850d68354d6e360c4a868

              SHA1

              76457e9a33644c30b7f063863db0e0db8a228f1f

              SHA256

              53d4ea95234594a24ade8bf1b27444e37f024d28eb5cb2cb494d7b6a2c1fcbd7

              SHA512

              81be7c11c9c4fc9a7bed36dfa4126b0be7355ac889107365106d95103218e9e0c41a3917977400741c550f42d1ed8ecb7e28f1b46e4dd7a0c9bbfbacf3b3ac3d

            • C:\Users\Admin\AppData\Local\Temp\Cab43AE.tmp

              Filesize

              68KB

              MD5

              29f65ba8e88c063813cc50a4ea544e93

              SHA1

              05a7040d5c127e68c25d81cc51271ffb8bef3568

              SHA256

              1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

              SHA512

              e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

            • C:\Users\Admin\AppData\Local\Temp\Tar4480.tmp

              Filesize

              181KB

              MD5

              4ea6026cf93ec6338144661bf1202cd1

              SHA1

              a1dec9044f750ad887935a01430bf49322fbdcb7

              SHA256

              8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

              SHA512

              6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

            • C:\Users\Admin\AppData\Local\c6e97154e893adafd848eb543e751a8e\msgid.dat

              Filesize

              1B

              MD5

              cfcd208495d565ef66e7dff9f98764da

              SHA1

              b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

              SHA256

              5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

              SHA512

              31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

            • memory/1304-69-0x0000000074E20000-0x000000007550E000-memory.dmp

              Filesize

              6.9MB

            • memory/1304-0-0x0000000074E2E000-0x0000000074E2F000-memory.dmp

              Filesize

              4KB

            • memory/1304-2-0x0000000074E20000-0x000000007550E000-memory.dmp

              Filesize

              6.9MB

            • memory/1304-1-0x00000000012E0000-0x0000000001312000-memory.dmp

              Filesize

              200KB

            • memory/1304-144-0x0000000074E2E000-0x0000000074E2F000-memory.dmp

              Filesize

              4KB

            • memory/1304-145-0x0000000074E20000-0x000000007550E000-memory.dmp

              Filesize

              6.9MB

            • memory/1304-146-0x0000000074E20000-0x000000007550E000-memory.dmp

              Filesize

              6.9MB

            • memory/1804-147-0x0000000140000000-0x00000001405E8000-memory.dmp

              Filesize

              5.9MB

            • memory/1804-148-0x0000000140000000-0x00000001405E8000-memory.dmp

              Filesize

              5.9MB