Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240214-en
  • resource tags

    arch:x64arch:x86image:win11-20240214-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    24/03/2024, 15:56

General

  • Target

    ec23819b3f561cd470f58ff604599056750fe19acf293f3e7ec5e04de67055c4.exe

  • Size

    2.0MB

  • MD5

    8c1c13798323be32ba6179cf4bc9f6be

  • SHA1

    0f6f8e59853de96dd56186cb65179351b29610bd

  • SHA256

    ec23819b3f561cd470f58ff604599056750fe19acf293f3e7ec5e04de67055c4

  • SHA512

    ab743ce8f676d2c91ae11a3c65a5b0bebbe011a0b6756bfc7bb6c1ab9c77e12a7a89e98d3c8719d9664e0c26f482303aaa299fd799e92dd7b9e5916de60908f5

  • SSDEEP

    49152:32RULX7V6s/3heWFjK7feeAsCF3xp7OQRj7G9V//ZPjaI:mmLX7os/heWpK7pgpZRj7GzJPjaI

Malware Config

Extracted

Family

socks5systemz

C2

http://csexuke.net/search/?q=67e28dd83a58f22a160bab1e7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978a071ea771795af8e05c642db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ffe13c9ea9d9f39

http://csexuke.net/search/?q=67e28dd83a58f22a160bab1e7c27d78406abdd88be4b12eab517aa5c96bd86ef968344815a8bbc896c58e713bc90c91936b5281fc235a925ed3e03d6bd974a95129070b611e96cc92be510b866db51b9e34eed4c2b14a82966836f23d7f210c7ee949832c8679314

Signatures

  • Detect Socks5Systemz Payload 5 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 IoCs
  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ec23819b3f561cd470f58ff604599056750fe19acf293f3e7ec5e04de67055c4.exe
    "C:\Users\Admin\AppData\Local\Temp\ec23819b3f561cd470f58ff604599056750fe19acf293f3e7ec5e04de67055c4.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1676
    • C:\Users\Admin\AppData\Local\Temp\is-MAPC8.tmp\ec23819b3f561cd470f58ff604599056750fe19acf293f3e7ec5e04de67055c4.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-MAPC8.tmp\ec23819b3f561cd470f58ff604599056750fe19acf293f3e7ec5e04de67055c4.tmp" /SL5="$40240,1758683,54272,C:\Users\Admin\AppData\Local\Temp\ec23819b3f561cd470f58ff604599056750fe19acf293f3e7ec5e04de67055c4.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:4800
      • C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
        "C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe" -i
        3⤵
        • Executes dropped EXE
        PID:4900
      • C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
        "C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe" -s
        3⤵
        • Executes dropped EXE
        PID:5084

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

          Filesize

          2.0MB

          MD5

          dc8aedec9118fcb4ab4f8e50928d9e12

          SHA1

          380cb0b101c8d03ece5f91627cb1ca1cca094a33

          SHA256

          84ac321b081589c308bf974c6193891bb8d61bb933443db676ce92bc6553f453

          SHA512

          01a3c95c264c34c428e210ae1f8d7e26f5a8525b4492c04f912ae0710098581635da0f968ec5a3243364956605b8d2b93bb834b10d554007cc6f1e16c4842931

        • C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

          Filesize

          1.7MB

          MD5

          98a88495b41fb36cb986098c0c24bc53

          SHA1

          615f9b740eeece55183018450682abccc613ea5d

          SHA256

          c925bb7a0f99b518b28f6679fe77a5fadb98581f4e041b89e903719b913cb8b8

          SHA512

          d2244fa6d7300d9b586af17f0c0c5849b33c8fbb3a0f6a790bbdba40677964cb26712931c57830c4d95122fc05c09835692813525470703a615b229205e6364b

        • C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

          Filesize

          1.2MB

          MD5

          ec6d3ceb3f032a7f26c60deb440e6fe3

          SHA1

          4197d59e82032ee35f5123e90a5d296df5e1826f

          SHA256

          9d514014881a2bc7efc62c17a8baa2aa4cbedc534c2b58cfafc44340ad205d2d

          SHA512

          c326f97bdea8cd416a38b55d53d175d22cef672cf3af33ce0f4aff883dcbeca205f3e81da9f7ebf2ee564bbe4a97e2ebf1598f33c41ad10961966a24e67aa684

        • C:\Users\Admin\AppData\Local\Temp\is-JVLRN.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-MAPC8.tmp\ec23819b3f561cd470f58ff604599056750fe19acf293f3e7ec5e04de67055c4.tmp

          Filesize

          677KB

          MD5

          5a1e3d46cb5a24f8e50b2a59d2ba1cf3

          SHA1

          fe86894c4757c144449bc744649b7fb9e03346f1

          SHA256

          d3a2c2ce7d70b3b9c30faf3f72bf4ebcdea8f331d6b6cac5dae906327997985d

          SHA512

          a27dc5c443abb31826b14e514aa717be5bf0f548b82170f79705f45ca28abaedc485c5b8738044735f61eca9e1f0ca659b519a3947551404085d07202ae709af

        • memory/1676-2-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/1676-48-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/1676-0-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/4800-7-0x0000000002450000-0x0000000002451000-memory.dmp

          Filesize

          4KB

        • memory/4800-49-0x0000000000400000-0x00000000004B8000-memory.dmp

          Filesize

          736KB

        • memory/4800-51-0x0000000002450000-0x0000000002451000-memory.dmp

          Filesize

          4KB

        • memory/4900-38-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/4900-42-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/4900-43-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/4900-39-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-54-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-75-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-47-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-45-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-55-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-58-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-61-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-64-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-66-0x00000000008F0000-0x0000000000992000-memory.dmp

          Filesize

          648KB

        • memory/5084-69-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-70-0x00000000008F0000-0x0000000000992000-memory.dmp

          Filesize

          648KB

        • memory/5084-50-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-78-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-79-0x00000000008F0000-0x0000000000992000-memory.dmp

          Filesize

          648KB

        • memory/5084-82-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-85-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-88-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-91-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-92-0x00000000008F0000-0x0000000000992000-memory.dmp

          Filesize

          648KB

        • memory/5084-93-0x00000000008F0000-0x0000000000992000-memory.dmp

          Filesize

          648KB

        • memory/5084-97-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/5084-100-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB